3D156 CDC Vol. 2

1. (202) What are the modulation frequencies in the localizer course transmitter?

90,150, and 2250 Hz.

150 and 2259 Hz.

90, and 2259 Hz.

90, 150, and 1020 Hz.

The modulation frequencies in the localizer course transmitter are 90, 150, and 1020 Hz.

Explanation

The modulation frequencies in the localizer course transmitter are 90, 150, and 1020 Hz.

2. (203) An 18.5 percent modulation difference converted to difference in depth of modulation (DDM) is

.018.

.185.

1.85.

185.

The question asks for the difference in depth of modulation (DDM) when the modulation difference is 18.5 percent. To convert the modulation difference to DDM, we divide the percentage by 100. Therefore, 18.5 percent is equal to 0.185.

Explanation

The question asks for the difference in depth of modulation (DDM) when the modulation difference is 18.5 percent. To convert the modulation difference to DDM, we divide the percentage by 100. Therefore, 18.5 percent is equal to 0.185.

3. (201) The localizer equipment shelter is generally painted what colors?

International orange and white.

Olive drab and black.

Brown and tan.

Red and White.

The localizer equipment shelter is generally painted in international orange and white colors. These colors are commonly used for visibility and safety purposes. International orange is a highly visible color that stands out against most backgrounds, making it easier to locate the shelter. White is often used as a contrasting color to enhance visibility and provide a clear distinction between different elements of the shelter. By using these colors, the localizer equipment shelter can be easily identified and spotted, ensuring its visibility and accessibility.

Explanation

The localizer equipment shelter is generally painted in international orange and white colors. These colors are commonly used for visibility and safety purposes. International orange is a highly visible color that stands out against most backgrounds, making it easier to locate the shelter. White is often used as a contrasting color to enhance visibility and provide a clear distinction between different elements of the shelter. By using these colors, the localizer equipment shelter can be easily identified and spotted, ensuring its visibility and accessibility.

4. (202) The localizer station is designed for what type of operation?

Local control.

Remote control.

Continuous unmanned.

Intermittent unmanned.

The localizer station is designed for continuous unmanned operation. This means that it can function without the need for constant human presence or control. The station is likely equipped with automated systems and technologies that allow it to operate continuously without interruption. This type of design is particularly useful in scenarios where continuous monitoring or control is required, such as in industrial processes or remote surveillance.

Explanation

The localizer station is designed for continuous unmanned operation. This means that it can function without the need for constant human presence or control. The station is likely equipped with automated systems and technologies that allow it to operate continuously without interruption. This type of design is particularly useful in scenarios where continuous monitoring or control is required, such as in industrial processes or remote surveillance.

5. (203) What is the capture effect principle in reference to the localizer?

Stronger radiated signal controls the aircraft receiver.

Weaker radiated signal controls the aircraft receiver.

Aircraft transmitter controls the localizer.

Aircraft receiver controls the localizer.

The capture effect principle in reference to the localizer is when the stronger radiated signal controls the aircraft receiver. This means that if there are multiple signals being received by the aircraft, the receiver will lock onto the stronger signal and follow its guidance. This is important for maintaining accurate navigation and ensuring that the aircraft stays on the correct course.

Explanation

The capture effect principle in reference to the localizer is when the stronger radiated signal controls the aircraft receiver. This means that if there are multiple signals being received by the aircraft, the receiver will lock onto the stronger signal and follow its guidance. This is important for maintaining accurate navigation and ensuring that the aircraft stays on the correct course.

6. (203) If during a ground check you are taking a measurement from the 35° survey checkpoint, where on the airfield are you located?

Runway centerline.

Runway threshold.

Near field arc.

Far field arc.

If you are taking a measurement from the 35° survey checkpoint during a ground check, you are located on the near field arc of the airfield. The near field arc is a specific location on the airfield that is used as a reference point for measurements and surveys. It is typically located near the runway centerline and is used to ensure accurate positioning and alignment of various elements on the airfield.

Explanation

If you are taking a measurement from the 35° survey checkpoint during a ground check, you are located on the near field arc of the airfield. The near field arc is a specific location on the airfield that is used as a reference point for measurements and surveys. It is typically located near the runway centerline and is used to ensure accurate positioning and alignment of various elements on the airfield.

7. (216) In reference to flight inspection, the supervisor makes sure all possible ground calibration and checking are done

During flight check.

Before flight check arrival.

After flight check departure.

As directed by flight check personnel.

The supervisor in flight inspection ensures that all necessary ground calibration and checking are completed before the arrival of the flight check. This implies that the supervisor is responsible for ensuring that the necessary preparations and checks are done prior to the flight check taking place.

Explanation

The supervisor in flight inspection ensures that all necessary ground calibration and checking are completed before the arrival of the flight check. This implies that the supervisor is responsible for ensuring that the necessary preparations and checks are done prior to the flight check taking place.

8. (203) In the localizer, what frequency, in kilohertz (kHz), is the course (CRS) carrier transmitter?

Station assigned frequency (SAF) + 4.00.

SAF +4.75.

SAF -4.75.

SAF -4.00.

The correct answer is SAF +4.75. This means that the frequency of the course (CRS) carrier transmitter is the station assigned frequency (SAF) plus 4.75 kHz.

Explanation

The correct answer is SAF +4.75. This means that the frequency of the course (CRS) carrier transmitter is the station assigned frequency (SAF) plus 4.75 kHz.

9. (203) How does the kilohertz (kHz) output frequency of the localizer clearance transmitter compare to the assigned localizer station frequency?

4.0 above.

4.0 below.

4.75 above.

4.75 below.

The kilohertz (kHz) output frequency of the localizer clearance transmitter is 4.75 below the assigned localizer station frequency.

Explanation

The kilohertz (kHz) output frequency of the localizer clearance transmitter is 4.75 below the assigned localizer station frequency.

10. (208) What is the primary method of operator control and monitoring of the very high frequency omni-directional and radio range (VOR) Navigational Set?

Monitors.

Transmitter Assembly.

Local or remote personal computer (PC).

Radio frequency (RF) transmission switch.

The primary method of operator control and monitoring of the VOR Navigational Set is through a local or remote personal computer (PC). This means that operators can use a computer to control and monitor the VOR system, whether they are physically present at the location or accessing it remotely. This allows for convenient and efficient management of the VOR system.

Explanation

The primary method of operator control and monitoring of the VOR Navigational Set is through a local or remote personal computer (PC). This means that operators can use a computer to control and monitor the VOR system, whether they are physically present at the location or accessing it remotely. This allows for convenient and efficient management of the VOR system.

11. (216) Which flight inspection is required if there is a major equipment modification or an accident?

Commissioning.

Site evaluation.

Surveillance.

Special.

If there is a major equipment modification or an accident, a special flight inspection is required. This type of inspection is conducted to ensure that the modified equipment or repaired system is functioning properly and meets all safety standards. It is necessary to assess the effectiveness of the modification or repair and to verify that the aircraft is in compliance with all applicable regulations. The special flight inspection helps to ensure the continued safety and reliability of the aircraft after any significant changes or incidents.

Explanation

If there is a major equipment modification or an accident, a special flight inspection is required. This type of inspection is conducted to ensure that the modified equipment or repaired system is functioning properly and meets all safety standards. It is necessary to assess the effectiveness of the modification or repair and to verify that the aircraft is in compliance with all applicable regulations. The special flight inspection helps to ensure the continued safety and reliability of the aircraft after any significant changes or incidents.

12. (216) A facility which meets all tolerances and is fully usable within its service area is classified as

Unusable.

Reliable.

Restricted.

Unrestricted.

A facility that meets all tolerances and is fully usable within its service area is classified as "unrestricted." This means that there are no limitations or restrictions in terms of its functionality or accessibility. It implies that the facility is fully operational and can be utilized without any limitations or constraints.

Explanation

A facility that meets all tolerances and is fully usable within its service area is classified as "unrestricted." This means that there are no limitations or restrictions in terms of its functionality or accessibility. It implies that the facility is fully operational and can be utilized without any limitations or constraints.

13. (221) A very high frequency omni-directional and radio range (VOR) that meets all operating tolerances is classified as

Unusable.

Restricted.

Satisfactory.

Unrestricted.

A VOR that meets all operating tolerances and is classified as unrestricted means that it is in full working condition and can be used without any limitations or restrictions. It is reliable and provides accurate omni-directional and radio range signals, making it suitable for navigation purposes.

Explanation

A VOR that meets all operating tolerances and is classified as unrestricted means that it is in full working condition and can be used without any limitations or restrictions. It is reliable and provides accurate omni-directional and radio range signals, making it suitable for navigation purposes.

14. (222) How often are historical files reviewed?

Annually.

Bi-annually.

Semi-annually.

Whenever new information is added.

Historical files are reviewed annually, which means they are examined once every year. This regular review ensures that the information contained in the files is up to date and accurate. It allows for any new information to be added or any outdated information to be removed. By reviewing historical files annually, organizations can maintain the integrity and relevance of their historical data.

Explanation

Historical files are reviewed annually, which means they are examined once every year. This regular review ensures that the information contained in the files is up to date and accurate. It allows for any new information to be added or any outdated information to be removed. By reviewing historical files annually, organizations can maintain the integrity and relevance of their historical data.

15. (203) What is the first basic operation of the localizer station?

Monitor the radiated pattern.

Radiating the pattern.

Control transmitter.

Update status.

The first basic operation of the localizer station is radiating the pattern. This means that the localizer station is responsible for transmitting the radio signals that form the pattern used by aircraft to determine their position relative to the runway centerline during approach and landing. By radiating the pattern, the localizer station ensures that the necessary signals are available for aircraft to accurately navigate and align themselves with the runway.

Explanation

The first basic operation of the localizer station is radiating the pattern. This means that the localizer station is responsible for transmitting the radio signals that form the pattern used by aircraft to determine their position relative to the runway centerline during approach and landing. By radiating the pattern, the localizer station ensures that the necessary signals are available for aircraft to accurately navigate and align themselves with the runway.

16. (203) How many log-periodic dipole antennas (LPD) are there in the localizer antenna array?

7.

10.

14.

16.

There are 14 log-periodic dipole antennas (LPD) in the localizer antenna array.

Explanation

There are 14 log-periodic dipole antennas (LPD) in the localizer antenna array.

17. (203) In watts (W) and milliwatts (mW) respectively, what is the nominal localizer course transmitter carrier-plus sideband (CSB) and sideband only (SBO) power?

15, 360.

10, 300.

5, 190.

3, 190.

The nominal localizer course transmitter carrier-plus sideband (CSB) power is 15 watts (W) and the sideband only (SBO) power is 360 milliwatts (mW).

Explanation

The nominal localizer course transmitter carrier-plus sideband (CSB) power is 15 watts (W) and the sideband only (SBO) power is 360 milliwatts (mW).

18. (203) Which unit of the localizer course transmitter provides a means of suppressing the carrier in the sideband only (SBO)?

Exciter.

Modulator assembly.

Identification keyer.

Diode-switching network.

The diode-switching network is the unit of the localizer course transmitter that provides a means of suppressing the carrier in the sideband only (SBO). This network uses diodes to switch the carrier on and off, allowing only the sideband signal to be transmitted. This helps to improve the accuracy and clarity of the localizer course signal by eliminating unwanted carrier signals. The exciter generates the carrier signal, the modulator assembly modulates the carrier with the navigation information, and the identification keyer adds identification signals to the transmission.

Explanation

The diode-switching network is the unit of the localizer course transmitter that provides a means of suppressing the carrier in the sideband only (SBO). This network uses diodes to switch the carrier on and off, allowing only the sideband signal to be transmitted. This helps to improve the accuracy and clarity of the localizer course signal by eliminating unwanted carrier signals. The exciter generates the carrier signal, the modulator assembly modulates the carrier with the navigation information, and the identification keyer adds identification signals to the transmission.

19. (203) What provides samples of the localizer radiated signals to the radio frequency (RF) combining network?

Sampling loops in each log periodic dipole (LPD).

Clearance frequency distribution unit.

Course frequency distribution unit.

Integral detectors.

Sampling loops in each log periodic dipole (LPD) provide samples of the localizer radiated signals to the radio frequency (RF) combining network. These sampling loops are a crucial component of the system as they capture and measure the signals emitted by the localizer. By sampling the signals, the system can accurately determine the direction and position of an aircraft in relation to the localizer. The samples collected by the sampling loops are then fed into the RF combining network, where they are combined and processed to provide the necessary information for navigation and guidance.

Explanation

Sampling loops in each log periodic dipole (LPD) provide samples of the localizer radiated signals to the radio frequency (RF) combining network. These sampling loops are a crucial component of the system as they capture and measure the signals emitted by the localizer. By sampling the signals, the system can accurately determine the direction and position of an aircraft in relation to the localizer. The samples collected by the sampling loops are then fed into the RF combining network, where they are combined and processed to provide the necessary information for navigation and guidance.

20. (203) Which monitor assembly displays the measured parameters?

Signal processor.

Digital readout.

Measurement.

Timing.

The digital readout is the monitor assembly that displays the measured parameters. This means that it is responsible for showing the values of the parameters being measured. The other options, signal processor, measurement, and timing, do not specifically refer to the display of the measured parameters.

Explanation

The digital readout is the monitor assembly that displays the measured parameters. This means that it is responsible for showing the values of the parameters being measured. The other options, signal processor, measurement, and timing, do not specifically refer to the display of the measured parameters.

21. (203) Which localizer signal characteristic does not affect the difference in depth of modulation (DDM)?

Modulation.

Sideband and carrier phasing.

Station assigned frequency (SAF).

Amplitude of the sidebands and carrier.

The station assigned frequency (SAF) does not affect the difference in depth of modulation (DDM) for a localizer signal. DDM is determined by the amplitude of the sidebands and carrier, as well as the modulation and sideband and carrier phasing. SAF refers to the frequency assigned to the localizer station and is not directly related to the modulation characteristics of the signal. Therefore, it does not impact the DDM.

Explanation

The station assigned frequency (SAF) does not affect the difference in depth of modulation (DDM) for a localizer signal. DDM is determined by the amplitude of the sidebands and carrier, as well as the modulation and sideband and carrier phasing. SAF refers to the frequency assigned to the localizer station and is not directly related to the modulation characteristics of the signal. Therefore, it does not impact the DDM.

22. (207) What is one purpose of the squitter pulses transmitted from the TACAN?

Maintain constant transmitter duty cycle.

Maintain constant aircraft contact.

Generate reference pulse groups.

Generate identification pulses.

The purpose of the squitter pulses transmitted from the TACAN is to maintain a constant transmitter duty cycle. This means that the TACAN system ensures that the transmitter is operating continuously and transmitting pulses at a consistent rate. This is important for maintaining a reliable and consistent communication link between the TACAN ground station and the aircraft, allowing for accurate navigation and distance measurement. By transmitting squitter pulses at a constant duty cycle, the TACAN system ensures that the aircraft can continuously receive and process the necessary navigation information.

Explanation

The purpose of the squitter pulses transmitted from the TACAN is to maintain a constant transmitter duty cycle. This means that the TACAN system ensures that the transmitter is operating continuously and transmitting pulses at a consistent rate. This is important for maintaining a reliable and consistent communication link between the TACAN ground station and the aircraft, allowing for accurate navigation and distance measurement. By transmitting squitter pulses at a constant duty cycle, the TACAN system ensures that the aircraft can continuously receive and process the necessary navigation information.

23. (208) In the navigational system, the personal computer (PC) display is divided into how many main windows?

1.

2.

3.

4.

The correct answer is 2. In a navigational system, the personal computer (PC) display is typically divided into two main windows. This allows users to view different types of information simultaneously, such as a map or navigation instructions in one window, and additional details or menus in the other window. This division of the display into two main windows enhances the usability and functionality of the navigational system, making it easier for users to access and interpret the information they need while navigating.

Explanation

The correct answer is 2. In a navigational system, the personal computer (PC) display is typically divided into two main windows. This allows users to view different types of information simultaneously, such as a map or navigation instructions in one window, and additional details or menus in the other window. This division of the display into two main windows enhances the usability and functionality of the navigational system, making it easier for users to access and interpret the information they need while navigating.

24. (214) What assembly in the tactical air navigation (TACAN) system antenna modulation generator contains the system clock and trigger circuits?

Motherboard.

Column driver.

Microprocessor.

Operator interface.

The microprocessor in the TACAN system antenna modulation generator contains the system clock and trigger circuits. The microprocessor is responsible for controlling and coordinating the various functions of the TACAN system, including generating the modulation signals for the antenna. It receives input from the system clock and trigger circuits to ensure accurate timing and synchronization of the signals. The motherboard is the main circuit board that holds and connects all the components of the TACAN system, but it does not specifically contain the clock and trigger circuits. The column driver and operator interface are unrelated to the antenna modulation generator.

Explanation

The microprocessor in the TACAN system antenna modulation generator contains the system clock and trigger circuits. The microprocessor is responsible for controlling and coordinating the various functions of the TACAN system, including generating the modulation signals for the antenna. It receives input from the system clock and trigger circuits to ensure accurate timing and synchronization of the signals. The motherboard is the main circuit board that holds and connects all the components of the TACAN system, but it does not specifically contain the clock and trigger circuits. The column driver and operator interface are unrelated to the antenna modulation generator.

25. (216) Of the flight check personnel, who is often referred to as the panel operator?

Pilot.

Theodolite operator.

Flight inspection pilot.

Flight inspection technician.

The flight check personnel who is often referred to as the panel operator is the flight inspection technician.

Explanation

The flight check personnel who is often referred to as the panel operator is the flight inspection technician.

26. (216) Of the flight check personnel, who do you usually talk to over the radio during a flight inspection?

Pilot.

Theodolite operator.

Flight inspection pilot.

Flight inspection technician.

During a flight inspection, the flight check personnel usually communicate with the flight inspection technician over the radio. The flight inspection technician is responsible for operating and monitoring the equipment used during the inspection, such as the theodolite. They play a crucial role in ensuring the accuracy and effectiveness of the flight inspection process.

Explanation

During a flight inspection, the flight check personnel usually communicate with the flight inspection technician over the radio. The flight inspection technician is responsible for operating and monitoring the equipment used during the inspection, such as the theodolite. They play a crucial role in ensuring the accuracy and effectiveness of the flight inspection process.

27. (202) How can the localizer station be controlled?

Locally only.

Remote only.

Locally from the site or remotely from control tower or RAPCON.

Remotely from the site or locally from the control tower or RAPCON.

The localizer station can be controlled either locally from the site or remotely from the control tower or RAPCON. This means that the station can be operated and managed by personnel who are physically present at the site, or it can be controlled from a remote location such as a control tower or radar approach control (RAPCON) facility. This flexibility allows for efficient and effective management of the localizer station, ensuring accurate and reliable navigation guidance for aircraft.

Explanation

The localizer station can be controlled either locally from the site or remotely from the control tower or RAPCON. This means that the station can be operated and managed by personnel who are physically present at the site, or it can be controlled from a remote location such as a control tower or radar approach control (RAPCON) facility. This flexibility allows for efficient and effective management of the localizer station, ensuring accurate and reliable navigation guidance for aircraft.

28. (203) In the localizer, what frequency, in kilohertz (kHz), is the clearance (CLR) carrier transmitter?

Station assigned frequency (SAF) + 4.75.

SAF +4.00.

SAF -4.75.

SAF -4.00.

The correct answer is SAF -4.75. This is because the clearance (CLR) carrier transmitter frequency in the localizer is obtained by subtracting 4.75 kilohertz (kHz) from the station assigned frequency (SAF).

Explanation

The correct answer is SAF -4.75. This is because the clearance (CLR) carrier transmitter frequency in the localizer is obtained by subtracting 4.75 kilohertz (kHz) from the station assigned frequency (SAF).

29. (203) The hertz (Hz) frequency of the coded tone to provide the station identification (ID) is

770.

1,020.

1,410.

2,250.

The correct answer is 1,020. The question is asking for the hertz (Hz) frequency of the coded tone used for station identification (ID). Out of the given options, 1,020 is the only frequency that matches the criteria.

Explanation

The correct answer is 1,020. The question is asking for the hertz (Hz) frequency of the coded tone used for station identification (ID). Out of the given options, 1,020 is the only frequency that matches the criteria.

30. (203) What is a function of the dual power supply in the localizer?

Regulate line frequency.

Display various voltages.

Keep backup batteries charged.

Regulate alternating current (AC) power.

The dual power supply in the localizer is responsible for keeping the backup batteries charged. This ensures that there is a reliable power source in case of a power outage or failure. By keeping the backup batteries charged, the dual power supply ensures continuous operation of the localizer system even when the main power source is not available.

Explanation

The dual power supply in the localizer is responsible for keeping the backup batteries charged. This ensures that there is a reliable power source in case of a power outage or failure. By keeping the backup batteries charged, the dual power supply ensures continuous operation of the localizer system even when the main power source is not available.

31. (203) In a single-frequency localizer using 8 antennas, what is the sideband only (SBO) and carrier-plus sideband (CSB) phase relationship between the two antennas of each pair?

SBO in phase; CSB in phase.

SBO in phase; CSB 180° out of phase.

SBO 180° out of phase; CSB in phase.

SBO 180° out of phase; CSB 180° out of phase.

In a single-frequency localizer using 8 antennas, the sideband only (SBO) phase relationship between the two antennas of each pair is 180° out of phase, while the carrier-plus sideband (CSB) phase relationship is in phase. This means that the sidebands of each pair of antennas are 180° out of phase, while the carrier and sidebands are in phase.

Explanation

In a single-frequency localizer using 8 antennas, the sideband only (SBO) phase relationship between the two antennas of each pair is 180° out of phase, while the carrier-plus sideband (CSB) phase relationship is in phase. This means that the sidebands of each pair of antennas are 180° out of phase, while the carrier and sidebands are in phase.

32. (206)Which glide slope unit provides manual and automatic control for the station?

Monitor.

Transmitter.

Control unit.

Changeover unit.

The control unit is the glide slope unit that provides both manual and automatic control for the station. It is responsible for regulating and adjusting the glide slope signal to ensure that aircraft are properly guided during approach and landing. The control unit allows for precise control and can be operated either manually by the air traffic controller or automatically through the use of computer systems. It plays a crucial role in maintaining the accuracy and reliability of the glide slope system.

Explanation

The control unit is the glide slope unit that provides both manual and automatic control for the station. It is responsible for regulating and adjusting the glide slope signal to ensure that aircraft are properly guided during approach and landing. The control unit allows for precise control and can be operated either manually by the air traffic controller or automatically through the use of computer systems. It plays a crucial role in maintaining the accuracy and reliability of the glide slope system.

33. (216) Which flight inspection is generally unscheduled?

Commissioning.

Site evaluation.

Surveillance.

Periodic.

Surveillance flight inspections are generally unscheduled. Unlike commissioning, site evaluation, and periodic inspections, surveillance inspections are conducted randomly and without prior notice. These inspections are performed to monitor and ensure the ongoing safety and compliance of the aviation system, without giving the operators time to prepare or make any adjustments specifically for the inspection. This surprise element helps to provide a more accurate assessment of the system's overall performance and identify any potential issues or non-compliance that may be present during regular operations.

Explanation

Surveillance flight inspections are generally unscheduled. Unlike commissioning, site evaluation, and periodic inspections, surveillance inspections are conducted randomly and without prior notice. These inspections are performed to monitor and ensure the ongoing safety and compliance of the aviation system, without giving the operators time to prepare or make any adjustments specifically for the inspection. This surprise element helps to provide a more accurate assessment of the system's overall performance and identify any potential issues or non-compliance that may be present during regular operations.

34. (222) What is a transitory portion of the equipment historical file?

File record.

Facility record.

Federal facility file.

Certification documentation.

A transitory portion of the equipment historical file refers to the facility record. This record contains information about the equipment's history, including its maintenance, repairs, and any other relevant details. It serves as a documentation of the equipment's usage and condition over time, allowing for proper tracking and management.

Explanation

A transitory portion of the equipment historical file refers to the facility record. This record contains information about the equipment's history, including its maintenance, repairs, and any other relevant details. It serves as a documentation of the equipment's usage and condition over time, allowing for proper tracking and management.

35. (222) In the facility records, "Tab 1" contains what information?

Reference data.

Local ground check.

Facility certification.

Periodic flight inspection reports.

In facility records, "Tab 1" contains reference data. This means that Tab 1 contains information that serves as a point of reference or a source of information for the facility. It could include data such as charts, maps, manuals, or other materials that are used for informational purposes. This information is likely to be regularly accessed and consulted by the facility staff for various operational needs.

Explanation

In facility records, "Tab 1" contains reference data. This means that Tab 1 contains information that serves as a point of reference or a source of information for the facility. It could include data such as charts, maps, manuals, or other materials that are used for informational purposes. This information is likely to be regularly accessed and consulted by the facility staff for various operational needs.

36. (203) How many monitors must detect a fault to cause an equipment transfer in the localizer?

One.

Two.

Three.

Four.

Two monitors must detect a fault to cause an equipment transfer in the localizer. This means that there are multiple monitors in place to ensure the accuracy and reliability of the equipment. If only one monitor detects a fault, it may be considered as a false alarm or a temporary issue. However, if two monitors detect a fault simultaneously, it is more likely to be a genuine problem, and an equipment transfer is initiated to maintain the functionality and safety of the localizer.

Explanation

Two monitors must detect a fault to cause an equipment transfer in the localizer. This means that there are multiple monitors in place to ensure the accuracy and reliability of the equipment. If only one monitor detects a fault, it may be considered as a false alarm or a temporary issue. However, if two monitors detect a fault simultaneously, it is more likely to be a genuine problem, and an equipment transfer is initiated to maintain the functionality and safety of the localizer.

37. (203) In the localizer, when one carrier signal is routed to the antenna, the other carrier signal is routed to the

Control unit.

Dummy loads.

Changerover unit.

Distribution unit.

In the localizer, when one carrier signal is routed to the antenna, the other carrier signal is routed to the dummy loads. Dummy loads are used to absorb the excess power from the signal that is not being transmitted, preventing it from interfering with the transmitted signal. This helps to maintain signal integrity and minimize any interference or distortion.

Explanation

In the localizer, when one carrier signal is routed to the antenna, the other carrier signal is routed to the dummy loads. Dummy loads are used to absorb the excess power from the signal that is not being transmitted, preventing it from interfering with the transmitted signal. This helps to maintain signal integrity and minimize any interference or distortion.

38. (203) The left antennas at the localizer are fed a sideband only (SBO) signal that is at what degrees out of phase compared to the SBO signal fed to the right antennas?

0.

90.

180.

270.

The left antennas at the localizer are fed a sideband only (SBO) signal that is 180 degrees out of phase compared to the SBO signal fed to the right antennas.

Explanation

The left antennas at the localizer are fed a sideband only (SBO) signal that is 180 degrees out of phase compared to the SBO signal fed to the right antennas.

39. (203) What is the kilohertz (kHz) frequency of the clock pulse generated by the timing assembly in a localizer course monitor?

460.8.

500.8.

512.4.

602.5.

The correct answer is 460.8. The question asks for the kilohertz (kHz) frequency of the clock pulse generated by the timing assembly in a localizer course monitor. Out of the given options, 460.8 is the only one that represents a kilohertz frequency. Therefore, it is the correct answer.

Explanation

The correct answer is 460.8. The question asks for the kilohertz (kHz) frequency of the clock pulse generated by the timing assembly in a localizer course monitor. Out of the given options, 460.8 is the only one that represents a kilohertz frequency. Therefore, it is the correct answer.

40. (214) How many stationary columns does the tactical air navigation (TACAN) system antenna use to produce the radiation pattern?

16.

24.

36.

40.

The tactical air navigation (TACAN) system antenna uses 36 stationary columns to produce the radiation pattern.

Explanation

The tactical air navigation (TACAN) system antenna uses 36 stationary columns to produce the radiation pattern.

41. (215) When operating an instrument landing system (ILS) at category II, the pilot must be able to fly inbound to a point of interception where the localizer course line intersects the glide path at a point

Above the inner marker.

Above the middle marker.

Above the runway threshold.

Where the aircraft makes its touchdown on the runway.

When operating an instrument landing system (ILS) at category II, the pilot must be able to fly inbound to a point of interception where the localizer course line intersects the glide path at a point above the runway threshold. This means that the pilot needs to be able to align the aircraft with the runway and descend to the correct altitude above the threshold before landing. The threshold is the beginning of the runway, so flying above it ensures that the aircraft is properly aligned and prepared for landing.

Explanation

When operating an instrument landing system (ILS) at category II, the pilot must be able to fly inbound to a point of interception where the localizer course line intersects the glide path at a point above the runway threshold. This means that the pilot needs to be able to align the aircraft with the runway and descend to the correct altitude above the threshold before landing. The threshold is the beginning of the runway, so flying above it ensures that the aircraft is properly aligned and prepared for landing.

42. (217) During a localizer normal width run flight check, what level is not measured?

Course Width.

Identification.

Clearance.

Symmetry.

During a localizer normal width run flight check, various parameters are measured to ensure the accuracy of the localizer signal. These include course width, clearance, and symmetry. However, identification is not measured during this check. Identification refers to the ability of the localizer to accurately identify and transmit its unique identifier code. While this is an important aspect of the localizer's functionality, it is not specifically measured during a normal width run flight check.

Explanation

During a localizer normal width run flight check, various parameters are measured to ensure the accuracy of the localizer signal. These include course width, clearance, and symmetry. However, identification is not measured during this check. Identification refers to the ability of the localizer to accurately identify and transmit its unique identifier code. While this is an important aspect of the localizer's functionality, it is not specifically measured during a normal width run flight check.

43. (216) If a facility does not meet established tolerances within some specific locations of the service area, how does an inspector classify it?

Unusable.

Restricted.

Unreliable.

Unrestricted.

If a facility does not meet established tolerances within specific locations of the service area, an inspector would classify it as "restricted." This means that the facility is limited or constrained in its use due to not meeting the required standards or tolerances. It may still be usable in some capacity, but there are restrictions or limitations placed on its use.

Explanation

If a facility does not meet established tolerances within specific locations of the service area, an inspector would classify it as "restricted." This means that the facility is limited or constrained in its use due to not meeting the required standards or tolerances. It may still be usable in some capacity, but there are restrictions or limitations placed on its use.

44. (202) In megahertz (MHz), the frequency range of the transmitters in the localizer equipment station is

108 to 112.

324 to 336.

962 to 1,213.

2,250 to 2,259.

The correct answer is 108 to 112 MHz. This frequency range is the range of the transmitters in the localizer equipment station. The localizer equipment station is used in aviation for instrument landing systems (ILS) to provide horizontal guidance to pilots during approach and landing. The frequency range of 108 to 112 MHz is specifically allocated for the localizer equipment station and is used to transmit signals that help pilots align their aircraft with the runway centerline.

Explanation

The correct answer is 108 to 112 MHz. This frequency range is the range of the transmitters in the localizer equipment station. The localizer equipment station is used in aviation for instrument landing systems (ILS) to provide horizontal guidance to pilots during approach and landing. The frequency range of 108 to 112 MHz is specifically allocated for the localizer equipment station and is used to transmit signals that help pilots align their aircraft with the runway centerline.

45. (203) Why are the localizer course and clearance transmitter's output frequencies separated by 9.5 kilohertz (kHz)?

Accomodate the bandwidth of the combined signals.

Prevent incidental signal jamming.

Match aircraft receiver design.

Prevent signal combining.

The localizer course and clearance transmitter's output frequencies are separated by 9.5 kilohertz (kHz) to prevent signal combining. If the frequencies were not separated, they could interfere with each other and cause signal jamming or distortion. By keeping the frequencies separate, the signals can be transmitted and received without interference, ensuring clear communication and navigation for aircraft.

Explanation

The localizer course and clearance transmitter's output frequencies are separated by 9.5 kilohertz (kHz) to prevent signal combining. If the frequencies were not separated, they could interfere with each other and cause signal jamming or distortion. By keeping the frequencies separate, the signals can be transmitted and received without interference, ensuring clear communication and navigation for aircraft.

46. (203) Which localizer output would result in a change in the capture points from facility reference?

12 watt (W) Course (CRS) Carrier plus sideband (CSB).

200 milliwatt (mW) CRS sideband only (SBO).

10 W clearance (CLR) CSB.

15 W CRS CSB.

The localizer output that would result in a change in the capture points from facility reference is the 12 watt (W) Course (CRS) Carrier plus sideband (CSB). This output provides a stronger signal with both the carrier and sideband, which would allow for a more accurate capture of the localizer signal. The other options either have a lower power output or do not include both the carrier and sideband, which would not provide the same level of accuracy for capturing the localizer signal.

Explanation

The localizer output that would result in a change in the capture points from facility reference is the 12 watt (W) Course (CRS) Carrier plus sideband (CSB). This output provides a stronger signal with both the carrier and sideband, which would allow for a more accurate capture of the localizer signal. The other options either have a lower power output or do not include both the carrier and sideband, which would not provide the same level of accuracy for capturing the localizer signal.

47. (204) In the glide slope, which situation causes a fault condition and initiates equipment transfer?

Abnormal shelter temperature.

Abnormal primary power.

Single monitor alarms.

Dual monitor alarms.

Dual monitor alarms cause a fault condition and initiate equipment transfer in the glide slope. When both monitors detect an abnormal condition or alarm, it indicates a potential issue with the equipment. This prompts the system to transfer control to a backup or redundant system, ensuring the continued safe operation of the glide slope.

Explanation

Dual monitor alarms cause a fault condition and initiate equipment transfer in the glide slope. When both monitors detect an abnormal condition or alarm, it indicates a potential issue with the equipment. This prompts the system to transfer control to a backup or redundant system, ensuring the continued safe operation of the glide slope.

48. (202) What is the nominal carrier plus sideband (CSB) watt (W) output power of the clearance transmitter in the localizer?

10.

15.

20.

25.

The nominal carrier plus sideband (CSB) watt output power of the clearance transmitter in the localizer is 10.

Explanation

The nominal carrier plus sideband (CSB) watt output power of the clearance transmitter in the localizer is 10.

49. (203) What is the output frequency of the synthesized frequency source (SFS) in the localizer course transmitter?

Station assigned frequency (SAF).

55 kilohertz (kHz).

SAF +4.75 kHz.

SAF -4.75 kHz.

The output frequency of the synthesized frequency source (SFS) in the localizer course transmitter is the station assigned frequency (SAF) plus 4.75 kHz.

Explanation

The output frequency of the synthesized frequency source (SFS) in the localizer course transmitter is the station assigned frequency (SAF) plus 4.75 kHz.

50. (203) In a single-frequency localizer, using 8 or 14 antennas, the course width is maintained at 5.0° by

Increasing the transmitter sideband only (SBO) power output to the antennas.

Increasing the transmitter carrier-plus sideband (CSB) power output to the antennas.

De-phasing the SBO and increasing the CSB modulation percentage.

Tailoring the antenna power levels, a-spacing, and pair-to-pair phasing.

In a single-frequency localizer, the course width is maintained at 5.0° by tailoring the antenna power levels, a-spacing, and pair-to-pair phasing. This means that the power levels of the antennas are adjusted, the distance between the antennas (a-spacing) is optimized, and the phasing between pairs of antennas is adjusted. These adjustments ensure that the signals from the antennas combine in a way that creates a narrow course width of 5.0°, allowing for precise navigation along the desired course.

Explanation

In a single-frequency localizer, the course width is maintained at 5.0° by tailoring the antenna power levels, a-spacing, and pair-to-pair phasing. This means that the power levels of the antennas are adjusted, the distance between the antennas (a-spacing) is optimized, and the phasing between pairs of antennas is adjusted. These adjustments ensure that the signals from the antennas combine in a way that creates a narrow course width of 5.0°, allowing for precise navigation along the desired course.

51. (210) The very high frequency omni-directional and radio range (VOR) watt output power range of the carrier signal is

5 to 10.

10 to 25.

25 to 100.

50 to 150.

The correct answer is 25 to 100. VOR (Very High Frequency Omni-Directional Range) is a type of radio navigation system used by aircraft. The watt output power range of the carrier signal for VOR is typically between 25 and 100 watts. This power range allows for a strong and reliable signal to be transmitted over a significant distance, ensuring accurate navigation for pilots using VOR equipment.

Explanation

The correct answer is 25 to 100. VOR (Very High Frequency Omni-Directional Range) is a type of radio navigation system used by aircraft. The watt output power range of the carrier signal for VOR is typically between 25 and 100 watts. This power range allows for a strong and reliable signal to be transmitted over a significant distance, ensuring accurate navigation for pilots using VOR equipment.

52. (210) What is the operating megahertz (MHz) frequency range of the very high frequebcy Omni-directional and radio range (VOR) antenna?

100 to 120.

108 to 118.

110 to 116.

112 to 114.

The operating megahertz (MHz) frequency range of the very high frequency Omni-directional and radio range (VOR) antenna is 108 to 118.

Explanation

The operating megahertz (MHz) frequency range of the very high frequency Omni-directional and radio range (VOR) antenna is 108 to 118.

53. (202) What is the maximum miles per hour (mph) wind speed the localizer equipment station is designed to withstand?

50.

70.

90.

110.

The localizer equipment station is designed to withstand a maximum wind speed of 70 miles per hour (mph).

Explanation

The localizer equipment station is designed to withstand a maximum wind speed of 70 miles per hour (mph).

54. (202) What is the nominal carrier plus sideband (CSB) watt (W) output power of the course transmitter in the localizer?

10.

15.

20.

25.

The nominal carrier plus sideband (CSB) watt output power of the course transmitter in the localizer is 15.

Explanation

The nominal carrier plus sideband (CSB) watt output power of the course transmitter in the localizer is 15.

55. (203) What is the nominal clearance sideband only (SBO) milliwatt (mW) power in the localizer?

180.

300.

360.

450.

The nominal clearance sideband only (SBO) milliwatt (mW) power in the localizer is 300.

Explanation

The nominal clearance sideband only (SBO) milliwatt (mW) power in the localizer is 300.

56. (203) From where does the 90/150 hertz (Hz) control assembly in the clearance transmitter receiver its 90- and 150-Hz signals?

Changeover unit.

Local control unit.

Course transmitter.

Clearance monitor.

The 90/150 Hz control assembly in the clearance transmitter receiver its 90- and 150-Hz signals from the course transmitter.

Explanation

The 90/150 Hz control assembly in the clearance transmitter receiver its 90- and 150-Hz signals from the course transmitter.

57. (207) The unit that measures and checks the very high frequency onmi-directional and radio range (VOR) signals against established parameters is called the

Radio transmitter.

Radio transponder.

Radio frequency monitor.

Local and remote personal computer.

A radio frequency monitor is the unit that measures and checks the very high frequency onmi-directional and radio range (VOR) signals against established parameters. It is specifically designed to monitor and analyze the radio frequency signals emitted by VOR systems. A radio transmitter is responsible for transmitting signals, a radio transponder is used for receiving and transmitting signals, and a local and remote personal computer is not directly related to measuring and checking VOR signals.

Explanation

A radio frequency monitor is the unit that measures and checks the very high frequency onmi-directional and radio range (VOR) signals against established parameters. It is specifically designed to monitor and analyze the radio frequency signals emitted by VOR systems. A radio transmitter is responsible for transmitting signals, a radio transponder is used for receiving and transmitting signals, and a local and remote personal computer is not directly related to measuring and checking VOR signals.

58. (207) The very high frequency omni-directional and radio range (VOR) Power Supply 1A7 is an alternating current (AC) to direct current (DC) converter that supplies what operating DC voltage?

30.

35.

40.5.

45.5.

The VOR Power Supply 1A7 is an AC to DC converter that supplies an operating DC voltage of 40.5.

Explanation

The VOR Power Supply 1A7 is an AC to DC converter that supplies an operating DC voltage of 40.5.

59. (212) Which tactical air navigation (TACAN) system power supply output, in volts direct current, is over current and over voltage protected?

+10.

+17.5.

-17.5.

+65.

The correct answer is +65. The TACAN system power supply output is over current and over voltage protected at +65 volts direct current. This means that the power supply is designed to prevent damage or malfunction in the event of excessive current or voltage levels.

Explanation

The correct answer is +65. The TACAN system power supply output is over current and over voltage protected at +65 volts direct current. This means that the power supply is designed to prevent damage or malfunction in the event of excessive current or voltage levels.

60. (213) The tactical air navigation (TACAN) system radio frequency amplifier (RFA) produces a peak output of how many kilowatts (kW)?

2.

3.

4.

5.

The question asks about the peak output of the tactical air navigation (TACAN) system radio frequency amplifier (RFA) in kilowatts (kW). The correct answer is 3.

Explanation

The question asks about the peak output of the tactical air navigation (TACAN) system radio frequency amplifier (RFA) in kilowatts (kW). The correct answer is 3.

61. (213) What type failure is not provided by the TACAN SOLID STATE ANTENNA STATUS lines?

Soft.

Hard.

Clock.

Modulator.

The TACAN SOLID STATE ANTENNA STATUS lines provide information about different types of failures. Soft and hard failures refer to software and hardware malfunctions respectively. Clock failure indicates a problem with the timing system. However, the status lines do not provide information about modulator failure.

Explanation

The TACAN SOLID STATE ANTENNA STATUS lines provide information about different types of failures. Soft and hard failures refer to software and hardware malfunctions respectively. Clock failure indicates a problem with the timing system. However, the status lines do not provide information about modulator failure.

62. (203) Which parameter is not checked by the localizer course monitors?

Course.

Frequency difference.

Radio frequency (RF) level.

Identification (ID) precent modification.

The localizer course monitors are responsible for checking various parameters to ensure the accuracy and integrity of the localizer signal. These parameters include the course, radio frequency (RF) level, and identification (ID) percent modification. However, the parameter that is not checked by the localizer course monitors is the frequency difference. The frequency difference refers to the variance between the localizer frequency and the assigned frequency, and it is not within the scope of the localizer course monitors' responsibilities.

Explanation

The localizer course monitors are responsible for checking various parameters to ensure the accuracy and integrity of the localizer signal. These parameters include the course, radio frequency (RF) level, and identification (ID) percent modification. However, the parameter that is not checked by the localizer course monitors is the frequency difference. The frequency difference refers to the variance between the localizer frequency and the assigned frequency, and it is not within the scope of the localizer course monitors' responsibilities.

63. (203) The localizer clearance (CLR) signals are applied simultaneously to which antennas?

Entire array.

Middle.

Outer.

Inner.

The localizer clearance (CLR) signals are applied simultaneously to the inner antennas.

Explanation

The localizer clearance (CLR) signals are applied simultaneously to the inner antennas.

64. (203) What role do the localizer's sideband only (SBO) signals play in capturing the aircraft receiver?

They combine with the carrier plus sideband (CSB) and the stronger composite signal captures the receiver.

Secondary capture when within 1000 feet of touchdown.

The stronger of the captures the receiver.

Very little.

The localizer's sideband only (SBO) signals play a very minimal role in capturing the aircraft receiver. The stronger composite signal, which consists of the carrier plus sideband (CSB) signals, is primarily responsible for capturing the receiver. The SBO signals do not have a significant impact on this process.

Explanation

The localizer's sideband only (SBO) signals play a very minimal role in capturing the aircraft receiver. The stronger composite signal, which consists of the carrier plus sideband (CSB) signals, is primarily responsible for capturing the receiver. The SBO signals do not have a significant impact on this process.

65. (205) The glide slope carrier frequency is modulated with what percent of depth of modulation per tone?

20.

40.

70.

95.

The question is asking about the depth of modulation per tone for the glide slope carrier frequency. The correct answer is 40%. This means that the carrier frequency is modulated by 40% of its depth for each tone. This modulation affects the frequency of the carrier wave, allowing for the transmission of information.

Explanation

The question is asking about the depth of modulation per tone for the glide slope carrier frequency. The correct answer is 40%. This means that the carrier frequency is modulated by 40% of its depth for each tone. This modulation affects the frequency of the carrier wave, allowing for the transmission of information.

66. (205) Which hertz (Hz) signal is not an output status tone of the control unit?

705.

1,410.

2,350.

2,820.

The question asks for the hertz (Hz) signal that is not an output status tone of the control unit. The answer, 2,350 Hz, is the only option that does not correspond to a specific output status tone. Therefore, it is the correct answer.

Explanation

The question asks for the hertz (Hz) signal that is not an output status tone of the control unit. The answer, 2,350 Hz, is the only option that does not correspond to a specific output status tone. Therefore, it is the correct answer.

67. (206) In the glide slope, an alarm indication from the standby transmitter results in the

Main transmitter being turned on.

Standby transmitter being reset.

Transfer from standby to main.

Station being turned off.

When an alarm indication is received from the standby transmitter in the glide slope system, it indicates that there is a problem with the standby transmitter. In such cases, the system is designed to transfer from the standby transmitter to the main transmitter to ensure uninterrupted operation. However, in this question, the correct answer is "station being turned off." This suggests that when an alarm indication is received from the standby transmitter, instead of transferring to the main transmitter, the entire station is turned off.

Explanation

When an alarm indication is received from the standby transmitter in the glide slope system, it indicates that there is a problem with the standby transmitter. In such cases, the system is designed to transfer from the standby transmitter to the main transmitter to ensure uninterrupted operation. However, in this question, the correct answer is "station being turned off." This suggests that when an alarm indication is received from the standby transmitter, instead of transferring to the main transmitter, the entire station is turned off.

68. (207) The very high frequency omni-directional and radio range (VOR) unit that monitors the automatic ground check system is the

Radio transmitter.

Radio transponder.

Radio frequency monitor.

Local and remote personal computer.

The correct answer is radio frequency monitor. The VOR unit is responsible for monitoring the automatic ground check system, which requires a device that can monitor the radio frequencies used by the system. A radio transmitter is not the correct answer because it is responsible for transmitting signals, not monitoring them. A radio transponder is also not the correct answer as it is a device that receives and transmits signals, but it does not specifically monitor radio frequencies. A local and remote personal computer is not the correct answer as it is not specifically designed for monitoring radio frequencies.

Explanation

The correct answer is radio frequency monitor. The VOR unit is responsible for monitoring the automatic ground check system, which requires a device that can monitor the radio frequencies used by the system. A radio transmitter is not the correct answer because it is responsible for transmitting signals, not monitoring them. A radio transponder is also not the correct answer as it is a device that receives and transmits signals, but it does not specifically monitor radio frequencies. A local and remote personal computer is not the correct answer as it is not specifically designed for monitoring radio frequencies.

69. (207) How many monitor antenna probes does the very high frequency omni-directional and radio range (VOR) ground check kit contain?

4.

8.

12.

16.

The correct answer is 16. The VOR ground check kit contains 16 monitor antenna probes.

Explanation

The correct answer is 16. The VOR ground check kit contains 16 monitor antenna probes.

70. (208) The personal computer (PC) in the navigational system displays data from how many monitors?

1.

2.

3.

4.

The correct answer is 2. In a navigational system, the personal computer (PC) displays data from two monitors. This suggests that the PC is equipped with a dual-monitor setup, allowing for the simultaneous display of multiple data sources or information. Having two monitors can enhance the user's ability to monitor and analyze navigation-related data effectively.

Explanation

The correct answer is 2. In a navigational system, the personal computer (PC) displays data from two monitors. This suggests that the PC is equipped with a dual-monitor setup, allowing for the simultaneous display of multiple data sources or information. Having two monitors can enhance the user's ability to monitor and analyze navigation-related data effectively.

71. (211) The very high frequency omni-directional and radio range (VOR) batteries are "trickle charged" at what direct current (VDC)?

35.5.

39.5.

40.5.

45.5.

The correct answer is 40.5. This means that the VOR batteries are trickle charged at a direct current of 40.5 VDC. Trickle charging is a method of charging a battery at a low current rate to maintain its charge and prevent overcharging. In this case, the VOR batteries are charged at 40.5 VDC to ensure they are always ready for use and to prolong their lifespan.

Explanation

The correct answer is 40.5. This means that the VOR batteries are trickle charged at a direct current of 40.5 VDC. Trickle charging is a method of charging a battery at a low current rate to maintain its charge and prevent overcharging. In this case, the VOR batteries are charged at 40.5 VDC to ensure they are always ready for use and to prolong their lifespan.

72. (212) The tactical air navigation (TACAN) system can provide bearing and distance information for up to how many aircraft at any given time?

50.

100.

150.

200.

The TACAN system is capable of providing bearing and distance information for up to 100 aircraft at any given time. This means that it can simultaneously track and provide accurate location data for a maximum of 100 aircraft.

Explanation

The TACAN system is capable of providing bearing and distance information for up to 100 aircraft at any given time. This means that it can simultaneously track and provide accurate location data for a maximum of 100 aircraft.

73. (214) The microsecond (µs) spacing between the tactical air navigation (TACAN) system pulses in the X mode is

12.

24.

36.

48.

The microsecond spacing between the TACAN system pulses in the X mode is 12.

Explanation

The microsecond spacing between the TACAN system pulses in the X mode is 12.

74. (218) What glide slope flight inspection procedure checks phasing of the sideband only (SBO) signal in relationship to the carrier-plus sideband (CSB) signal?

Structure.

Modulation level.

Advance and retard.

Normal width/angle/symmetry.

The glide slope flight inspection procedure that checks the phasing of the sideband only (SBO) signal in relationship to the carrier-plus sideband (CSB) signal is the "Advance and retard" procedure. This procedure involves adjusting the timing of the SBO signal in relation to the CSB signal to ensure proper alignment and accuracy of the glide slope system.

Explanation

The glide slope flight inspection procedure that checks the phasing of the sideband only (SBO) signal in relationship to the carrier-plus sideband (CSB) signal is the "Advance and retard" procedure. This procedure involves adjusting the timing of the SBO signal in relation to the CSB signal to ensure proper alignment and accuracy of the glide slope system.

75. (203) Which unit is not tied into the control unit in the localizer?

Distribution unit.

Changeover unit.

Power supply unit.

Battery backup unit.

The distribution unit is not tied into the control unit in the localizer. The control unit is responsible for managing and controlling the localizer system, while the distribution unit is responsible for distributing power and signals to various components of the system. Therefore, the distribution unit is not directly connected to the control unit.

Explanation

The distribution unit is not tied into the control unit in the localizer. The control unit is responsible for managing and controlling the localizer system, while the distribution unit is responsible for distributing power and signals to various components of the system. Therefore, the distribution unit is not directly connected to the control unit.

76. (203) If an antenna cable is broken or shorted, it will cause

An abnormal indication.

A transmitter changeover.

A cable fault alarm.

A station shutdown.

If an antenna cable is broken or shorted, it will cause a station shutdown. This is because the antenna cable is responsible for transmitting and receiving signals between the antenna and the station equipment. If the cable is broken or shorted, it will disrupt the communication and prevent the station from functioning properly, leading to a shutdown.

Explanation

If an antenna cable is broken or shorted, it will cause a station shutdown. This is because the antenna cable is responsible for transmitting and receiving signals between the antenna and the station equipment. If the cable is broken or shorted, it will disrupt the communication and prevent the station from functioning properly, leading to a shutdown.

77. (203) What is the major difference in the localizer clearance (CLR) monitor and cource (CRS) monitor?

Measurement of the clearance (CLR) frequency.

Frequency of the radio frequency (RF) signals.

Digital readout assembly.

Timing pulse generated.

The major difference between the localizer clearance (CLR) monitor and course (CRS) monitor is the measurement they provide. The CLR monitor measures the frequency of the clearance (CLR) signal, while the CRS monitor measures the frequency of the course (CRS) signal.

Explanation

The major difference between the localizer clearance (CLR) monitor and course (CRS) monitor is the measurement they provide. The CLR monitor measures the frequency of the clearance (CLR) signal, while the CRS monitor measures the frequency of the course (CRS) signal.

78. (206) The Diode Switching Network (4A9) in the glide slope differs from the 4A9 in the localizer, when considering their length of line, because the glide slope is

Shorter than the localizer.

Two time that of the localizer.

Three times that of the localizer.

Four time that of the localizer.

The Diode Switching Network (4A9) in the glide slope differs from the 4A9 in the localizer in terms of their length of line. The answer states that the length of line in the glide slope is three times that of the localizer. This means that the physical distance covered by the diode switching network in the glide slope is three times longer than that in the localizer.

Explanation

The Diode Switching Network (4A9) in the glide slope differs from the 4A9 in the localizer in terms of their length of line. The answer states that the length of line in the glide slope is three times that of the localizer. This means that the physical distance covered by the diode switching network in the glide slope is three times longer than that in the localizer.

79. (207) What is the watts (W) output power level of the tactical air navigation (TACAN) radio frequency (RF) amplifiers?

100.

400.

1,000.

Over 3,000.

The question asks about the watts (W) output power level of the tactical air navigation (TACAN) radio frequency (RF) amplifiers. The correct answer is "Over 3,000." This suggests that the TACAN RF amplifiers have an output power level that exceeds 3,000 watts.

Explanation

The question asks about the watts (W) output power level of the tactical air navigation (TACAN) radio frequency (RF) amplifiers. The correct answer is "Over 3,000." This suggests that the TACAN RF amplifiers have an output power level that exceeds 3,000 watts.

80. (207) In case of primary power loss, how many hours will the very high frequency omni-directional and radio range (VOR) battery assembly can provide backup power?

2.

4.

6.

8.

The VOR battery assembly can provide backup power for 2 hours in case of primary power loss.

Explanation

The VOR battery assembly can provide backup power for 2 hours in case of primary power loss.

81. (211) The very high frequency Omni-directional and radio range (VOR) transmitter receives ON/OFF control signals from the

Control indicator.

Monitor front panel.

Digital computer front panel.

Remote maintenance work center.

The VOR transmitter receives ON/OFF control signals from the control indicator. This means that the control indicator is responsible for sending the necessary signals to turn the VOR transmitter on or off. The control indicator acts as a control interface for the VOR transmitter, allowing the user to manipulate its operation. The other options, such as the monitor front panel, digital computer front panel, and remote maintenance work center, are not directly involved in sending control signals to the VOR transmitter.

Explanation

The VOR transmitter receives ON/OFF control signals from the control indicator. This means that the control indicator is responsible for sending the necessary signals to turn the VOR transmitter on or off. The control indicator acts as a control interface for the VOR transmitter, allowing the user to manipulate its operation. The other options, such as the monitor front panel, digital computer front panel, and remote maintenance work center, are not directly involved in sending control signals to the VOR transmitter.

82. (216) A facility which is not safe, unreliable, or poses a hazard to navigation is classified as

Unusable.

Restricted.

Unreliable.

Unrestricted.

A facility that is not safe, unreliable, or poses a hazard to navigation is classified as unusable. This means that the facility cannot be used or relied upon due to its lack of safety and reliability, or the danger it poses to navigation. It is important to classify such facilities as unusable to ensure the safety and efficiency of navigation in the area.

Explanation

A facility that is not safe, unreliable, or poses a hazard to navigation is classified as unusable. This means that the facility cannot be used or relied upon due to its lack of safety and reliability, or the danger it poses to navigation. It is important to classify such facilities as unusable to ensure the safety and efficiency of navigation in the area.

83. (219) On the glide slope report, what field must be completed by the flight check crew in order for the graph to be plotted automatically?

1, Flight Inspection Report Header.

7, Instrument Landing System Data-Glide Slope (Part 1).

9, Instrument Landing System Data-Azimuth (Part 2).

11, Instrument Landing System Data-Transverse Plot.

The correct answer is 11, Instrument Landing System Data-Transverse Plot. This field must be completed by the flight check crew in order for the graph to be plotted automatically.

Explanation

The correct answer is 11, Instrument Landing System Data-Transverse Plot. This field must be completed by the flight check crew in order for the graph to be plotted automatically.

84. (221) The two categories that adjustments normally encountered during a flight inspection are divided into signal level and

Waveform.

Azimuth.

Voltage.

Power.

During a flight inspection, adjustments are typically divided into two categories: signal level and azimuth. Signal level adjustments involve controlling the strength of the signal being transmitted or received, while azimuth adjustments involve aligning the equipment to the correct angular direction. This is important for ensuring accurate navigation and communication during flight operations. Voltage and power adjustments are not directly related to the flight inspection process, making them incorrect choices.

Explanation

During a flight inspection, adjustments are typically divided into two categories: signal level and azimuth. Signal level adjustments involve controlling the strength of the signal being transmitted or received, while azimuth adjustments involve aligning the equipment to the correct angular direction. This is important for ensuring accurate navigation and communication during flight operations. Voltage and power adjustments are not directly related to the flight inspection process, making them incorrect choices.

85. (201) How many assemblies support each localizer antenna?

1.

2.

3.

4.

The correct answer is 2 because each localizer antenna is supported by two assemblies.

Explanation

The correct answer is 2 because each localizer antenna is supported by two assemblies.

86. (214) What is the total number of pulse pairs transmitted by the tactical air navigation (TACAN) system?

7,200.

5,400.

3,600.

1,440.

The total number of pulse pairs transmitted by the tactical air navigation (TACAN) system is 3,600. This means that over a certain period of time, the TACAN system sends out 3,600 pairs of pulses. This information is important for understanding the functioning and capabilities of the TACAN system.

Explanation

The total number of pulse pairs transmitted by the tactical air navigation (TACAN) system is 3,600. This means that over a certain period of time, the TACAN system sends out 3,600 pairs of pulses. This information is important for understanding the functioning and capabilities of the TACAN system.

87. (203) Localizer clearance carrier-plus sideband (CSB) and sideband only (SBO) signals are fed to which antennas?

Pairs 1-5.

Pairs 3-6.

Inner four pairs.

All antennas.

The localizer clearance carrier-plus sideband (CSB) and sideband only (SBO) signals are fed to pairs 1-5 antennas.

Explanation

The localizer clearance carrier-plus sideband (CSB) and sideband only (SBO) signals are fed to pairs 1-5 antennas.

88. (209) What hertz (Hz) frequency corresponds to a transmitter ON signal sent to the control indicator?

39.

47.

66.

74.

The correct answer is 47. In this question, the frequency of the transmitter ON signal sent to the control indicator is being asked. The given options are different frequencies expressed in hertz (Hz). Out of the given options, 47 Hz is the frequency that corresponds to the transmitter ON signal.

Explanation

The correct answer is 47. In this question, the frequency of the transmitter ON signal sent to the control indicator is being asked. The given options are different frequencies expressed in hertz (Hz). Out of the given options, 47 Hz is the frequency that corresponds to the transmitter ON signal.

89. (211) Each of the 18 battery cells in the very high frequency Omni-directional and radio range (VOR) battery assembly provides what volts direct current (VDC)?

2.0.

2.2.

2.5.

3.2.

Each of the 18 battery cells in the VOR battery assembly provides 2.2 volts direct current (VDC).

Explanation

Each of the 18 battery cells in the VOR battery assembly provides 2.2 volts direct current (VDC).

90. (216) In flight check terminology, slow excursions of the electromagnetic course or path are called

Course scalloping.

Alignment error.

Roughness.

Bends.

In flight check terminology, slow excursions of the electromagnetic course or path are called "bends". This term refers to small deviations or variations in the course or path that the electromagnetic signal takes during flight. It is used to describe gradual changes in the signal's trajectory, which can occur due to various factors such as atmospheric conditions or interference. The term "bends" is commonly used in aviation to describe these slow deviations and is an important concept for pilots to understand and account for during their flights.

Explanation

In flight check terminology, slow excursions of the electromagnetic course or path are called "bends". This term refers to small deviations or variations in the course or path that the electromagnetic signal takes during flight. It is used to describe gradual changes in the signal's trajectory, which can occur due to various factors such as atmospheric conditions or interference. The term "bends" is commonly used in aviation to describe these slow deviations and is an important concept for pilots to understand and account for during their flights.

91. (221) Which meter indicates reverse sensing from the very high frequency omni-directional and radio range (VOR)?

9,960.

To-from.

Crosspointer.

Automatic gain control (AGC).

The meter that indicates reverse sensing from the VOR is the "To-from" meter. This meter displays whether the aircraft is flying towards or away from the VOR station. Reverse sensing occurs when the pilot misinterprets the indications of the VOR receiver, causing the needle to move in the opposite direction of the desired course. The "To-from" meter helps the pilot determine the correct course by providing clear indications of whether they are flying towards or away from the VOR station.

Explanation

The meter that indicates reverse sensing from the VOR is the "To-from" meter. This meter displays whether the aircraft is flying towards or away from the VOR station. Reverse sensing occurs when the pilot misinterprets the indications of the VOR receiver, causing the needle to move in the opposite direction of the desired course. The "To-from" meter helps the pilot determine the correct course by providing clear indications of whether they are flying towards or away from the VOR station.

92. (221) Which meter indicates whether or not a sufficient radio frequency (RF) signal is being received from the very high frequency omni-directional and raido range (VOR) facility to make the readings on the aircraft indicators reliable?

Flag alarm.

Crosspointer.

Automatic gain control (AGC).

30 hertz (Hz) amplitude modulation (AM).

The correct answer is Automatic gain control (AGC). AGC is a feature in radio receivers that automatically adjusts the gain (amplification) of the received signal to maintain a consistent output level. In the context of receiving signals from a VOR facility, AGC ensures that the RF signal is strong enough to provide reliable readings on the aircraft indicators. It prevents the signal from being too weak or too strong, which could result in inaccurate readings. The AGC meter indicates whether the RF signal is sufficient for reliable readings, helping the pilot determine the quality of the received signal.

Explanation

The correct answer is Automatic gain control (AGC). AGC is a feature in radio receivers that automatically adjusts the gain (amplification) of the received signal to maintain a consistent output level. In the context of receiving signals from a VOR facility, AGC ensures that the RF signal is strong enough to provide reliable readings on the aircraft indicators. It prevents the signal from being too weak or too strong, which could result in inaccurate readings. The AGC meter indicates whether the RF signal is sufficient for reliable readings, helping the pilot determine the quality of the received signal.

93. (203) What is the minimum difference in depth of modulation (DDM) value that will be indicated outside the course width points in a single-frequency localizer using 14 antennas?

0.155.

0.175.

0.200.

0.240.

In a single-frequency localizer using 14 antennas, the minimum difference in depth of modulation (DDM) value that will be indicated outside the course width points is 0.200. This means that any DDM value below 0.200 will not be indicated outside the course width points.

Explanation

In a single-frequency localizer using 14 antennas, the minimum difference in depth of modulation (DDM) value that will be indicated outside the course width points is 0.200. This means that any DDM value below 0.200 will not be indicated outside the course width points.

94. (204) Which reference is not a monitored parameter in the null-reference glide slope?

Path difference in depth of modulation (DDM).

Identification percent of modulation.

Path radio frequency (RF) level.

Width DDM.

In the null-reference glide slope, the monitored parameters include path difference in depth of modulation (DDM), path radio frequency (RF) level, and width DDM. However, the identification percent of modulation is not a monitored parameter in this system.

Explanation

In the null-reference glide slope, the monitored parameters include path difference in depth of modulation (DDM), path radio frequency (RF) level, and width DDM. However, the identification percent of modulation is not a monitored parameter in this system.

95. (207) From initial fault detection, how long do the tactical air navigation (TACAN) monitors require to shut down the transmitter?

7 seconds.

14 seconds.

7 microseconds.

14 microseconds.

The TACAN monitors require 14 seconds to shut down the transmitter after initial fault detection.

Explanation

The TACAN monitors require 14 seconds to shut down the transmitter after initial fault detection.

96. (216) Which Air Force manual (AFMAN) contains tolerances and definitions used during a flight inspection?

11-222.

11-225.

11-252.

11-558.

AFMAN 11-225 is the correct answer because it contains the tolerances and definitions used during a flight inspection. This manual provides guidance and standards for conducting flight inspections, including the specifications and tolerances that must be met for various equipment and systems. It also includes definitions of key terms and procedures used during the inspection process.

Explanation

AFMAN 11-225 is the correct answer because it contains the tolerances and definitions used during a flight inspection. This manual provides guidance and standards for conducting flight inspections, including the specifications and tolerances that must be met for various equipment and systems. It also includes definitions of key terms and procedures used during the inspection process.

97. (206) The glide slope monitors uses exactly the same cards as the localizer course monitor except for the

Width clearance assembly.

Clearance difference assembly.

Near-field radiated pattern signal processor.

Near-field path signal processor and clearance assembly.

The glide slope monitors use the same cards as the localizer course monitor, except for the near-field path signal processor and clearance assembly. This means that all components of the glide slope monitors are the same as the localizer course monitor, except for this specific assembly.

Explanation

The glide slope monitors use the same cards as the localizer course monitor, except for the near-field path signal processor and clearance assembly. This means that all components of the glide slope monitors are the same as the localizer course monitor, except for this specific assembly.

98. (215) Instrument landing system (ILS) point A is located where in reference to the runway threshold?

Above.

2 nautical miles.

4 nautical miles.

5 to 7 nautical miles.

The Instrument Landing System (ILS) point A is located 4 nautical miles in reference to the runway threshold. This means that the point A is situated at a distance of 4 nautical miles from the beginning of the runway.

Explanation

The Instrument Landing System (ILS) point A is located 4 nautical miles in reference to the runway threshold. This means that the point A is situated at a distance of 4 nautical miles from the beginning of the runway.

99. (222) The publication containing detailed historical record guidance is

Technical Order (TO) 00-33A-1001, General Communications Activities Management Procedures and Practices Requirements.

TO 00-20-1, Aerospace Equipment Maintenance Inspection, Documentation, Policies, and Procedures.

Air Force Instruction (AFI) 21-116, Maintenance Management of Communications-Electronics.

TO 00-5-1, Air Force Technical Order System.

not-available-via-ai

Explanation

not-available-via-ai

100. (203) A basic function of the localizer radio frequency (RF) changeover unit is

Identifation (ID) generation.

RF generation.

IF measurement.

RF measurement.

The localizer radio frequency (RF) changeover unit is responsible for measuring the RF signal. This means that it is used to determine the characteristics and properties of the RF signal, such as its frequency, power, or modulation. It is not involved in identification (ID) generation, RF generation, or IF measurement.

Explanation

The localizer radio frequency (RF) changeover unit is responsible for measuring the RF signal. This means that it is used to determine the characteristics and properties of the RF signal, such as its frequency, power, or modulation. It is not involved in identification (ID) generation, RF generation, or IF measurement.

101. (203) Which parameter is not checked by the localizer course monitors?

Frequency separation.

Radio frequency (RF) level.

Identification (ID) percent modulation.

Width difference in depth of modulation (DDM).

The localizer course monitors are responsible for checking various parameters to ensure the accuracy and integrity of the localizer signal. These parameters include radio frequency (RF) level, identification (ID) percent modulation, and width difference in depth of modulation (DDM). However, frequency separation is not one of the parameters that the localizer course monitors check.

Explanation

The localizer course monitors are responsible for checking various parameters to ensure the accuracy and integrity of the localizer signal. These parameters include radio frequency (RF) level, identification (ID) percent modulation, and width difference in depth of modulation (DDM). However, frequency separation is not one of the parameters that the localizer course monitors check.

102. (206) In the null-reference glide slope, what signals are applied to the lower antenna?

Carrier-pluse sideband (CSB) and clearance (CLR).

Clearance (CLR) and sideband only (SBO).

Carrier-plus sideband (CSB) only.

Sideband only (SBO) only.

In the null-reference glide slope, only the Carrier-plus sideband (CSB) signal is applied to the lower antenna. The CSB signal is used to provide guidance to the aircraft during approach and landing. The other signals mentioned, such as clearance (CLR) and sideband only (SBO), are not applied to the lower antenna in this specific glide slope configuration.

Explanation

In the null-reference glide slope, only the Carrier-plus sideband (CSB) signal is applied to the lower antenna. The CSB signal is used to provide guidance to the aircraft during approach and landing. The other signals mentioned, such as clearance (CLR) and sideband only (SBO), are not applied to the lower antenna in this specific glide slope configuration.

103. (207) The tactical air navigation (TACAN) coded reply signals are used by aircraft to determine their

Direction to the runway.

Distance from the runway.

Direction to the ground station.

Distance from the ground station.

TACAN coded reply signals are used by aircraft to determine their distance from the ground station. TACAN is a navigation system that provides both direction and distance information to aircraft. The coded reply signals are sent by the ground station and received by the aircraft. By analyzing the signals, the aircraft can calculate its distance from the ground station. This information is crucial for pilots to accurately navigate and maintain safe distances during flight operations.

Explanation

TACAN coded reply signals are used by aircraft to determine their distance from the ground station. TACAN is a navigation system that provides both direction and distance information to aircraft. The coded reply signals are sent by the ground station and received by the aircraft. By analyzing the signals, the aircraft can calculate its distance from the ground station. This information is crucial for pilots to accurately navigate and maintain safe distances during flight operations.

104. (203) Which circuit card assembly in the localizer course (CRS) monitors process the voltage level that results from the predominant frequency difference in depth modulation (DDM) measurement?

Alarm.

Timing.

Measurement.

Digital readout.

The circuit card assembly in the localizer course (CRS) that monitors and processes the voltage level resulting from the predominant frequency difference in depth modulation (DDM) measurement is the Alarm circuit card assembly. This card assembly is responsible for detecting any anomalies or deviations in the voltage level and triggering an alarm if necessary. It plays a crucial role in ensuring the accuracy and reliability of the DDM measurement process.

Explanation

The circuit card assembly in the localizer course (CRS) that monitors and processes the voltage level resulting from the predominant frequency difference in depth modulation (DDM) measurement is the Alarm circuit card assembly. This card assembly is responsible for detecting any anomalies or deviations in the voltage level and triggering an alarm if necessary. It plays a crucial role in ensuring the accuracy and reliability of the DDM measurement process.

105. (204) What is the primary function of the control unit in the glide slope station?

Generates radio frequency (RF) signals.

Provides operating voltages.

Automatic control.

Monitoring.

The control unit in the glide slope station is responsible for automatic control. This means that it is in charge of regulating and adjusting the glide slope signals to ensure that the aircraft maintains the correct descent path during approach and landing. It automatically adjusts the glide slope signals based on the aircraft's position and altitude, allowing for a safe and accurate landing.

Explanation

The control unit in the glide slope station is responsible for automatic control. This means that it is in charge of regulating and adjusting the glide slope signals to ensure that the aircraft maintains the correct descent path during approach and landing. It automatically adjusts the glide slope signals based on the aircraft's position and altitude, allowing for a safe and accurate landing.

106. (209) What is the kilohertz (kHz) frequency of the alarm oscillator circuit in the coder and decoder (CODEC)?

4.

3.

2.

1.

The kilohertz (kHz) frequency of the alarm oscillator circuit in the coder and decoder (CODEC) is 1. This means that the alarm oscillator circuit operates at a frequency of 1 kHz.

Explanation

The kilohertz (kHz) frequency of the alarm oscillator circuit in the coder and decoder (CODEC) is 1. This means that the alarm oscillator circuit operates at a frequency of 1 kHz.

107. (213) In the very high frequency Omni-directional radio range (VOR) tactical air navigation (VORTAC) configuration, the tactical air navigation (TACAN) system monitor generates station Morse code identity when it receives?

VOR KEY INUT.

SERIAL INPUT DATA.

MORSE TRIGGER START.

400 watts (W) radio frequency (RF).

The correct answer is "VOR KEY INUT." This is because the tactical air navigation (TACAN) system monitor generates station Morse code identity when it receives the VOR KEY INUT.

Explanation

The correct answer is "VOR KEY INUT." This is because the tactical air navigation (TACAN) system monitor generates station Morse code identity when it receives the VOR KEY INUT.

108. (217) What is the flight check percentage tolerance for the localizer width check?

±17 of the engineered width.

±7.5 of the engineered width.

±17 of the commissioned width.

±7.5 of the commissioned width.

The flight check percentage tolerance for the localizer width check is ±17 of the commissioned width. This means that the actual width of the localizer can deviate by up to 17% from the commissioned width and still be considered within tolerance. This tolerance allows for some variation in the width of the localizer while still ensuring its accuracy and effectiveness in guiding aircraft during approach and landing.

Explanation

The flight check percentage tolerance for the localizer width check is ±17 of the commissioned width. This means that the actual width of the localizer can deviate by up to 17% from the commissioned width and still be considered within tolerance. This tolerance allows for some variation in the width of the localizer while still ensuring its accuracy and effectiveness in guiding aircraft during approach and landing.

109. (206) In the null-reference glide slope, what signal or signals are applied to the upper antenna?

Carrier-plus sideband (CSB) and clearance (CLR).

Clearance (CLR) and sideband only (SBO).

Carrier-plus sideband (CSB) only.

Sideband only (SBO) only.

not-available-via-ai

Explanation

not-available-via-ai

110. (209) Which of the following is a function of the coder and decoder (CODEC) section of the control indicator?

Control tactical air navigation (TACAN) transmit signal.

Covert return signals from the sites into status indications.

Convert transmit signals from the monitors into alarm tones.

Generate the very high frequency Omni-directional and radio range tactical air navigation (VORTAC) identification (ID) signal.

The function of the coder and decoder (CODEC) section of the control indicator is to covert return signals from the sites into status indications.

Explanation

The function of the coder and decoder (CODEC) section of the control indicator is to covert return signals from the sites into status indications.

111. (212) What parameter is not continuously monitored by the tactical air navigation (TACAN) system monitors?

Efficiency.

Reply delay.

Input pulse rate.

Antenna scan rate.

The TACAN system monitors various parameters to ensure efficient and accurate navigation. Efficiency refers to the system's ability to perform its functions effectively, so it is continuously monitored. Reply delay measures the time taken for the system to respond to a request, and antenna scan rate determines the speed at which the antenna scans for signals. However, the input pulse rate, which refers to the rate at which pulses are received by the system, is not continuously monitored.

Explanation

The TACAN system monitors various parameters to ensure efficient and accurate navigation. Efficiency refers to the system's ability to perform its functions effectively, so it is continuously monitored. Reply delay measures the time taken for the system to respond to a request, and antenna scan rate determines the speed at which the antenna scans for signals. However, the input pulse rate, which refers to the rate at which pulses are received by the system, is not continuously monitored.

112. (211) How many antennas sample the very high frequency Omni-directional and radio range (VOR) radiated signal and route the signals to the monitor?

10.

12.

14.

16.

The correct answer is 16 because the question is asking how many antennas sample the VOR radiated signal and route it to the monitor. VOR systems typically use 16 antennas, which are evenly spaced around a circular array, to sample the signal from different directions. These antennas then route the signals to the monitor, allowing for accurate navigation and direction finding.

Explanation

The correct answer is 16 because the question is asking how many antennas sample the VOR radiated signal and route it to the monitor. VOR systems typically use 16 antennas, which are evenly spaced around a circular array, to sample the signal from different directions. These antennas then route the signals to the monitor, allowing for accurate navigation and direction finding.

113. (220) What Federal Aviation Administration (FAA) flight check inspection report form is used for the tactical air navigation (TACAN)?

8040-2, Flight Inspection Report - VOR, VOR/DME, VORTAC, TACAN, VOT.

8240-2, Flight Inspection Report - VOR, VOR/DME, VORTAC, TACAN, VOT.

8240-2A, Flight Inspection Report - TACAN.

8241-2B, Flight Inspection Report - TACAN.

The correct answer is 8240-2, Flight Inspection Report - VOR, VOR/DME, VORTAC, TACAN, VOT. This is the correct form used by the Federal Aviation Administration (FAA) for the tactical air navigation (TACAN) system. The form includes the inspection report for VOR, VOR/DME, VORTAC, TACAN, and VOT systems.

Explanation

The correct answer is 8240-2, Flight Inspection Report - VOR, VOR/DME, VORTAC, TACAN, VOT. This is the correct form used by the Federal Aviation Administration (FAA) for the tactical air navigation (TACAN) system. The form includes the inspection report for VOR, VOR/DME, VORTAC, TACAN, and VOT systems.

114. (202) How many channels do the radios in the localizer equipment station have?

One.

Two.

Three.

Four.

The radios in the localizer equipment station have only one channel.

Explanation

The radios in the localizer equipment station have only one channel.

115. (216) The angular deviation required to produce a full-scale course deflection of the indicator on the airborne navigational instrument describes

Course scalloping.

Alignment error.

Course width.

Structure.

The angular deviation required to produce a full-scale course deflection of the indicator on the airborne navigational instrument describes the course width. This refers to the amount of deviation from the desired course that the indicator can display. It indicates the maximum angular deviation that the instrument can measure, providing a measure of the width of the course being flown.

Explanation

The angular deviation required to produce a full-scale course deflection of the indicator on the airborne navigational instrument describes the course width. This refers to the amount of deviation from the desired course that the indicator can display. It indicates the maximum angular deviation that the instrument can measure, providing a measure of the width of the course being flown.

116. (209) The visual status lamps on the control indicator display the

Actual status of the remote site.

Actual status of the control indicator.

Position of the START/STOP switch on the digital computer.

Position of the START/STOP switch on the control indicator.

The visual status lamps on the control indicator display the actual status of the remote site. This means that the lamps provide information about the current condition or state of the remote site, allowing the operator to monitor its status. The other options, such as the control indicator or the START/STOP switch, are not directly related to the remote site's status and therefore are not the correct answer.

Explanation

The visual status lamps on the control indicator display the actual status of the remote site. This means that the lamps provide information about the current condition or state of the remote site, allowing the operator to monitor its status. The other options, such as the control indicator or the START/STOP switch, are not directly related to the remote site's status and therefore are not the correct answer.

117. (221) The terminal very high frequency omni-directional and radio range (TVOR) must cover how many miles?

15.

20.

25.

30.

The correct answer is 25. The terminal very high frequency omni-directional and radio range (TVOR) must cover 25 miles.

Explanation

The correct answer is 25. The terminal very high frequency omni-directional and radio range (TVOR) must cover 25 miles.

118. (202) How many RF outputs are connected to the localizer antenna system for the course transmitter?

1.

2.

3.

4.

The localizer antenna system for the course transmitter is connected to two RF outputs.

Explanation

The localizer antenna system for the course transmitter is connected to two RF outputs.

119. (207) The unit of the very high frequency omni-directional and radio range (VOR) that provides a precision test generator used for system calibration is the

Digital computer

Radio transmitter.

Radio transponder.

Radio frequency monitor.

A digital computer is the unit of the very high frequency omni-directional and radio range (VOR) that provides a precision test generator used for system calibration. This means that a digital computer is responsible for generating precise test signals that are used to calibrate the VOR system. This ensures that the VOR system is functioning accurately and providing reliable navigation information. A digital computer is therefore an essential component in the calibration process of the VOR system.

Explanation

A digital computer is the unit of the very high frequency omni-directional and radio range (VOR) that provides a precision test generator used for system calibration. This means that a digital computer is responsible for generating precise test signals that are used to calibrate the VOR system. This ensures that the VOR system is functioning accurately and providing reliable navigation information. A digital computer is therefore an essential component in the calibration process of the VOR system.

120. (214) How many pulse pairs make up an auxiliary reference burst?

3.

6.

12.

24.

An auxiliary reference burst is a signal used in telecommunications to synchronize the receiver with the transmitter. It consists of a series of pulse pairs. The question asks how many pulse pairs make up the auxiliary reference burst, and the correct answer is 6. This means that the burst is made up of 6 pairs of pulses, which are used for synchronization purposes.

Explanation

An auxiliary reference burst is a signal used in telecommunications to synchronize the receiver with the transmitter. It consists of a series of pulse pairs. The question asks how many pulse pairs make up the auxiliary reference burst, and the correct answer is 6. This means that the burst is made up of 6 pairs of pulses, which are used for synchronization purposes.

121. (217) During a localizer low approach run flight check, what is the ± percent of the modulation level tolerance for a CAT I instrument landing system (ILS)?

.2.

.4.

2.

4.

During a localizer low approach run flight check, the ± percent of the modulation level tolerance for a CAT I instrument landing system (ILS) is 4. This means that the modulation level of the ILS signal can deviate by up to 4% from the specified value and still be considered within tolerance. This tolerance allows for minor variations in the signal strength, ensuring that the ILS system remains accurate and reliable during low approach run flight checks.

Explanation

During a localizer low approach run flight check, the ± percent of the modulation level tolerance for a CAT I instrument landing system (ILS) is 4. This means that the modulation level of the ILS signal can deviate by up to 4% from the specified value and still be considered within tolerance. This tolerance allows for minor variations in the signal strength, ensuring that the ILS system remains accurate and reliable during low approach run flight checks.

122. (220) Tactical air navigation (TACAN) coverage is considered satisfactory when a facility maintains continuous tracking, and course and distance information is in tolerance for how many miles?

25.

30.

35.

40.

TACAN coverage is considered satisfactory when a facility can continuously track and provide accurate course and distance information within a certain tolerance. In this case, the correct answer is 40 miles, which means that the facility can maintain accurate tracking and provide reliable course and distance information within a 40-mile radius.

Explanation

TACAN coverage is considered satisfactory when a facility can continuously track and provide accurate course and distance information within a certain tolerance. In this case, the correct answer is 40 miles, which means that the facility can maintain accurate tracking and provide reliable course and distance information within a 40-mile radius.

123. (221) To what depth percentage is the very high frequency omni-directional and radio range (VOR) carrier amplitude modulated by the sideband signals?

15.

20.

30.

40.

The correct answer is 30. In a very high frequency omni-directional and radio range (VOR) system, the carrier signal is amplitude modulated by the sideband signals to a depth of 30%. This means that the amplitude of the carrier signal is varied by 30% in order to encode the navigation information in the sidebands.

Explanation

The correct answer is 30. In a very high frequency omni-directional and radio range (VOR) system, the carrier signal is amplitude modulated by the sideband signals to a depth of 30%. This means that the amplitude of the carrier signal is varied by 30% in order to encode the navigation information in the sidebands.

124. (209) One function of the control indicator is to

Monitor status signals sent to the site.

Convert signals into control panel inputs.

Provide status indicator operating power.

Control the very high omni-directional and radio range tactical air navigation (VORTAC) monitoring system.

The control indicator is responsible for providing power to the status indicators. This means that it supplies the necessary operating power for the status indicators to function properly.

Explanation

The control indicator is responsible for providing power to the status indicators. This means that it supplies the necessary operating power for the status indicators to function properly.

3D156 CDC Vol. 2

1. (202) What are the modulation frequencies in the localizer course transmitter?

2.

What first name or nickname would you like us to use?

2. (203) An 18.5 percent modulation difference converted to difference in depth of modulation (DDM) is

3. (201) The localizer equipment shelter is generally painted what colors?

4. (202) The localizer station is designed for what type of operation?

5. (203) What is the capture effect principle in reference to the localizer?

6. (203) If during a ground check you are taking a measurement from the 35° survey checkpoint, where on the airfield are you located?

7. (216) In reference to flight inspection, the supervisor makes sure all possible ground calibration and checking are done

8. (203) In the localizer, what frequency, in kilohertz (kHz), is the course (CRS) carrier transmitter?

9. (203) How does the kilohertz (kHz) output frequency of the localizer clearance transmitter compare to the assigned localizer station frequency?

10. (208) What is the primary method of operator control and monitoring of the very high frequency omni-directional and radio range (VOR) Navigational Set?

11. (216) Which flight inspection is required if there is a major equipment modification or an accident?

12. (216) A facility which meets all tolerances and is fully usable within its service area is classified as

13. (221) A very high frequency omni-directional and radio range (VOR) that meets all operating tolerances is classified as

14. (222) How often are historical files reviewed?

15. (203) What is the first basic operation of the localizer station?

16. (203) How many log-periodic dipole antennas (LPD) are there in the localizer antenna array?

17. (203) In watts (W) and milliwatts (mW) respectively, what is the nominal localizer course transmitter carrier-plus sideband (CSB) and sideband only (SBO) power?

18. (203) Which unit of the localizer course transmitter provides a means of suppressing the carrier in the sideband only (SBO)?

19. (203) What provides samples of the localizer radiated signals to the radio frequency (RF) combining network?

20. (203) Which monitor assembly displays the measured parameters?

21. (203) Which localizer signal characteristic does not affect the difference in depth of modulation (DDM)?

22. (207) What is one purpose of the squitter pulses transmitted from the TACAN?

23. (208) In the navigational system, the personal computer (PC) display is divided into how many main windows?

24. (214) What assembly in the tactical air navigation (TACAN) system antenna modulation generator contains the system clock and trigger circuits?

25. (216) Of the flight check personnel, who is often referred to as the panel operator?

26. (216) Of the flight check personnel, who do you usually talk to over the radio during a flight inspection?

27. (202) How can the localizer station be controlled?

28. (203) In the localizer, what frequency, in kilohertz (kHz), is the clearance (CLR) carrier transmitter?

29. (203) The hertz (Hz) frequency of the coded tone to provide the station identification (ID) is

30. (203) What is a function of the dual power supply in the localizer?

31. (203) In a single-frequency localizer using 8 antennas, what is the sideband only (SBO) and carrier-plus sideband (CSB) phase relationship between the two antennas of each pair?

32. (206)Which glide slope unit provides manual and automatic control for the station?

33. (216) Which flight inspection is generally unscheduled?

34. (222) What is a transitory portion of the equipment historical file?

35. (222) In the facility records, "Tab 1" contains what information?

36. (203) How many monitors must detect a fault to cause an equipment transfer in the localizer?

37. (203) In the localizer, when one carrier signal is routed to the antenna, the other carrier signal is routed to the

38. (203) The left antennas at the localizer are fed a sideband only (SBO) signal that is at what degrees out of phase compared to the SBO signal fed to the right antennas?

39. (203) What is the kilohertz (kHz) frequency of the clock pulse generated by the timing assembly in a localizer course monitor?

40. (214) How many stationary columns does the tactical air navigation (TACAN) system antenna use to produce the radiation pattern?

41. (215) When operating an instrument landing system (ILS) at category II, the pilot must be able to fly inbound to a point of interception where the localizer course line intersects the glide path at a point

42. (217) During a localizer normal width run flight check, what level is not measured?

43. (216) If a facility does not meet established tolerances within some specific locations of the service area, how does an inspector classify it?

44. (202) In megahertz (MHz), the frequency range of the transmitters in the localizer equipment station is

45. (203) Why are the localizer course and clearance transmitter's output frequencies separated by 9.5 kilohertz (kHz)?

46. (203) Which localizer output would result in a change in the capture points from facility reference?

47. (204) In the glide slope, which situation causes a fault condition and initiates equipment transfer?

48. (202) What is the nominal carrier plus sideband (CSB) watt (W) output power of the clearance transmitter in the localizer?

49. (203) What is the output frequency of the synthesized frequency source (SFS) in the localizer course transmitter?

50. (203) In a single-frequency localizer, using 8 or 14 antennas, the course width is maintained at 5.0° by

51. (210) The very high frequency omni-directional and radio range (VOR) watt output power range of the carrier signal is

52. (210) What is the operating megahertz (MHz) frequency range of the very high frequebcy Omni-directional and radio range (VOR) antenna?

53. (202) What is the maximum miles per hour (mph) wind speed the localizer equipment station is designed to withstand?

54. (202) What is the nominal carrier plus sideband (CSB) watt (W) output power of the course transmitter in the localizer?

55. (203) What is the nominal clearance sideband only (SBO) milliwatt (mW) power in the localizer?

56. (203) From where does the 90/150 hertz (Hz) control assembly in the clearance transmitter receiver its 90- and 150-Hz signals?

57. (207) The unit that measures and checks the very high frequency onmi-directional and radio range (VOR) signals against established parameters is called the

58. (207) The very high frequency omni-directional and radio range (VOR) Power Supply 1A7 is an alternating current (AC) to direct current (DC) converter that supplies what operating DC voltage?

59. (212) Which tactical air navigation (TACAN) system power supply output, in volts direct current, is over current and over voltage protected?

60. (213) The tactical air navigation (TACAN) system radio frequency amplifier (RFA) produces a peak output of how many kilowatts (kW)?

61. (213) What type failure is not provided by the TACAN SOLID STATE ANTENNA STATUS lines?

62. (203) Which parameter is not checked by the localizer course monitors?

63. (203) The localizer clearance (CLR) signals are applied simultaneously to which antennas?

64. (203) What role do the localizer's sideband only (SBO) signals play in capturing the aircraft receiver?

65. (205) The glide slope carrier frequency is modulated with what percent of depth of modulation per tone?

66. (205) Which hertz (Hz) signal is not an output status tone of the control unit?

67. (206) In the glide slope, an alarm indication from the standby transmitter results in the

68. (207) The very high frequency omni-directional and radio range (VOR) unit that monitors the automatic ground check system is the

69. (207) How many monitor antenna probes does the very high frequency omni-directional and radio range (VOR) ground check kit contain?

70. (208) The personal computer (PC) in the navigational system displays data from how many monitors?

71. (211) The very high frequency omni-directional and radio range (VOR) batteries are "trickle charged" at what direct current (VDC)?

72. (212) The tactical air navigation (TACAN) system can provide bearing and distance information for up to how many aircraft at any given time?

73. (214) The microsecond (µs) spacing between the tactical air navigation (TACAN) system pulses in the X mode is

74. (218) What glide slope flight inspection procedure checks phasing of the sideband only (SBO) signal in relationship to the carrier-plus sideband (CSB) signal?

75. (203) Which unit is not tied into the control unit in the localizer?

76. (203) If an antenna cable is broken or shorted, it will cause

77. (203) What is the major difference in the localizer clearance (CLR) monitor and cource (CRS) monitor?