3D156 Vol 2 : Airfield Systems Trivia Questions! Quiz
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The localizer equipment shelter is generally painted what colors?
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International orange and white
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Olive drab and black
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Brown and tan
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Red and white
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Explore the technical details of airfield systems in '3D156 Vol 2: Airfield Systems Trivia Questions!' This quiz assesses knowledge on localizer equipment, frequencies, and operational controls, crucial for professionals in aerospace and air traffic management.
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- 2.
In megahertz (MHz), the frequency range of the transmitters in the localizer equipment station is
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108 to 112
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324 to 336
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962 to 1,213
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2,250 to 2,259
Correct Answer
A. 108 to 112Explanation
The correct answer is 108 to 112 MHz. This frequency range is used in the transmitters of the localizer equipment station. The localizer is a component of the instrument landing system (ILS) used in aviation to guide aircraft during the approach and landing phases. The frequency range of 108 to 112 MHz is specifically allocated for the localizer function, ensuring accurate and reliable navigation for aircraft.Rate this question:
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- 3.
How many monitors must fail or detect a fault for the tactical air navigation (TACAN) system to shutdown?
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One
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Two
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Three
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Four
Correct Answer
A. TwoExplanation
The TACAN system will shutdown if two monitors fail or detect a fault. This suggests that the system has a redundancy mechanism in place, where it can tolerate the failure of one monitor but not two. This ensures that the system remains operational and reliable, as multiple monitors are required to ensure accurate navigation information.Rate this question:
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- 4.
How can the localizer station be controlled?
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Local only
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Remote only
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Locally from the site or remotely from the control tower or radar approach control (RAPCON)
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Remotely from the site or locally from the control tower of RAPCON
Correct Answer
A. Locally from the site or remotely from the control tower or radar approach control (RAPCON)Explanation
The localizer station can be controlled either locally from the site or remotely from the control tower or radar approach control (RAPCON). This means that the station can be operated and managed by personnel on-site, as well as by operators located in the control tower or RAPCON. This flexibility allows for efficient control and coordination of the localizer station, ensuring safe and accurate navigation for aircraft.Rate this question:
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- 5.
The hertz (Hz) frequency of the coded tone to provide the station identification (ID) is
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770
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1,020
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1,410
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2,250
Correct Answer
A. 1,020Explanation
The hertz (Hz) frequency of the coded tone to provide the station identification (ID) is 1,020. This means that the tone used for station identification is produced at a frequency of 1,020 hertz.Rate this question:
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- 6.
In the localizer, what frequency, in kilohertz (kHz), is the clearance (CLR) carrier transmitted?
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Station assigned frequency (SAF) + 4.75
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SAF+4.00
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SAF -4.75
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SAF -4.00
Correct Answer
A. SAF -4.75Explanation
The clearance (CLR) carrier is transmitted at a frequency that is 4.75 kilohertz (kHz) lower than the station assigned frequency (SAF).Rate this question:
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- 7.
Which monitor assembly displays the measured parameters?
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Signal processor
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Digital readout
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Measurement
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Timing
Correct Answer
A. Digital readoutExplanation
The digital readout is the monitor assembly that displays the measured parameters. It is a device that shows the numerical values of the measurements in a digital format, making it easier for users to read and interpret the data. The signal processor, measurement, and timing are not directly responsible for displaying the measured parameters.Rate this question:
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- 8.
In the localizer, what frequency, in kilohertz (kHz), is the course (CRS) carrier transmitted?
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Station assigned frequency (SAF) + 4.00
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SAF +4.75
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SAF -4.00
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SAF -4.75
Correct Answer
A. SAF +4.75Explanation
The course (CRS) carrier is transmitted at a frequency that is 4.75 kilohertz (kHz) higher than the station assigned frequency (SAF).Rate this question:
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- 9.
How many monitors must detect a fault to cause an equipment transfer in the localizer?
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One
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Two
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Three
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Four
Correct Answer
A. TwoExplanation
In the localizer system, a fault is detected when two monitors detect the fault simultaneously. This redundancy ensures that false alarms are minimized and that a fault is confirmed before triggering an equipment transfer. Therefore, two monitors must detect a fault to cause an equipment transfer in the localizer.Rate this question:
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- 10.
Of the flight check personnel, who is often referred to as the panel operator?
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Pilot
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Theodolite operator
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Flight inspection pilot
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Flight inspection technician
Correct Answer
A. Flight inspection technicianExplanation
The flight inspection technician is often referred to as the panel operator among the flight check personnel.Rate this question:
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- 11.
Which flight inspection is required if there is a major equipment modification or an accident?
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Commissioning
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Site evaluation
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Surveillance
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Special
Correct Answer
A. SpecialExplanation
When 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 the repaired equipment is functioning properly and meets the necessary safety standards. It is a thorough inspection that is carried out to assess the performance and reliability of the equipment in order to ensure the safety of the aircraft and its passengers.Rate this question:
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- 12.
In the glide slope, what happens if the main transmitter is on and both monitors detect a radiated fault?
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Main transmitter is turned off and standby transmitter is turned on.
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Main transmitter and standby transmitter are turned off.
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Main transmitter is turned off and back on.
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Main transmitter is turned off only.
Correct Answer
A. Main transmitter is turned off and standby transmitter is turned on.Explanation
If both monitors detect a radiated fault, it means that there is a problem with the main transmitter. In order to ensure the accuracy and safety of the glide slope, the main transmitter needs to be turned off. At the same time, the standby transmitter is turned on to take over the transmission of the glide slope signal. This ensures that the glide slope remains functional and reliable even in the event of a fault with the main transmitter.Rate this question:
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- 13.
Which of the following adjustments are air traffic control (ATC) personnel allowed to make to the control indicator?
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Operating power
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Transmitter frequency
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Volume control of the audio
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Transponder identification (ID) ON/OFF control
Correct Answer
A. Volume control of the audioExplanation
Air traffic control (ATC) personnel are allowed to make adjustments to the volume control of the audio on the control indicator. This allows them to adjust the volume of the audio communication between the ATC personnel and the pilots. By having control over the audio volume, ATC personnel can ensure clear and effective communication with pilots, especially in noisy or busy environments. This adjustment helps maintain a safe and efficient air traffic control system.Rate this question:
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- 14.
If an aircraft receives signals from two ground beacons operating on the same frequency
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The weaker signal is almost totally rejected.
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Co-channel interference will block the airborne receiver
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The distance and the azimuth to the farther station will be displayed to the pilot.
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The two signals will saturate the receiver and cause the bearing indicator to hunt.
Correct Answer
A. The weaker signal is almost totally rejected.Explanation
When an aircraft receives signals from two ground beacons operating on the same frequency, the weaker signal is almost totally rejected. This means that the aircraft's receiver will prioritize the stronger signal and ignore the weaker one. This is important because it helps to ensure that the aircraft receives accurate and reliable signals, as the weaker signal may be distorted or unreliable due to factors such as distance or interference. By rejecting the weaker signal, the aircraft can maintain a strong and clear connection with the ground beacon.Rate this question:
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- 15.
An aircraft mishap would most likely result in what type of facility certification?
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Annual
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Special
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Periodic
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Repair/adjustment
Correct Answer
A. SpecialExplanation
An aircraft mishap would most likely result in a special facility certification because it requires a specific and unique set of skills and equipment to handle the repairs and adjustments necessary after an accident. This certification ensures that the facility is qualified to handle the specialized needs of an aircraft that has been involved in a mishap.Rate this question:
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- 16.
What is the nominal carrier plus sideband (CSB) watt (W) output power of the clearance transmitter in the localizer?
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10
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15
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20
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25
Correct Answer
A. 10Explanation
The nominal carrier plus sideband (CSB) watt output power of the clearance transmitter in the localizer is 10 watts.Rate this question:
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- 17.
Which unit of the localizer course transmitter provides a means of suppressing the carrier in the sideband only (SBO)?
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Exciter
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Modulator assembly
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Identification keyer
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Diode-switching network
Correct Answer
A. Diode-switching networkExplanation
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 means that it allows the transmitter to transmit the sideband signals without the carrier signal, which can help in reducing interference and improving the quality of the transmitted signal. The exciter, modulator assembly, and identification keyer are not specifically designed for this purpose.Rate this question:
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- 18.
What is the null-reference glide slope’s nominal power, in watts and milliwatts respectively, for the carrier-plus-sideband (CSB) and sideband only (SBO)?
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.33, .45
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3.3, 4.5
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3.3, .45
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3, 45
Correct Answer
A. 3, 45 -
- 19.
The personal computer (PC) displays data from how many monitors?
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One
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Two
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Three
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Four
Correct Answer
A. TwoExplanation
A personal computer (PC) can display data from two monitors. This means that it has the capability to connect and use two separate monitors simultaneously. This can be useful for multitasking or for expanding the screen real estate for better productivity. With two monitors, users can have multiple windows or applications open at the same time, allowing for easier organization and access to information.Rate this question:
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- 20.
The microsecond (s) spacing between the tactical air navigation (TACAN) system pulses in the X mode is
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12
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24
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36
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48
Correct Answer
A. 12Explanation
The microsecond spacing between the TACAN system pulses in the X mode is 12. This means that there is a 12 microsecond time gap between each pulse transmitted by the TACAN system. This information is important for accurately measuring and determining distances and bearings in the X mode.Rate this question:
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- 21.
In kilohertz (kHz), what is the frequency difference between the localizer course (CRS) and the clearance (CLR) radio frequency (RF) signals?
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Stationed assigned frequency (SAF) + 4.75
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SAF -4.75
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4.75
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9.5
Correct Answer
A. 9.5Explanation
The frequency difference between the localizer course (CRS) and the clearance (CLR) radio frequency (RF) signals is 9.5 kHz.Rate this question:
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- 22.
The tactical air navigation (TACAN) system can provide bearing and distance information for up to how many aircraft at any given time?
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50
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100
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150
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200
Correct Answer
A. 100Explanation
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. This is an important capability for air traffic control and military operations, as it allows for efficient and effective monitoring and coordination of multiple aircraft in a given airspace.Rate this question:
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- 23.
What is connected to the local personal computer (PC) to interface it with the remote PC?
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Modem
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Optical interface
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Control indicator
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Radio frequency monitor
Correct Answer
A. ModemExplanation
A modem is connected to the local personal computer (PC) to interface it with the remote PC. A modem is a device that converts digital signals from the computer into analog signals that can be transmitted over telephone lines or other communication channels. It allows the computer to connect to the internet or communicate with other remote computers. Modems are commonly used for dial-up internet connections or for connecting to remote networks.Rate this question:
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- 24.
What is the operating megahertz (MHz) frequency range of the very high frequency omni- directional and radio range (VOR) antenna?
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100 to 120
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108 to 118
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110 to 116
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112 to 114
Correct Answer
A. 108 to 118Explanation
The operating megahertz (MHz) frequency range of the very high frequency omni-directional and radio range (VOR) antenna is 108 to 118. This range allows the VOR antenna to receive and transmit signals within this frequency range, which is commonly used for aviation navigation purposes.Rate this question:
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- 25.
How many channels do the radios in the localizer equipment station have?
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One
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Two
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Three
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Four
Correct Answer
A. OneExplanation
The radios in the localizer equipment station have only one channel.Rate this question:
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- 26.
What is the nominal carrier plus sideband (CSB) watt (W) output power of the course transmitter in the localizer?
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10
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15
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20
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25
Correct Answer
A. 15Explanation
The nominal carrier plus sideband (CSB) watt output power of the course transmitter in the localizer is 15.Rate this question:
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- 27.
Which parameter is not checked by the localizer course monitors?
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Course width
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Frequency difference
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Radio frequency (RF) level
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Identification (ID) percent modulation
Correct Answer
A. Frequency differenceExplanation
The localizer course monitors check various parameters to ensure the accuracy of the localizer signal. These parameters include course width, radio frequency (RF) level, and identification (ID) percent modulation. However, the parameter that is not checked by the localizer course monitors is the frequency difference.Rate this question:
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- 28.
In watts (W) and milliwatts (mW) respectively, what is the nominal localizer course transmitter carrier-plus sideband (CSB) and sideband only (SBO) power?
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15,360
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10,300
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5,190
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3,190
Correct Answer
A. 15,360 -
- 29.
The left antennas at the localizer are fed sideband only (SBO) signals that is at what degrees out of phase compared to the SBO fed to the right antenna?
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0
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90
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180
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270
Correct Answer
A. 180Explanation
The left antennas at the localizer are fed sideband only (SBO) signals that are 180 degrees out of phase compared to the SBO fed to the right antenna.Rate this question:
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- 30.
When might a single frequency localizer be installed?
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When the localizer is installed on a category I airfield.
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When the localizer is installed on a category III airfield.
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When a dual-frequency localizer would cause interference.
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When the forward terrain is free of major obstructions and terrain problems.
Correct Answer
A. When the forward terrain is free of major obstructions and terrain problems.Explanation
A single frequency localizer might be installed when the forward terrain is free of major obstructions and terrain problems. This is because a single frequency localizer relies on a clear line of sight between the aircraft and the ground-based transmitter. If there are major obstructions or terrain problems, it could interfere with the signal and affect the accuracy of the localizer. Therefore, it is important to ensure that the forward terrain is clear before installing a single frequency localizer.Rate this question:
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- 31.
Of the flight check personnel, who do you usually talk to over the radio during a flight inspection?
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Pilot.
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Theodolite operator.
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Flight inspection pilot.
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Flight inspection technician.
Correct Answer
A. Flight inspection technician.Explanation
During a flight inspection, the flight check personnel communicate with the flight inspection technician over the radio. The flight inspection technician is responsible for monitoring and analyzing the data collected during the flight inspection, ensuring the accuracy and safety of the flight. They work closely with the pilot and the theodolite operator to coordinate and execute the inspection process effectively.Rate this question:
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- 32.
Which tactical air navigation (TACAN) system power supply output, in volts direct current, is over current and over voltage protected?
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+10
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+17.5
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-17.5
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+65
Correct Answer
A. +65Explanation
The correct answer is +65 volts. This option is the only one that mentions over current and over voltage protection. This implies that the TACAN system power supply output of +65 volts is designed to prevent damage from excessive current or voltage, ensuring the safety and functionality of the system.Rate this question:
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- 33.
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?
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SBO is in phase; CSB is in phase
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SBO is in phase; CSB is 180° of phase
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SBO is 180° out of phase; CSB is in phase
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SBO is 180° out of phase; CSB is 180° out of phase.
Correct Answer
A. SBO is 180° out of phase; CSB is in phaseExplanation
The correct answer states that the sideband only (SBO) is 180° out of phase, while the carrier-plus sideband (CSB) is in phase. This means that the two antennas of each pair are producing signals that are exactly opposite in phase for the sideband only, while they are producing signals that are in phase for the carrier-plus sideband. This phase relationship allows for the separation and detection of the sideband and carrier signals in the localizer system.Rate this question:
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- 34.
Which parameter is not checked by the localizer course monitors?
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Frequency separation
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Radio frequency (RF) level
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Identification (ID) percent modulation
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Width difference in depth of modulation (DDM)
Correct Answer
A. Frequency separationExplanation
The localizer course monitors check various parameters to ensure the accuracy of the localizer signal. However, frequency separation is not one of the parameters that they monitor. The frequency separation refers to the difference in frequency between the localizer and the glide slope signals, which is typically 4.25 MHz. This parameter is crucial for maintaining the correct alignment and guidance of the aircraft during approach and landing.Rate this question:
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- 35.
What is the kilohertz (kHz) frequency of the clock pulse generated by the timing assembly in a localizer course monitor?
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460.8
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500.8
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512.4
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602.5
Correct Answer
A. 460.8Explanation
The correct answer is 460.8. This suggests that the kilohertz frequency of the clock pulse generated by the timing assembly in a localizer course monitor is 460.8 kHz.Rate this question:
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- 36.
Which hertz (Hz) signal is not an output status tone of the control unit?
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705
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1,410
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2,350
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2,820
Correct Answer
A. 2,350Explanation
The given question asks for a hertz (Hz) signal that is not an output status tone of the control unit. The options provided are 705, 1,410, 2,350, and 2,820. Since the question asks for a signal that is not an output status tone, we can assume that the other three options are output status tones. Therefore, the correct answer is 2,350.Rate this question:
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- 37.
The very high frequency Omni-directional and radio range (VOR) Power Supply 1A7 is an AC to DC converter that supplies what operating direct current (DC) voltage?
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30
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35
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40.5
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45.5
Correct Answer
A. 40.5Explanation
The VOR Power Supply 1A7 is an AC to DC converter that supplies an operating direct current (DC) voltage of 40.5 volts.Rate this question:
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- 38.
The very high frequency Omni-directional and radio range (VOR) watt output power range of the carrier signal is
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5 to 10
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10 to 25
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25 to 100
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50 to 150
Correct Answer
A. 25 to 100Explanation
The VOR watt output power range of the carrier signal is 25 to 100. This means that the watt output power of the VOR signal can range from 25 watts to 100 watts.Rate this question:
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- 39.
A very high frequency omni-directional and radio range (VOR) that meets all operating tolerances is classified as
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Unusable
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Restricted
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Satisfactory
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Unrestricted
Correct Answer
A. UnrestrictedExplanation
A VOR that meets all operating tolerances is classified as unrestricted because it is fully functional and can be used without any limitations or restrictions.Rate this question:
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- 40.
From where does the 90/150 hertz (Hz) control assembly in the clearance transmitter receive its 90- and 150-Hz signals?
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Changeover unit
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Local control unit
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Course transmitter
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Clearance monitor
Correct Answer
A. Course transmitterExplanation
The 90/150 Hz control assembly in the clearance transmitter receives its 90- and 150-Hz signals from the course transmitter.Rate this question:
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- 41.
When the aircraft is on the glide path, the airborne indicator shows what deflection?
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Nominal 5 microamps
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Nominal 1 microamp
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Minimum
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None
Correct Answer
A. NoneExplanation
The question is asking about the deflection shown on the airborne indicator when the aircraft is on the glide path. The correct answer is "none" because when the aircraft is on the glide path, there should be no deflection shown on the airborne indicator. This indicates that the aircraft is properly aligned with the glide path and is descending at the correct rate.Rate this question:
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- 42.
On the facility certification form, what information do you place in the “comments” block?
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Why you did certification, what you did, and results of comparison with reference data.
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Remote flight check data and the results of the comparison with the reference data.
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Local flight check data and the results of the comparison with the reference data.
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Signature of the certifier and the recorded meter readings from the baseline.
Correct Answer
A. Why you did certification, what you did, and results of comparison with reference data.Explanation
The "comments" block on the facility certification form should include information about why the certification was done, what was done during the certification process, and the results of the comparison with reference data. This is important for documentation purposes and to provide a comprehensive overview of the certification process.Rate this question:
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- 43.
What controls the localizer clearance (CLR) transmitters?
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Control unit
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Changeover unit
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Clearance monitors
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Course transmitters
Correct Answer
A. Course transmittersExplanation
The localizer clearance (CLR) transmitters are controlled by the course transmitters. Course transmitters are responsible for transmitting the correct course information to the CLR transmitters, which then transmit the signals to aircraft to guide them along the correct approach path. The course transmitters ensure that the CLR transmitters are accurately aligned with the runway's centerline, allowing for precise navigation during approach and landing.Rate this question:
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- 44.
The glide slope carrier frequency is modulated with what percent of the depth of modulation per tone?
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20
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40
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70
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95
Correct Answer
A. 40Explanation
The correct answer is 40. In a glide slope system, the carrier frequency is modulated to provide guidance to aircraft during approach and landing. The depth of modulation per tone refers to the amount by which the carrier frequency is varied. A depth of modulation of 40 percent means that the carrier frequency is modulated by 40 percent of its original frequency. This modulation allows for precise and accurate guidance to the aircraft, ensuring a safe landing.Rate this question:
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- 45.
In the null-reference glide slope, what signal or signals are applied to the upper antenna?
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Carrier-plus sideband (CSB) and clearance (CLR).
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Clearance (CLR) and sideband only (SBO).
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Carrier-plus sideband (CSB) only.
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Sideband only (SBO) only.
Correct Answer
A. Sideband only (SBO) only. -
- 46.
When utilizing either of the personal computers (PC), which of the following operations can the operator perform?
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Turn the transmitter on or off
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Turn on the control indicator
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Power-up the system
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Bypass monitors
Correct Answer
A. Bypass monitorsExplanation
The operator can bypass monitors when utilizing a personal computer.Rate this question:
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- 47.
When operating an instrument landing system (ILS) as 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
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Above the inner marker
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Above the middle marker
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Above the runway threshold
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Where the aircraft makes its touchdown on the runway
Correct Answer
A. Above the runway thresholdExplanation
When operating an instrument landing system (ILS) as 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 maintain the correct approach path and altitude until they reach the point where the runway begins. The runway threshold is the starting point of the runway, so flying above it ensures that the aircraft is aligned with the runway and ready to make a safe touchdown.Rate this question:
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- 48.
What glide slope flight inspection procedure checks phasing of the sideband only (SBO) signal in relationship to the carrier-plus sideband (CSB) signal?
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Structure
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Modulation level
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Advance and retard
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Normal width/angle/symmetry
Correct Answer
A. Advance and retardExplanation
The advance and retard procedure is used to check the phasing of the sideband only (SBO) signal in relation to the carrier-plus sideband (CSB) signal during glide slope flight inspection. This procedure involves adjusting the modulation level to determine if the SBO signal is leading or lagging behind the CSB signal. By doing so, the technician can ensure that the signals are properly aligned, which is crucial for accurate glide slope readings.Rate this question:
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- 49.
How many main windows is the personal computer (PC) display divided into?
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One
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Two
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Three
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Four
Correct Answer
A. TwoExplanation
A personal computer (PC) display is typically divided into two main windows. This allows users to multitask and have multiple applications or documents open simultaneously. Having two main windows helps improve productivity and efficiency by allowing users to easily switch between different tasks or programs without having to close or minimize windows.Rate this question:
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Mar 21, 2023Quiz Edited by
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