2A354C Volume 3 - Comm/Nav/Penetration AIDS

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    What is the transmitter power output for the AN/ARC-164Have Quick II UHF Radio?

    • 5 watts
    • 10 watts
    • 15 watts
    • 20 watts
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About This Quiz

This quiz focuses on the AN\/ARC-164 Have Quick II UHF Radio, assessing knowledge on its power output, channel availability, warmup time, frequency programming, and Time of Day setup. Essential for learners in communications and military technology fields.

2A354C Volume 3 - Comm/Nav/Penetration AIDS - Quiz

Quiz Preview

  • 2. 

    How many channels are available for the AN/ARC-164 Have Quick II UHF Radio

    • 5,000

    • 6,000

    • 7,000

    • 8,000

    Correct Answer
    A. 7,000
    Explanation
    The AN/ARC-164 Have Quick II UHF Radio has 7,000 channels available.

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  • 3. 

    What is the warmup time for the AN/ARC - 164 Have Quick II UHF Radio

    • 5 seconds

    • 7 seconds

    • 10 seconds

    • 15 seconds

    Correct Answer
    A. 10 seconds
    Explanation
    The warmup time for the AN/ARC - 164 Have Quick II UHF Radio is 10 seconds.

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  • 4. 

    What is used to program the frequency hopping pattern and rate for the AN/ARC - 164 Have Quick II UHF Radio

    • Net Number

    • Time of Day (TOD)

    • Word of Day (WOD)

    • Time of Week (TOW)

    Correct Answer
    A. Word of Day (WOD)
    Explanation
    The Word of Day (WOD) is used to program the frequency hopping pattern and rate for the AN/ARC-164 Have Quick II UHF Radio. The WOD is a specific word or code that is used to synchronize the frequency hopping sequence between the transmitting and receiving radios. By programming the WOD, the radios can ensure that they are hopping frequencies in a coordinated and secure manner, preventing interception or jamming of the communication. The WOD is typically changed daily to enhance security and prevent unauthorized access to the communication.

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  • 5. 

    Time of Day (TOD) for the UHF radio can be established by

    • Turning the radio on, setting the TOD switch to the official mode and loading the TOD

    • A universal coordinated time hack with the global positioning satellite

    • Setting all clocks AF wide at a specific time each day

    • Receipt from ground/tower/radar approach control (RAPCON)

    Correct Answer
    A. Receipt from ground/tower/radar approach control (RAPCON)
    Explanation
    The correct answer is receipt from ground/tower/radar approach control (RAPCON). This means that the Time of Day (TOD) for the UHF radio can be established by receiving the time information from the ground, tower, or radar approach control. This information is likely to be accurate and synchronized with the official time, allowing the radio to be set accordingly.

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  • 6. 

    What does the status switch on the UHF radio indicate?

    • Status of the UHF radio

    • Status of the UHF frequencies

    • Alternate display and hold for 5 seconds

    • Alternate display and hold for 10 seconds

    Correct Answer
    A. Alternate display and hold for 5 seconds
    Explanation
    The status switch on the UHF radio indicates that it will alternate its display and hold that display for 5 seconds. This means that the radio will continuously switch between different information or settings on its display, and each display will be held for 5 seconds before switching to the next one.

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  • 7. 

    what display would you get on the Have Quick II, phase II UHF radio, if there was no WOD loaded

    • BAD

    • ERROR

    • INVALID

    • No display

    Correct Answer
    A. BAD
    Explanation
    If there is no WOD (Word Of the Day) loaded on the Have Quick II, phase II UHF radio, the display would show "BAD". This indicates that the radio is unable to perform its functions properly without the necessary WOD.

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  • 8. 

    where is the secure voice control panel on the f-16

    • Right console near the ecm panel

    • Right console near the lighting panel

    • Left console near the lighting panel

    • Left console near the ecm panel

    Correct Answer
    A. Right console near the lighting panel
    Explanation
    The secure voice control panel on the F-16 is located on the right console near the lighting panel.

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  • 9. 

    what is the unique feature of the dual seat KY-58 interface

    • Aft cockpit volume controls

    • Forward cockpit volume controls

    • Both cockpits are set to a preset volume

    • Both cockpits have independent volume controls

    Correct Answer
    A. Both cockpits have independent volume controls
    Explanation
    The unique feature of the dual seat KY-58 interface is that both cockpits have independent volume controls. This means that each cockpit can adjust the volume of the interface according to their own preference, allowing for individual customization and ensuring optimal audio experience for both pilots.

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  • 10. 

    On the KY-58 secure voice system, what controls the received messages for code/radio (C/RAD) 1 and 2

    • Audio 1 panel

    • Audio 2 panel

    • Comm 1 on the UFC

    • Volume control on the secure voice panel

    Correct Answer
    A. Audio 1 panel
    Explanation
    The received messages for code/radio (C/RAD) 1 and 2 on the KY-58 secure voice system are controlled by the audio 1 panel.

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  • 11. 

    what is the power requirement for the KY-58 secure voice system and how is it applied

    • 26 VDC; through a 5 amp cb

    • 28 VDC; through a 5 amp cb

    • 26 VDC; through a 10 amp cb

    • 28VDC; through a 10 amp cb

    Correct Answer
    A. 28 VDC; through a 5 amp cb
    Explanation
    The power requirement for the KY-58 secure voice system is 28 VDC. It is applied through a 5 amp circuit breaker.

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  • 12. 

    what are the mode switch positions on the KY-58 secure voice control panel 

    • OFF, operational (OP), and load (LD)

    • OFF, baseband (BB), and diphase (DP)

    • Operational (OP), load (LD), and receive variable (RV)

    • Receive variable (RV), baseband (BB), and diphase (DP

    Correct Answer
    A. Operational (OP), load (LD), and receive variable (RV)
    Explanation
    The mode switch positions on the KY-58 secure voice control panel are operational (OP), load (LD), and receive variable (RV). These positions allow the user to switch between different modes of operation, such as activating the device for normal operation (OP), loading new settings or configurations (LD), and adjusting the receive variable (RV) for optimal performance.

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  • 13. 

    what are the two positions of the filtered switch on the secure voice processor 

    • IN and OUT

    • ON and OFF

    • Load and plain

    • Load and verify

    Correct Answer
    A. IN and OUT
    Explanation
    The correct answer for the two positions of the filtered switch on the secure voice processor is "IN and OUT." This suggests that the switch can be toggled between the "IN" position to allow input or signal to enter the secure voice processor and the "OUT" position to enable the output or signal to exit the secure voice processor.

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  • 14. 

    the Z-AHQ adapter allows the f16 to use the 

    • KY-28 in place of the KY-58

    • KY-38 in place of the KY-58

    • KY-58 in place of the KY-28

    • KY-58 in place of the KY-38

    Correct Answer
    A. KY-58 in place of the KY-28
    Explanation
    The Z-AHQ adapter allows the f16 to use the KY-58 in place of the KY-28.

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  • 15. 

    on the f16, the intercommunication amp contains

    • A power gain switch, air refuel signal amp, a voice message unit (VMU) drive

    • VMU, VMU drive, power gain control, and a resistive audio mixing network

    • An aerial refuel signal amp, mic relay, comms matrix, and a filter assembly

    • A mic headset amp, resistive audio mixing network, mic relay, and a power gain control switch

    Correct Answer
    A. A mic headset amp, resistive audio mixing network, mic relay, and a power gain control switch
    Explanation
    The correct answer is a mic headset amp, resistive audio mixing network, mic relay, and a power gain control switch. This is because the intercommunication amp on the F16 includes components such as a mic headset amp, which amplifies the audio signal from the microphone, a resistive audio mixing network, which combines multiple audio signals, a mic relay, which switches between different microphones, and a power gain control switch, which allows the user to adjust the amplification level of the audio signal.

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  • 16. 

    you are experiencing a lot of crackling in the headset of the f16.  In view of this, you should check the 

    • Headsets

    • Filter assembly

    • Interphone amp

    • Comms matrix

    Correct Answer
    A. Filter assembly
    Explanation
    The crackling in the headset of the F16 could be caused by a faulty or clogged filter assembly. The filter assembly is responsible for removing any unwanted noise or interference in the communication system. If it is not functioning properly, it can lead to crackling sounds in the headset. Therefore, checking the filter assembly would be a logical step in troubleshooting and resolving the issue.

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  • 17. 

    the intercom control amp consists of a mic and headset amp, a resistive audio mixing network, a mic relay, and a 

    • Volume control

    • Squelch control

    • Filter assembly

    • Gain control

    Correct Answer
    A. Volume control
    Explanation
    The intercom control amp consists of various components including a mic and headset amp, a resistive audio mixing network, a mic relay, and a volume control. The volume control allows the user to adjust the volume of the audio output from the intercom system. This is important as it allows the user to set the audio level to a comfortable and audible level.

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  • 18. 

    on the f16, where is the VMU for the inter phone system?

    • Behind the pilots seat

    • In front of the pilots seat

    • Under the left console

    • Under the right console

    Correct Answer
    A. Under the right console
    Explanation
    The VMU (Voice Management Unit) for the interphone system on the F16 is located under the right console. This means that it is positioned below the right side of the control panel or dashboard in the cockpit of the aircraft.

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  • 19. 

    where is the intercom amp in the D-model f16

    • Under the aft seat

    • Left of the console

    • Right of the console

    • Behind the pilot seat

    Correct Answer
    A. Under the aft seat
    Explanation
    The intercom amp in the D-model F16 is located under the aft seat.

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  • 20. 

    what are the operating controls for the intercom system

    • MIC switch and intercom volume switch on the AUDIO 2 panel

    • MIC switch and HOT MIC volume control on the audio 1 panel

    • HOT MIC switch and HOT MIC volume control on the audio 1 panel

    • HOT MIC switch and intercom volume control on the audio 1 panel

    Correct Answer
    A. HOT MIC switch and intercom volume control on the audio 1 panel
    Explanation
    The correct answer is HOT MIC switch and intercom volume control on the audio 1 panel. This answer is correct because the question is asking for the operating controls for the intercom system, and the HOT MIC switch and intercom volume control on the audio 1 panel are the specific controls that are used to operate the intercom system. The other options mentioned are either incorrect or do not pertain to the intercom system.

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  • 21. 

    where are the received audio signals, warning tones, and radio transmissions routed before they are sent to the intercom amp and operator headset

    • Audio 1 panel

    • Audio 2 panel

    • Comms audio panel

    • Comms matrix assembly

    Correct Answer
    A. Comms matrix assembly
    Explanation
    The received audio signals, warning tones, and radio transmissions are routed to the comms matrix assembly before being sent to the intercom amp and operator headset. The comms matrix assembly acts as a central hub for managing and distributing audio signals in a communication system. It allows for seamless switching and routing of different audio sources, ensuring that the correct signals are sent to the appropriate destinations.

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  • 22. 

    what two systems give a Morse Code input the f16 interphone system

    • TACAN and ILS

    • TACAN and IFF

    • Radar Bomb Scoring (RBS) and ILS

    • RBS and IFF

    Correct Answer
    A. TACAN and ILS
    Explanation
    TACAN and ILS are the two systems that give a Morse Code input to the f16 interphone system. These systems are commonly used in aviation for navigation and communication purposes. TACAN (Tactical Air Navigation) provides distance and bearing information, while ILS (Instrument Landing System) assists in precision landing approaches. Both systems can transmit Morse Code signals as part of their communication protocols, allowing the f16 interphone system to receive and interpret Morse Code inputs.

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  • 23. 

    on the f16 ARC-210 UHF/VHF radio, when transmission is initiated, to which position is the mic switch placed

    • AFT

    • FWD

    • Inboard

    • Outboard

    Correct Answer
    A. FWD
    Explanation
    On the F16 ARC-210 UHF/VHF radio, when transmission is initiated, the mic switch is placed in the FWD position.

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  • 24. 

    on the ARC-210, what component splits outgoing VHF transmissions into transmitted frequencies and routes the signals to the correct antenna

    • VHF AM antenna

    • VHF FM antenna

    • VHF frequency diplexer

    • UHF/VHF antenna selector

    Correct Answer
    A. VHF frequency diplexer
    Explanation
    The VHF frequency diplexer is the component on the ARC-210 that splits outgoing VHF transmissions into transmitted frequencies and routes the signals to the correct antenna. A diplexer is a device that combines or separates different frequency bands, and in this case, it is specifically designed for VHF frequencies. This allows for efficient transmission and reception of VHF signals on the ARC-210 system.

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  • 25. 

    if the pilot wants to assign a new frequency to a preset channel on the ARC-210, what switch would be depressed

    • COM 1

    • COM 2

    • M-SEL

    • PRESET

    Correct Answer
    A. COM 2
    Explanation
    To assign a new frequency to a preset channel on the ARC-210, the pilot would depress the COM 2 switch. This suggests that the ARC-210 has multiple communication channels, COM 1 and COM 2. By depressing the COM 2 switch, the pilot can access and modify the preset channel associated with that specific communication channel.

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  • 26. 

    the AIBU interfaces with TACAN

    • IFF, FCR, RTWS, and ECM

    • INS, FCR, RTWS, IFF, and ECM

    • SMS, FCR, RTWS, IFF, and ECM

    • SMS, FCR, RTWS, IFF, INS, and ECM

    Correct Answer
    A. IFF, FCR, RTWS, and ECM
    Explanation
    The correct answer is IFF, FCR, RTWS, and ECM. This answer is correct because it includes the correct combination of systems that interface with AIBU. IFF (Identification Friend or Foe) is a system used for identifying friendly or enemy aircraft. FCR (Fire Control Radar) is a radar system used for tracking and targeting enemy aircraft. RTWS (Radar Threat Warning System) is a system used for detecting and warning against radar threats. ECM (Electronic Countermeasures) is a system used for disrupting enemy radar and communications. Therefore, this combination of systems accurately represents the interfaces with AIBU.

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  • 27. 

    When the ARC-210 is transmitting at 243 MHz, what mode of operation is being used

    • Guard

    • Cipher

    • Anti-Jam

    • Maritime

    Correct Answer
    A. Guard
    Explanation
    When the ARC-210 is transmitting at 243 MHz, the mode of operation being used is Guard.

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  • 28. 

    if the f16 SATCOM setup is automatic and no channel login is required, what SATCOM mode of operation is being used

    • 25K demand assigned multiple access (DAMA)

    • Demand assigned single access (DASA

    • 5K DAMA

    • Dedicated

    Correct Answer
    A. Dedicated
    Explanation
    The given answer "Dedicated" is correct because if the F16 SATCOM setup is automatic and no channel login is required, it means that the system is dedicated to a specific channel or frequency and does not require any assignment or sharing of resources. In a dedicated mode of operation, the communication link is exclusively reserved for a single user or purpose, ensuring uninterrupted and secure communication. This mode is suitable for situations where constant and reliable communication is required without the need for dynamic allocation of resources.

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  • 29. 

    the AIBU communicates with the GAC over the 

    • AMUX bus

    • BMUX bus

    • CMUX bus

    • DMUX bus

    Correct Answer
    A. BMUX bus
    Explanation
    The correct answer is BMUX bus. The AIBU (Analog Input Buffer Unit) communicates with the GAC (Governor Automatic Control) over the BMUX bus. This means that the AIBU and GAC exchange data and information using the BMUX bus as the communication channel.

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  • 30. 

    the AIBU is operational anytime power is applied to 

    • SMS

    • GAC

    • Both the GAC and SMS

    • The aircraft

    Correct Answer
    A. The aircraft
    Explanation
    The AIBU (Auxiliary Interface Bus Unit) is operational whenever power is applied to the aircraft. This means that regardless of whether power is applied to the SMS (Satellite Management System), the GAC (Generator Control Unit), or both, the AIBU will still function as long as power is supplied to the aircraft.

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  • 31. 

    AIBU faults are reported to the 

    • UFC

    • GAC

    • SMS

    • AICU

    Correct Answer
    A. GAC
    Explanation
    AIBU faults are reported to the GAC.

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  • 32. 

    What TO contains procedures for AIBU install and removal 

    • 99JG-00-1

    • 99JG-10-1

    • 99JG-20-1

    • 99JG-30-1

    Correct Answer
    A. 99JG-20-1
    Explanation
    The correct answer, 99JG-20-1, likely contains the procedures for installing and removing AIBU (Assistive Intelligence and Behavior Understanding) software. This particular code seems to be specifically related to the installation and removal processes, as indicated by the numbers "20" in the code. The other codes listed may be related to different aspects or procedures of AIBU, but 99JG-20-1 is the most relevant for the given question.

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  • 33. 

    what info does TACAN provide to the aircrew

    • Altitude, relative bearing, and slant range

    • Slant range, altitude, and station identify tone

    • Altitude, relative bearing, and station identify tone

    • Slant range, relative bearing, and station identify tone

    Correct Answer
    A. Slant range, relative bearing, and station identify tone
    Explanation
    TACAN (Tactical Air Navigation) provides the aircrew with information regarding slant range, relative bearing, and station identify tone. Slant range refers to the distance between the aircraft and the TACAN station, while relative bearing indicates the direction of the station relative to the aircraft. The station identify tone helps the aircrew identify the specific TACAN station they are receiving signals from.

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  • 34. 

    name the locations of TACAN stations

    • Ground, space, and airborne

    • Ground, shipboard, and space

    • Space, shipboard, and airborne

    • Ground, airborne, and shipboard

    Correct Answer
    A. Ground, airborne, and shipboard
    Explanation
    The correct answer is ground, airborne, and shipboard. TACAN (Tactical Air Navigation) stations are used for navigation purposes and can be located on the ground, in the air (airborne), or on ships (shipboard). These stations provide distance and bearing information to aircraft equipped with TACAN receivers, allowing them to determine their position relative to the station.

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  • 35. 

    In TACAN terms, relative bearing is the

    • Location of a TACAN station in relation to magnetic north

    • Angular distance between the TACAN station and the aircraft

    • Straight-line distance between TACAN station and the aircraft

    • Directional position of the aircraft in relation to a known TACAN station

    Correct Answer
    A. Directional position of the aircraft in relation to a known TACAN station
    Explanation
    The term "relative bearing" in TACAN refers to the directional position of the aircraft in relation to a known TACAN station. It indicates the angle between the aircraft's heading and the line connecting the aircraft to the TACAN station. This information is crucial for pilots to determine their position and navigate accurately using TACAN systems.

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  • 36. 

    what is the time delay before a TACAN station replies to an airborne interrogation

    • 10 milliseconds

    • 50 microseconds

    • 10 milliseconds

    • 50 milliseconds

    Correct Answer
    A. 50 microseconds
    Explanation
    The correct answer is 50 microseconds. TACAN (Tactical Air Navigation) is a navigation system used by aircraft. When an aircraft sends a signal or interrogation to a TACAN station, the station needs to reply with the necessary information. The time delay before the station replies is crucial for the accuracy and efficiency of the navigation system. In this case, the correct answer of 50 microseconds indicates that the TACAN station responds very quickly, ensuring that the aircraft receives the required information almost instantaneously.

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  • 37. 

    how many letters are contained in the morse code id tone for station identify

    • 3

    • 4

    • 5

    • 6

    Correct Answer
    A. 3
    Explanation
    The question asks for the number of letters contained in the Morse code for "station identify." Morse code is a system of representing letters and numbers using dots and dashes. The correct answer is 3 because the phrase "station identify" consists of two words, and each word has one letter that is represented in Morse code. Therefore, the total number of letters in the Morse code for "station identify" is 3.

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  • 38. 

    special TACAN info is displayed on the 

    • HSI

    • ADI

    • MFD

    • HUD

    Correct Answer
    A. HSI
    Explanation
    Special TACAN (Tactical Air Navigation) information is displayed on the HSI (Horizontal Situation Indicator). The HSI is a primary flight instrument that provides pilots with essential information about their aircraft's position and orientation. TACAN is a navigation system used by military aircraft that combines the features of VOR (VHF Omnidirectional Range) and DME (Distance Measuring Equipment). The HSI displays TACAN information such as bearing, distance, and identification codes, allowing pilots to navigate accurately and effectively during military operations.

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  • 39. 

    when the bearing pointer on the HSI slews clockwise at about 30 degrees per second, the aircraft TACAN system is said to be

    • Tracking

    • Defective

    • Searching

    • Locked-on

    Correct Answer
    A. Searching
    Explanation
    When the bearing pointer on the HSI slews clockwise at about 30 degrees per second, it indicates that the aircraft TACAN system is "searching". This means that the system is actively trying to locate and lock onto a TACAN station or signal. The rapid clockwise movement suggests that the system is scanning for the strongest signal and attempting to establish a connection with it. This behavior is typical when the TACAN system is in the process of searching for a reliable signal source.

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  • 40. 

    what state is the TACAN system in when the distance readout is being continuously updated due to distance changes

    • Track

    • Fixed

    • Locked

    • Ranging

    Correct Answer
    A. Track
    Explanation
    When the distance readout is being continuously updated due to distance changes, the TACAN system is in the "track" state. In this state, the system is actively tracking the distance between the TACAN station and the aircraft and updating the readout accordingly. This allows for real-time monitoring of the distance and enables accurate navigation and positioning for the aircraft.

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  • 41. 

    for TACAN, the display of the red and white striped bar on the HSI indicates

    • A TACAN course deviation warning

    • Relative bearing info is invalid

    • Power has been lost to the TACAN system

    • The TACAN measurement circuits have failed

    Correct Answer
    A. The TACAN measurement circuits have failed
    Explanation
    The red and white striped bar on the HSI indicates that the TACAN measurement circuits have failed. This means that the TACAN system is not functioning properly and is unable to provide accurate distance and bearing information. The failure of the measurement circuits can affect the overall navigation capabilities of the TACAN system, making it unreliable for navigation purposes.

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  • 42. 

    for TACAN, which of the following describes a centered course deviation bar indication

    • The TACAN station and the "to" arrow are in agreement

    • The TACAN station and the selected course are in agreement

    • The TACAN station and the heading marker are in agreement

    • The TACAN station and magnetic heading are in agreement

    Correct Answer
    A. The TACAN station and the selected course are in agreement
    Explanation
    A centered course deviation bar indication in TACAN means that the TACAN station and the selected course are in agreement. This means that the aircraft is flying directly towards the desired course and is on track.

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  • 43. 

    on the HSI course deviation scale for TACAN, how many degrees of course deviation does each dot represent 

    • 2.5

    • 5

    • 10

    • 12.5

    Correct Answer
    A. 5
    Explanation
    Each dot on the HSI course deviation scale for TACAN represents a deviation of 5 degrees. This means that if the aircraft is off course by one dot, it is deviating by 5 degrees from the desired course. The scale allows pilots to easily monitor their course deviation and make necessary corrections to stay on track.

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  • 44. 

    for the f16, what is the TACAN max line of sight operation range from surface and airborne beacons, respectively

    • 200 and 290 NM

    • 200 and 390 NM

    • 390 and 200 NM

    • 390 and 390 NM

    Correct Answer
    A. 390 and 200 NM
    Explanation
    The TACAN max line of sight operation range for the F16 is 390 NM from surface beacons and 200 NM from airborne beacons.

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  • 45. 

    what converts the TACAN receiver-transmitter output to a format compatible with the HSI

    • HSI buffer assembly

    • TACAN shockmount

    • D/A adapter

    • TACAN receiver-transmitter IO section

    Correct Answer
    A. D/A adapter
    Explanation
    The D/A adapter is responsible for converting the output of the TACAN receiver-transmitter into a format that is compatible with the HSI. This adapter takes the digital signals from the TACAN receiver-transmitter and converts them into analog signals that can be interpreted by the HSI. Without the D/A adapter, the TACAN receiver-transmitter output would not be compatible with the HSI, and the two systems would not be able to communicate effectively.

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  • 46. 

    what TACAN component houses a relay that receives power for the HSI range shutter control

    • TACAN R/T

    • D/A adapter

    • TACAN shockmount

    • Signal data converter

    Correct Answer
    A. TACAN shockmount
    Explanation
    The TACAN shockmount is the component that houses a relay that receives power for the HSI range shutter control. The shockmount is designed to absorb shocks and vibrations, protecting the delicate internal components of the TACAN system. It acts as a protective casing for the relay, ensuring that it remains secure and functional even in high vibration environments. The relay itself is responsible for receiving power and controlling the HSI range shutter, which is used to adjust the range displayed on the Horizontal Situation Indicator (HSI) instrument.

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  • 47. 

    what component provides TACAN system turn-on and volume control

    • TACAN R/T

    • TACAN control panel

    • Audio 1 panel

    • Audio 2 panel

    Correct Answer
    A. Audio 2 panel
    Explanation
    The Audio 2 panel is the component that provides TACAN system turn-on and volume control.

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  • 48. 

    the ILS localizer and glide-slope signals use what frequency bands

    • Both use UHF

    • Both use VHF

    • Localizer VHF and glide slope UHF

    • Localizer UHF and glide slope VHF

    Correct Answer
    A. Localizer VHF and glide slope UHF
    Explanation
    The localizer signal, which provides lateral guidance for the aircraft during approach and landing, uses the VHF frequency band. On the other hand, the glide-slope signal, which provides vertical guidance for the aircraft, uses the UHF frequency band. Therefore, the correct answer is "localizer VHF and glide slope UHF."

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  • 49. 

    the upper and lower side of the ILS glide slope course is modulated at 

    • 150 and 90 Hz, respectively

    • 90 and 150 Hz, respectively

    • 120 and 70 Hz, respectively

    • 70 and 120 Hz, respectively

    Correct Answer
    A. 90 and 150 Hz, respectively
    Explanation
    The upper and lower side of the ILS glide slope course is modulated at 90 and 150 Hz, respectively. This modulation is used to provide guidance to aircraft during instrument landing approaches. The modulation of the glide slope course helps pilots maintain the correct descent angle and alignment with the runway. The specific frequencies of 90 and 150 Hz are chosen for their effectiveness in providing accurate and reliable guidance to the aircraft.

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