# 2A354C CDC Volume 3.

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• 1.

### What is the transmitter power output for the AN/ARC-164 Have Quick II ultra-high frequency (UHF) radio?

• A.

5 watts

• B.

10 watts

• C.

15 watts

• D.

20 watts

B. 10 watts
Explanation
The transmitter power output for the AN/ARC-164 Have Quick II ultra-high frequency (UHF) radio is 10 watts.

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• 2.

### How many channels are available for the AN/ARC-164 Have Quick II ultra-high frequency (UHF) radio?

• A.

5,000

• B.

6,000

• C.

7,000

• D.

8,000

C. 7,000
Explanation
The AN/ARC-164 Have Quick II ultra-high frequency (UHF) radio has a total of 7,000 channels available.

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• 3.

### What is the warm-up time for the AN/ARC-164 Have Quick II ultra-high frequency (UHF) radio?

• A.

5 seconds

• B.

7 seconds

• C.

10 seconds

• D.

15 seconds

C. 10 seconds
Explanation
The warm-up time for the AN/ARC-164 Have Quick II ultra-high frequency (UHF) radio is 10 seconds.

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• 4.

### What is used to program the frequency-hopping pattern and rate for the Have Quick II, phase II radio?

• A.

Net number

• B.

Time of day (TOD)

• C.

Word of day (WOD)

• D.

Time of week (TOW)

C. Word of day (WOD)
Explanation
The correct answer is "Word of day (WOD)". In the Have Quick II, phase II radio system, the frequency-hopping pattern and rate are programmed using the Word of day (WOD). This term refers to a specific word that is used to determine the frequency-hopping sequence for a particular time period. By using the WOD, the radio can synchronize its frequency-hopping pattern with other radios in the network, ensuring secure and efficient communication.

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• 5.

### Time of day (TOD) for the ultra-high frequency (UHF) radio can be established by

• A.

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

• B.

A universal coordinated time hack with the global positioning satellite.

• C.

Setting all clocks Air Force-wide at a specified time each day.

• D.

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

D. 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 for the UHF radio can be established by receiving the time information from the ground, tower, or radar approach control. This ensures that the radio is synchronized with the official time provided by the control centers.

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• 6.

### What does the status switch on an ultra-high frequency (UHF) radio indicate?

• A.

• B.

Status of the UHF frequencies.

• C.

Alternate display and holds for 5 seconds.

• D.

Alternate display and holds for 10 seconds.

C. Alternate display and holds for 5 seconds.
Explanation
The status switch on an ultra-high frequency (UHF) radio indicates an alternate display and holds for 5 seconds. This means that when the status switch is activated, the radio will switch between different displays or information and hold each display for 5 seconds before switching to the next one. This feature allows the user to quickly view and access different information or settings on the UHF radio.

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• 7.

### What display would you get on the Have Quick II, phase II ultra-high frequency (UHF) radio, if there were no word of day (WOD) loaded?

• A.

• B.

ERROR

• C.

INVALID

• D.

No display

Explanation
If there were no word of day (WOD) loaded on the Have Quick II, phase II ultra-high frequency (UHF) radio, the display would show "BAD".

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• 8.

### Where is the secure voice control panel located on the F-16 aircraft?

• A.

Right console near the electronic counter measures (ECM) control panel.

• B.

Right console near the lighting control panel.

• C.

Left console near the lighting control panel.

• D.

Left console near the ECM control panel.

B. Right console near the lighting control panel.
Explanation
The secure voice control panel on the F-16 aircraft is located on the right console near the lighting control panel.

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• 9.

### What is the unique feature to the dual-seat KY-58 interface?

• A.

Aft cockpit controls volumes.

• B.

Forward cockpit controls volumes.

• C.

Both cockpits are set to a preset volume.

• D.

Both cockpits have independent volume control.

D. Both cockpits have independent volume control.
Explanation
The unique feature of the dual-seat KY-58 interface is that both cockpits have independent volume control. This means that each cockpit can adjust the volume to their preference without affecting the other cockpit. This allows for personalized audio settings and ensures that each pilot can hear clearly without any interference from the other cockpit.

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• 10.

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

• A.

AUDIO 1 panel.

• B.

AUDIO 2 panel.

• C.

COMM 1 control on up-front controls.

• D.

Volume control on secure voice control panel.

A. AUDIO 1 panel.
Explanation
The received message volume for code/radio (C/RAD) 1 and 2 is 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?

• A.

26 volts direct current (VDC); through a 5 amp circuit breaker.

• B.

28 VDC; through a 5 amp circuit breaker.

• C.

26 VDC; through a 10 amp circuit breaker.

• D.

28 VDC; through a 10 amp circuit breaker.

B. 28 VDC; through a 5 amp circuit breaker.
Explanation
The power requirement for the KY-58 secure voice system is 28 volts direct current (VDC) and 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?

• A.

OFF, operational (OP) and load (LD)

• B.

OFF, baseband (BB) and diphase (DP)

• C.

• D.

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

Explanation
The correct answer is Operational (OP), load (LD) and receive variable (RV). This means that the KY-58 secure voice control panel has three mode switch positions: OP, LD, and RV.

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• 13.

### What are the two positions of the filter switch on the secure voice processor?

• A.

IN and OUT

• B.

ON and OFF

• C.

• D.

A. IN and OUT
Explanation
The secure voice processor has a filter switch with two positions: IN and OUT. This switch allows the user to choose whether the filter is active or not. When the switch is set to IN, the filter is engaged and the processor will process the audio signal with the filter. When the switch is set to OUT, the filter is bypassed and the audio signal will not be processed with the filter.

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• 14.

### The Z-AHQ adapter allows the F-16 aircraft to use the

• A.

KY-28 in place of KY-58

• B.

KY-38 in place of KY-58

• C.

KY-58 in place of KY-28

• D.

KY-58 in place of KY-38

C. KY-58 in place of KY-28
Explanation
The Z-AHQ adapter enables the F-16 aircraft to replace the KY-28 with the KY-58. This means that the Z-AHQ adapter allows the F-16 to use a different cryptographic device, specifically the KY-58, instead of the original KY-28.

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• 15.

### On the F-16 aircraft, the intercommunication amplifier contains

• A.

A power gain control switch, air refueling signal amplifier, and a voice message unit (VMU) drive.

• B.

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

• C.

An aerial refueling signal amplifier, microphone relay, communication matrix, and a filter assembly.

• D.

A microphone headset amplifier, resistive audio mixing network, microphone relay, and a power gain control switch.

D. A microphone headset amplifier, resistive audio mixing network, microphone relay, and a power gain control switch.
Explanation
The intercommunication amplifier on the F-16 aircraft includes a microphone headset amplifier, resistive audio mixing network, microphone relay, and a power gain control switch. These components are essential for effective communication within the aircraft. The microphone headset amplifier amplifies the audio signals from the pilot's microphone, while the resistive audio mixing network combines the audio signals from different sources. The microphone relay controls the routing of audio signals, and the power gain control switch allows the pilot to adjust the amplification level. Overall, these components work together to ensure clear and efficient communication in the F-16 aircraft.

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• 16.

### You are experiencing a lot of crackling noise in the headsets of the F-16 aircraft. In view of this, you would check out the

• A.

• B.

Filter assembly.

• C.

Interphone amplifier.

• D.

Communication matrix.

B. Filter assembly.
Explanation
The crackling noise in the headsets of the F-16 aircraft suggests that there may be a problem with the filtering system. The filter assembly is responsible for removing any unwanted noise or interference from the communication system. By checking out the filter assembly, you can identify and fix any issues that may be causing the crackling noise, ensuring clear and uninterrupted communication in the headsets.

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• 17.

### The intercommunication control amplifier consists of a microphone and headset amplifier, a resistive audio mixing network, a microphone relay and a

• A.

Volume control.

• B.

Squelch control.

• C.

Filter assembly.

• D.

Gain control.

A. Volume control.
Explanation
The intercommunication control amplifier consists of a microphone and headset amplifier, a resistive audio mixing network, a microphone relay, and a volume control. The volume control allows the user to adjust the volume of the audio output, ensuring that it is at a comfortable level for communication. This feature is important in intercommunication systems as it allows users to control the volume according to their preferences and environmental conditions.

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• 18.

### On the F-16 aircraft, where is the voice message unit for the interphone system located?

• A.

Behind the pilot's seat.

• B.

In front of the pilot's seat.

• C.

Under the left-hand console.

• D.

Under the right-hand console.

D. Under the right-hand console.
Explanation
The voice message unit for the interphone system on the F-16 aircraft is located under the right-hand console.

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• 19.

### Where is the intercommunication amplifier on a D-model F-16 located?

• A.

Under the aft seat.

• B.

Left of the console.

• C.

Right of the console.

• D.

Behind the pilot's seat.

A. Under the aft seat.
Explanation
The intercommunication amplifier on a D-model F-16 is located under the aft seat.

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• 20.

### What are the operating controls for the intercom system?

• A.

Intercom microphone (MIC) switch and intercom volume control on the AUDIO 2 panel.

• B.

Intercom MIC switch and HOT MIC volume control on the AUDIO 1 panel.

• C.

HOT MIC switch and HOT MIC volume control on the AUDIO 1 panel.

• D.

HOT MIC switch and intercom volume control on the AUDIO 2 panel.

D. HOT MIC switch and intercom volume control on the AUDIO 2 panel.
Explanation
The correct answer is HOT MIC switch and intercom volume control on the AUDIO 2 panel. This is because the HOT MIC switch is used to activate the microphone, allowing the pilot or crew members to transmit their voice over the intercom system. The intercom volume control on the AUDIO 2 panel is used to adjust the volume of the intercom system, ensuring clear communication between the pilot and crew members.

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• 21.

### Where are the received audio signals, warning tones, and radio transmissions routed before they are sent to the intercom amplifier and the operator headset?

• A.

AUDIO 1 panel.

• B.

AUDIO 2 panel.

• C.

Communication audio panel.

• D.

Communications matrix assembly.

D. Communications matrix assembly.
Explanation
The received audio signals, warning tones, and radio transmissions are routed to the communications matrix assembly before being sent to the intercom amplifier and the operator headset. The communications matrix assembly acts as a central hub where all the audio signals are processed and distributed to the appropriate destinations. This ensures that the audio signals are properly managed and can be heard by the operator through the intercom amplifier and headset.

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• 22.

### What two systems give a Morse Code input to the F-16 interphone system?

• A.

Tactical air navigation (TACAN) and instrument landing system (ILS).

• B.

TACAN and identification friend or foe (IFF).

• C.

Radar bomb scoring (RBS) and ILS.

• D.

RBS and IFF)

A. Tactical air navigation (TACAN) and instrument landing system (ILS).
Explanation
Tactical air navigation (TACAN) and instrument landing system (ILS) are the two systems that provide a Morse Code input to the F-16 interphone system.

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• 23.

### On the F-16 ARC-210 very high frequency/ultra-high frequency (UHF/VHF) radio system, when transmission is initiated, to which position is the mic switched placed?

• A.

AFT.

• B.

FWD.

• C.

Inboard.

• D.

Outboard.

B. FWD.
Explanation
The correct answer is FWD. In the F-16 ARC-210 radio system, when transmission is initiated, the mic switch is placed in the forward position.

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• 24.

### On the F-16 ARC-210 very high frequency/ultra-high frequency (UHF/VHF) radio system, which component splits outgoing VHF transmissions into transmitted frequencies and routes the signals to the correct antenna?

• A.

VHF AM antenna.

• B.

VHF FM antenna.

• C.

VHF frequency diplexer.

• D.

UHF/VHF antenna selector.

C. VHF frequency diplexer.
Explanation
The VHF frequency diplexer is the component on the F-16 ARC-210 radio system that splits outgoing VHF transmissions into transmitted frequencies and routes the signals to the correct antenna. The diplexer allows for the separation of different frequencies and ensures that each signal is sent to the appropriate antenna for transmission.

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• 25.

### If the pilot wants to assign a new frequency to a preset channel on the F-16 ARC-210 very high frequency/ultra-high (UHF/VHF) radio system, which switch would be depressed?

• A.

COM 1.

• B.

COM 2.

• C.

M-SEL.

• D.

PRESET.

B. COM 2.
Explanation
To assign a new frequency to a preset channel on the F-16 ARC-210 radio system, the pilot would depress the COM 2 switch. This switch is specifically designed to control the second communication channel on the radio system. By depressing the COM 2 switch, the pilot can access and modify the preset frequencies assigned to that channel.

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• 26.

### When the F-16 ARC-210 very high frequency/ultra-high frequency (UHF/VHF) radio is receiving and transmitting on the UHF emergency frequency of 243 megahertz (MHz), what mode of operation is being used?

• A.

Guard.

• B.

Cipher.

• C.

Anti-jam.

• D.

Maritime.

A. Guard.
Explanation
When the F-16 ARC-210 very high frequency/ultra-high frequency (UHF/VHF) radio is receiving and transmitting on the UHF emergency frequency of 243 megahertz (MHz), it is using the Guard mode of operation. The Guard mode is specifically designed for emergency communications and is used to monitor and respond to distress signals.

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• 27.

### If the F-16 satellite communication (SATCOM) setup is automatic and no channel login is required, which SATCOM mode of operation is being used?

• A.

25K demand assigned multiple access (DAMA).

• B.

Demand assigned single access (DASA).

• C.

5K DAMA.

• D.

Dedicated.

D. Dedicated.
Explanation
If the F-16 satellite communication setup is automatic and no channel login is required, it suggests that the SATCOM mode of operation being used is "Dedicated." In a dedicated mode of operation, the communication channel is exclusively allocated to a specific user or system, eliminating the need for login or sharing the channel with other users. This ensures a dedicated and uninterrupted connection for the F-16 satellite communication setup.

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• 28.

### The advanced interference blanker unit (AIBU) interfaces with TACAN,

• A.

IFF, FCR, RTWS, and ECM.

• B.

INS, FCR, RTWS, IFF, and ECM.

• C.

SMS, FCR, RTWS, IFF, and ECM.

• D.

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

A. IFF, FCR, RTWS, and ECM.
Explanation
The advanced interference blanker unit (AIBU) interfaces with the IFF (Identification Friend or Foe) system, the FCR (Fire Control Radar), the RTWS (Radar Target Warning System), and the ECM (Electronic Countermeasures) system. These are all important components of a military aircraft's avionics system, and the AIBU is designed to work with them to mitigate interference and ensure proper functioning of these systems.

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• 29.

### The advanced interference blanker unit (AIBU) communicates with the general avionics computer (GAC) over the

• A.

AMUX bus.

• B.

BMUX bus.

• C.

CMUX bus.

• D.

DMUX bus.

B. BMUX bus.
Explanation
The correct answer is BMUX bus. The advanced interference blanker unit (AIBU) communicates with the general avionics computer (GAC) over the BMUX bus.

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• 30.

### The advanced interference blanker unit (AIBU) is operational anytime power is applied to

• A.

The stores management system (SMS).

• B.

The general avionics computer (GAC).

• C.

Both the GAC and SMS.

• D.

The aircraft.

D. The aircraft.
Explanation
The advanced interference blanker unit (AIBU) is operational anytime power is applied to the aircraft. This means that the AIBU will be functioning as long as the aircraft is powered on, regardless of whether power is applied to the stores management system (SMS), the general avionics computer (GAC), or both. Therefore, the correct answer is the aircraft itself.

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• 31.

### Advanced interference blanker unit (AIBU) faults are reported to the

• A.

Up-front controls (UFC).

• B.

General avionics computer (GAC).

• C.

Stores Management System (SMS).

• D.

B. General avionics computer (GAC).
Explanation
The correct answer is general avionics computer (GAC). This is because the GAC is responsible for receiving and processing fault reports from various systems in the aircraft, including the Advanced Interference Blanker Unit (AIBU). The GAC acts as the central hub for receiving and managing these fault reports, allowing for efficient troubleshooting and maintenance of the aircraft systems.

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• 32.

### Which technical order (TO) contains procedures for advanced interference blanker unit (AIBU) removal and installation?

• A.

99JG-00-01.

• B.

99JG-10-01.

• C.

99JG-20-01.

• D.

99JG-30-01.

C. 99JG-20-01.
Explanation
The correct answer is 99JG-20-01. This technical order contains procedures for advanced interference blanker unit (AIBU) removal and installation.

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• 33.

### What information does tactical air navigation (TACAN) provide to an aircrew?

• A.

Altitude, relative bearing, and slant range.

• B.

Slant range, altitude, and station identity tone.

• C.

Altitude, relative bearing, and station identity tone.

• D.

Slant range, relative bearing, and station identity tone.

D. Slant range, relative bearing, and station identity tone.
Explanation
Tactical air navigation (TACAN) provides an aircrew with information about slant range, which is the distance between the aircraft and the TACAN station, relative bearing, which is the direction of the TACAN station relative to the aircraft, and the station identity tone, which is a unique audio signal that helps the aircrew identify the specific TACAN station they are receiving signals from.

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• 34.

### Name the locations of tactical air navigation (TACAN) stations.

• A.

Ground, space, and airborne.

• B.

Ground, shipboard, and space.

• C.

Space, shipboard, and airborne.

• D.

Ground, shipboard, and airborne.

D. Ground, shipboard, and airborne.
Explanation
TACAN stations are used for tactical air navigation and can be located on the ground, on ships, or in the air. These stations provide navigational assistance to aircraft, helping them determine their position and navigate accurately. Having TACAN stations in these different locations allows for flexibility and coverage in various operational scenarios, whether it be on land, at sea, or in the air.

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• 35.

### In tactical air navigation (TACAN) terms, relative bearing is the

• A.

Location of a TACAN station in relation to magnetic north.

• B.

Angular distance between the TACAN station and the aircraft.

• C.

Straight-line distance between the TACAN station and the aircraft.

• D.

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

D. Directional position of the aircraft in relation to a known TACAN station.
Explanation
The correct answer is the directional position of the aircraft in relation to a known TACAN station. Relative bearing refers to the angle between the aircraft's heading and the direction of a TACAN station. It helps pilots determine their position in relation to the TACAN station and navigate accurately.

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• 36.

### What is the time delay before a tactical air navigation (TACAN) station replies to an airborne system interrogation?

• A.

10 microseconds.

• B.

50 microseconds.

• C.

10 milliseconds.

• D.

50 milliseconds.

B. 50 microseconds.
Explanation
The correct answer is 50 microseconds. Tactical air navigation (TACAN) stations reply to an airborne system interrogation with a time delay of 50 microseconds. This short delay allows for quick and efficient communication between the airborne system and the TACAN station, ensuring accurate navigation and tracking information.

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• 37.

### How many letters are contained in the Morse code identification tone for station identity?

• A.

Three.

• B.

Four.

• C.

Five.

• D.

Six.

A. Three.
Explanation
The Morse code identification tone for station identity consists of three letters.

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• 38.

### Specific tactical air navigation (TACAN) information is displayed on the

• A.

Horizontal situation indicator (HSI).

• B.

• C.

Multifunction display (MFD).

• D.

A. Horizontal situation indicator (HSI).
Explanation
The correct answer is the horizontal situation indicator (HSI). The HSI is a display instrument that provides pilots with information about their aircraft's position and orientation relative to the earth's surface. It combines the functions of a heading indicator and a navigation display, and it can also display TACAN information. The attitude direction indicator (ADI) provides information about the aircraft's pitch and roll, while the multifunction display (MFD) and head-up display (HUD) are used for different purposes and do not typically display TACAN information.

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• 39.

### When the bearing pointer on the horizontal situation indicator (HSI) slews clockwise at about 30 degrees per second, the aircraft tactical air navigation (TACAN) system is said to be

• A.

Tracking.

• B.

Defective.

• C.

Searching.

• D.

Locked-on.

C. Searching.
Explanation
When the bearing pointer on the HSI slews clockwise at about 30 degrees per second, it indicates that the aircraft's TACAN system is searching. This means that the system is actively trying to acquire and lock onto a TACAN station for navigation purposes. If the system were tracking, it would be following a specific TACAN station, and if it were locked-on, it would have successfully acquired and locked onto a station. Therefore, the correct answer is searching.

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• 40.

### What state is the tactical air navigation (TACAN) system in when the distance readout is being continuously updated due to distance changes?

• A.

Track.

• B.

Fixed.

• C.

Locked.

• D.

Ranging.

A. Track.
Explanation
When the distance readout is being continuously updated due to distance changes, it indicates that the TACAN system is in the "Track" state. In this state, the system is actively tracking and updating the distance information based on the movement of the target.

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• 41.

### For tactical air navigation (TACAN), the display of a red and white striped bar on the HSI indicates

• A.

A TACAN course deviation warning.

• B.

Relative bearing information is invalid.

• C.

Power has been lost to the TACAN system.

• D.

The TACAN measurement circuits have failed.

D. 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 unable to accurately measure and display the distance and bearing information. This warning is important for pilots to be aware of, as it indicates a loss of reliable navigation information from the TACAN system.

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• 42.

### For tactical air navigation (TACAN), which of the following describes a centered course deviation bar indication?

• A.

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

• B.

The TACAN station and the selected course are in agreement.

• C.

The TACAN station and the heading marker are in agreement.

• D.

The TACAN station and the magnetic heading are in agreement.

B. The TACAN station and the selected course are in agreement.
Explanation
A centered course deviation bar indication in tactical air navigation (TACAN) means that the TACAN station and the selected course are in agreement. This indicates that the aircraft is on the correct course and heading towards the desired destination.

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• 43.

### On the horizontal situation indicator (HSI) course deviation scale for tactical air navigation (TACAN), how many degrees of course deviation does each dot represent?

• A.

2.5

• B.

5

• C.

10

• D.

12.5

B. 5
Explanation
Each dot on the horizontal situation indicator (HSI) course deviation scale for tactical air navigation (TACAN) represents a deviation of 5 degrees from the desired course.

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• 44.

### For the F-16, what is the tactical air navigation (TACAN) maximum line-of-sight operating range from a surface beacon and an airborne beacon, respectively?

• A.

200 and 200 nautical miles (NM).

• B.

200 and 390 NM.

• C.

390 and 200 NM.

• D.

390 and 390 NM.

C. 390 and 200 NM.
Explanation
The correct answer is 390 and 200 NM. This means that the maximum line-of-sight operating range for the F-16's tactical air navigation (TACAN) from a surface beacon is 390 nautical miles, while the maximum range from an airborne beacon is 200 nautical miles.

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• 45.

### For the F-16, what converts the tactical air navigation (TACAN) receiver-transmitter output to a format compatible with the horizontal situation indicator (HSI)?

• A.

HSI buffer assembly.

• B.

TACAN shockmount.

• C.

• D.

Explanation
The correct answer is the Digital-to-analog (D/A) adapter. This device is responsible for converting the digital output from the tactical air navigation (TACAN) receiver-transmitter into an analog format that is compatible with the horizontal situation indicator (HSI). This allows the TACAN information to be displayed on the HSI for the pilot's reference and navigation.

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• 46.

### For the F-16, what tactical air navigation (TACAN) component houses a relay that receives power for horizontal situation indicator (HSI) range shutter control?

• A.

• B.

• C.

TACAN shockmount.

• D.

Signal data converter.

C. TACAN shockmount.
Explanation
The TACAN shockmount houses a relay that receives power for the HSI range shutter control in the F-16. This means that the shockmount is responsible for providing the necessary power to control the range shutter on the HSI, which is used for displaying the aircraft's position and navigation information.

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• 47.

### What component provides the F-16 tactical air navigation (TACAN) system turn-on and volume control?

• A.

• B.

TACAN control panel.

• C.

AUDIO 1 panel.

• D.

AUDIO 2 panel.

D. AUDIO 2 panel.
Explanation
The AUDIO 2 panel is the component that provides the F-16 tactical air navigation (TACAN) system turn-on and volume control. This panel is responsible for controlling the audio output of various systems in the aircraft, including the TACAN system. It allows the pilot to adjust the volume of the TACAN system and turn it on or off as needed.

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• 48.

### The instrument landing system (ILS) localizer and glide-slope signals use what frequency band(s)?

• A.

Both use UHF

• B.

Both use VHF

• C.

Localizer VHF and glide-slope UHF.

• D.

Localizer UHF and glide-slope VHF.

C. Localizer VHF and glide-slope UHF.
Explanation
The correct answer is Localizer VHF and glide-slope UHF. The instrument landing system (ILS) localizer uses VHF frequency band, while the glide-slope signal uses UHF frequency band.

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• 49.

### The upper and lower side of the instrument landing system (ILS) glide-slope course is modulated at

• A.

150 and 90 Hz, respectively.

• B.

90 and 150 Hz, respectively.

• C.

120 and 70 Hz, respectively.

• D.

70 and 120 Hz, respectively.

B. 90 and 150 Hz, respectively.
Explanation
The correct answer is 90 and 150 Hz, respectively. In the instrument landing system (ILS), the glide-slope course is modulated with two frequencies. The upper side is modulated at 150 Hz, while the lower side is modulated at 90 Hz. This modulation helps pilots maintain the correct vertical descent path during an instrument approach, ensuring a safe landing.

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• 50.

### What is "set up" for an aircraft using glide-slope information?

• A.

Proper left/right runway approach.

• B.

Identification of ILS ground station.

• C.

Distance to the approach end of the runway.

• D.

Proper vertical approach angle to land the aircraft.

D. Proper vertical approach angle to land the aircraft.
Explanation
"Set up" for an aircraft using glide-slope information refers to establishing the proper vertical approach angle to land the aircraft. Glide-slope information provides guidance to the pilot for maintaining the correct descent path during the approach and landing phase. By following the glide-slope, the pilot can ensure a safe and controlled descent towards the runway, allowing for a smooth landing.

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• Current Version
• Mar 19, 2023
Quiz Edited by
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• Apr 20, 2014
Quiz Created by
Blatham919

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