2A251 Volume 3 UREs

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| By Catherine Halcomb
Catherine Halcomb
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  • 1/75 Questions

    How do Have Quick (HQ) radios resist jamming?

    • Frequency-hopping
    • Retransmission
    • Encryption
    • Phase shifting
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2A251 Volume 3 UREs - Quiz

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  • 2. 

    Approximately how many days can the underwater acoustical beacon transmit before battery power is depleted?

    • 10

    • 20

    • 25

    • 30

    Correct Answer
    A. 30
    Explanation
    The correct answer is 30. This suggests that the underwater acoustical beacon can transmit for approximately 30 days before its battery power is depleted.

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  • 3. 

    A very-high frequency (VHF) frequency modulated (FM) radio is mainly used on aircraft that

    • Contact ground forces

    • Contacts airborne tankers for fuel

    • Uses Air Force controlled airfields

    • Is controlled by civilian air traffic controllers

    Correct Answer
    A. Contact ground forces
    Explanation
    A very-high frequency (VHF) frequency modulated (FM) radio is mainly used on aircraft to contact ground forces. This means that the radio is primarily used for communication between the aircraft and ground personnel, such as military troops or support teams. It allows the aircraft to relay important information, coordinate operations, and receive instructions from the ground forces.

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  • 4. 

    The emergency communications aircraft system that emits pulses of high-frequency (HF) sound is the

    • Parachute radio (PR)

    • Crash position indicator (CPI)

    • Underwater acoustical beacon (UAB)

    • Emergency locator transmitter (ELT)

    Correct Answer
    A. Underwater acoustical beacon (UAB)
    Explanation
    The correct answer is the underwater acoustical beacon (UAB). This system emits pulses of high-frequency sound and is used for emergency communications. It is specifically designed to be used underwater, making it ideal for situations where an aircraft has crashed into water and needs to be located. The UAB emits these sound pulses, which can be detected by search and rescue teams using specialized equipment, allowing them to locate the aircraft and initiate rescue operations.

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  • 5. 

    What is the transmitted frequency when a high frequency (HF) radio control is set to 25.000-megahertz (MHz), with a signal modulated by a 1000-hertz tone, when the lower sideband mode is selected?

    • 24.500 MHz

    • 24.999 MHz

    • 25.001 MHz

    • 25.000 MHz

    Correct Answer
    A. 24.999 MHz
    Explanation
    When the lower sideband mode is selected, the transmitted frequency is slightly lower than the carrier frequency. In this case, the carrier frequency is set to 25.000 MHz and it is modulated by a 1000 Hz tone. The lower sideband will be 1000 Hz below the carrier frequency, resulting in a transmitted frequency of 24.999 MHz.

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  • 6. 

    A high pass filter is installed on the ARC-210 radio system to

    • Attenuate frequency-modulated (FM) commercial stations below 108 megahertz (MHz)

    • Attenuate FM commercial stations above 108 MHz

    • Bleed over aircraft FM transmissions below 108 MHz

    • Bleed over airraft FM transmissions below 108 MHz

    Correct Answer
    A. Attenuate frequency-modulated (FM) commercial stations below 108 megahertz (MHz)
    Explanation
    The high pass filter is installed on the ARC-210 radio system to attenuate frequency-modulated (FM) commercial stations below 108 megahertz (MHz). This means that the filter is designed to reduce the strength or intensity of FM signals from commercial stations that are below the frequency of 108 MHz. By doing so, the filter helps to prevent interference from these stations and ensures that the radio system can effectively transmit and receive signals within its intended frequency range.

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  • 7. 

    The emergency locator transmitter (ELT) is designed to survive an impact of up to

    • 50 gravitational forces or Gs

    • 100 Gs

    • 125 Gs

    • 135 Gs

    Correct Answer
    A. 100 Gs
    Explanation
    The emergency locator transmitter (ELT) is designed to survive an impact of up to 100 Gs. Gs, or gravitational forces, are a unit of measurement used to describe the force experienced by an object during acceleration or deceleration. In the case of an ELT, it is crucial for it to withstand high impact forces in the event of a crash or accident. A rating of 100 Gs indicates that the ELT is built to withstand a significant amount of force, ensuring its functionality and ability to transmit distress signals even in severe conditions.

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  • 8. 

    Which built-in-test (BIT) is activated by pressing the BIT pushbutton switch on the airborne digital interphone system (ADIS) interphone audio control panel (IACP)?

    • Continuous BIT (CBIT)

    • Degraded BIT (DBIT)

    • Maintenance BIT (MBIT)

    • Power-up BIT (PBIT)

    Correct Answer
    A. Maintenance BIT (MBIT)
    Explanation
    The correct answer is Maintenance BIT (MBIT). This is the built-in-test that is activated by pressing the BIT pushbutton switch on the airborne digital interphone system (ADIS) interphone audio control panel (IACP). MBIT is a self-diagnostic feature that allows for the continuous monitoring and testing of the system's components and functions. By pressing the BIT pushbutton switch, the system initiates the MBIT process to identify any faults or failures in the interphone audio control panel and its associated components. This helps in ensuring the system's reliability and performance during flight operations.

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  • 9. 

    The purpose of the battery in the KY-58 processor is to

    • Prevent the automatic zeroing of the codes after the aircraft power is removed

    • Enable the secure voice system to be used as an emergency transmitter

    • Enable the secure voice system to operate from aircraft power

    • Zeroize the codes after aircraft power is removed

    Correct Answer
    A. Prevent the automatic zeroing of the codes after the aircraft power is removed
    Explanation
    The battery in the KY-58 processor is used to prevent the automatic zeroing of the codes after the aircraft power is removed. This means that even if the power to the aircraft is turned off, the battery will ensure that the codes stored in the processor are not lost or reset. This is important for maintaining the security and integrity of the secure voice system, as the codes are crucial for encryption and decryption of communications.

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  • 10. 

    The frequency range of the ARC-186 very-high frequency (VHF) radio receiver, in only the receive amplitude modulated (AM) mode, is this megahertz (MHz) range

    • 30 to 87.975

    • 38 to 87.975

    • 108 to 151.975

    • 116 to 151.975

    Correct Answer
    A. 108 to 151.975
    Explanation
    The correct answer is 108 to 151.975. This range represents the frequency range of the ARC-186 VHF radio receiver in the receive AM mode.

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  • 11. 

    The CALL switch applies a direct current (DC) voltage to the CALL control line and activates the automatic gain control (AGC) circuits in all aircraft control panels' headset amplifiers. This causes the CALL audio to be heard at least

    • 2 decibel (dB) louder than any other signals present

    • 4 dB louder than any other signals present

    • 6 dB louder than any other signals present

    • 8 dB louder than any other signals present

    Correct Answer
    A. 6 dB louder than any other signals present
    Explanation
    The CALL switch activates the AGC circuits in all aircraft control panels' headset amplifiers, which results in the CALL audio being heard 6 dB louder than any other signals present.

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  • 12. 

    This INTERpHONE FUNCTION switch allows crewmembers to talk to other aircraft positions without pressing the mic button

    • CALL

    • Hot-mic

    • Monitor

    • Interphone

    Correct Answer
    A. Hot-mic
    Explanation
    The correct answer is "Hot-mic." The hot-mic function allows crewmembers to communicate with other aircraft positions without having to press the microphone button. This means that their microphone is always active, allowing for constant communication without the need to manually activate the microphone.

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  • 13. 

    The major difference between the U92A/U the U94A/U jack, on the C-6624/AIC-25 interphone station's H-78/A1C headset/microphone, is the

    • U92A/U has a push-to-talk (PTT) button

    • U94A/U has a PTT button

    • U94A/U is located on the pilot's throttle grip

    • U92A/U requires an additional wire for the TALK switch

    Correct Answer
    A. U94A/U has a PTT button
    Explanation
    The major difference between the U92A/U and the U94A/U jack on the C-6624/AIC-25 interphone station's H-78/A1C headset/microphone is that the U94A/U has a PTT button located on the pilot's throttle grip. In contrast, the U92A/U requires an additional wire for the TALK switch. This means that the U94A/U allows the pilot to easily activate the push-to-talk function without needing an extra wire, making it more convenient to use in the cockpit.

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  • 14. 

    The external blower for an ARC-190 high-frequency radio system is overheating. This situation will cause a receiver-transmitter (RT) fault and

    • Keep the coupler from tuning

    • Reduce the external blower speed

    • Cause the RT fault light to turnoff

    • Keep the transmitter from functioning

    Correct Answer
    A. Keep the transmitter from functioning
    Explanation
    If the external blower for an ARC-190 high-frequency radio system is overheating, it can cause the transmitter to stop functioning. This is because the external blower plays a crucial role in cooling down the system, and if it is overheating, it will not be able to effectively cool the transmitter, leading to its malfunctioning.

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  • 15. 

    We call the C-11029/ARC-186 a true communications/navigation (comm/nav) control box because

    • Rivet work force changed its design

    • It controls the very-high frequency amplitude-modulated (AM) and frequency modulated (FM) systems

    • It controls both the very-high frequency (VHF) radio and the VHF-omnirange/instrument landing system (VOR/ILS) receiver

    • Automatic direction finding and homing share similar communication and navigation systems' characteristics

    Correct Answer
    A. It controls both the very-high frequency (VHF) radio and the VHF-omnirange/instrument landing system (VOR/ILS) receiver
    Explanation
    The correct answer is that the C-11029/ARC-186 is considered a true communications/navigation control box because it controls both the very-high frequency (VHF) radio and the VHF-omnirange/instrument landing system (VOR/ILS) receiver. This implies that it has the capability to manage and regulate both the communication and navigation functions of the aircraft.

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  • 16. 

    The purpose of the +17 to +19-voltage direct current (VDC) on the CALL control line of the C-6567 interphone set control is to

    • Reduce the level of CALL audio input

    • Disable the mic amplifier during CALL operation

    • Energive the CALL switch on the front panel of the c-6624

    • Activate the automatic gain control (AGC) circuits in the headset amplifiers

    Correct Answer
    A. Activate the automatic gain control (AGC) circuits in the headset amplifiers
    Explanation
    The +17 to +19-voltage direct current (VDC) on the CALL control line of the C-6567 interphone set control is used to activate the automatic gain control (AGC) circuits in the headset amplifiers. This voltage is necessary to regulate and adjust the amplification levels of the audio signals in order to maintain a consistent and optimal volume for the user. By activating the AGC circuits, the interphone set can automatically adjust the amplification based on the incoming audio signal, ensuring clear and balanced communication.

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  • 17. 

    How is the CYZ-10 data transfer device (DTD) classified?

    • By the DTD software load

    • By data entry on the DTD key pad

    • By installing the crypto ignition key

    • Through the host/application section

    Correct Answer
    A. By installing the crypto ignition key
    Explanation
    The CYZ-10 data transfer device (DTD) is classified by installing the crypto ignition key. The crypto ignition key is a security measure that allows access to encrypted data on the DTD. By installing this key, the DTD can securely transfer data and ensure that only authorized personnel can access it. This classification method ensures that sensitive information is protected and only accessible to those with the proper authorization.

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  • 18. 

    The purpose of the cryptographic KOI-18 loading device is to

    • Store electronic keying material

    • Protect classified programs from compromise

    • Encrypt data stored in the data transfer device

    • Convert an eight level punched tape data to a serial output

    Correct Answer
    A. Convert an eight level punched tape data to a serial output
    Explanation
    The cryptographic KOI-18 loading device is designed to convert an eight level punched tape data to a serial output. This means that it takes the data stored in the punched tape and converts it into a format that can be transmitted or processed serially. This conversion allows for easier transfer and manipulation of the data, making it more efficient and practical to use.

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  • 19. 

    How many frequencies are available for the tunable main receiver to use in the ARC-164 ultra-high frequency (UHF) radio?

    • 10000

    • 7000

    • 3500

    • 700

    Correct Answer
    A. 7000
    Explanation
    The correct answer is 7000 because the question asks about the number of frequencies available for the tunable main receiver in the ARC-164 ultra-high frequency (UHF) radio. Therefore, out of the given options, 7000 is the most suitable choice as it represents the number of frequencies available for use.

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  • 20. 

    When two signals are received simultaneoulsy on the same operating net, the Have Quick II radio automatically goes into conferencing. It does this by

    • Resetting the net number for communication

    • Setting the receiver to narrowband reception

    • Injecting a beat frequency to prevent loss of intelligence

    • Offsetting the second transmitter frequency by 25 kilohertz

    Correct Answer
    A. Offsetting the second transmitter frequency by 25 kilohertz
    Explanation
    The correct answer is offsetting the second transmitter frequency by 25 kilohertz. When two signals are received simultaneously on the same operating net, the Have Quick II radio automatically goes into conferencing by offsetting the frequency of the second transmitter by 25 kilohertz. This helps to prevent interference and ensure clear communication between the two signals. By offsetting the frequency, the radio is able to distinguish between the two signals and maintain effective communication.

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  • 21. 

    The radio TRANSMITTER SELECTION switch is a seven-position rotary switch that allows the aircrew to

    • Select and transmit on each radio system and the interphone

    • Select and monitor the aircraft emergency warning tones

    • Tune each radio system and key the interphone

    • Select the radio transmitter frequencies

    Correct Answer
    A. Select and transmit on each radio system and the interphone
    Explanation
    The radio TRANSMITTER SELECTION switch is a crucial component in an aircraft's communication system. It is a seven-position rotary switch that enables the aircrew to select and transmit on each radio system and the interphone. This means that the switch allows the crew to choose which radio system they want to use for communication and also enables them to transmit their messages through the interphone system. Additionally, the switch also allows the crew to monitor the aircraft emergency warning tones, tune each radio system, and select the radio transmitter frequencies.

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  • 22. 

    Which interphone system transmission operation is most advantageous to pilots/copilots and why is it important?

    • One-button operation; it is less time consuming

    • One-button operation; it allows them to talk on radios and maintain communication with the crew

    • Two-button operation; it is less time consuming

    • Two-button operation; it allows them to talk on radios and maintain communication with the crew

    Correct Answer
    A. Two-button operation; it allows them to talk on radios and maintain communication with the crew
    Explanation
    The correct answer is two-button operation because it allows pilots and copilots to talk on radios and maintain communication with the crew. This is important because effective communication is crucial in aviation for ensuring safety and coordinating actions between the flight crew. Having a two-button operation enables pilots and copilots to easily switch between interphone communication and radio communication, allowing them to stay connected with the crew and external parties simultaneously.

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  • 23. 

    What is the advantage of the remote Have Quick II configuration over the panel mount configuration in an aircraft?

    • More convenient for maintenance

    • Can be used with a remote channel indicator

    • Reduced cost by using existing aircraft wiring

    • Can be used with a ultra-high frequency direction finding system

    Correct Answer
    A. Reduced cost by using existing aircraft wiring
    Explanation
    The advantage of the remote Have Quick II configuration over the panel mount configuration in an aircraft is that it reduces cost by utilizing the existing aircraft wiring. This means that there is no need for additional wiring installation, resulting in cost savings for the aircraft owner.

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  • 24. 

    The emergency communications system that deploys from an aircraft before or at impact, to give it a better chance of surviving the crash, is the

    • Parachute radio (PR)

    • Crash position indicator (CPI)

    • Underwater acoustical beacon (UAB)

    • Emergency locator transmitter (ELT)

    Correct Answer
    A. Crash position indicator (CPI)
    Explanation
    The crash position indicator (CPI) is an emergency communications system that is deployed from an aircraft before or at impact to increase its chances of surviving a crash. It is designed to help locate the aircraft in the event of a crash by emitting a distress signal. The CPI is typically equipped with a radio transmitter and a GPS system, allowing search and rescue teams to quickly and accurately locate the crash site. Unlike the other options, the CPI specifically refers to a system used for indicating the position of the aircraft during a crash.

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  • 25. 

    Which secure voice compnent will you use to integrate the KY-58 processor into existing aircraft installations?

    • Z-AHQ adapter

    • KY-58 processor

    • KYK-13 fill device

    • KY-58 remote control unit control panel

    Correct Answer
    A. Z-AHQ adapter
    Explanation
    The Z-AHQ adapter is the secure voice component that will be used to integrate the KY-58 processor into existing aircraft installations.

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  • 26. 

    The primary reason a high frequency (HF) radio uses single sideband (SSB) modulation is

    • That fidelity is greatly increased

    • The system can use a very wide-band pass

    • The transmitter output power is 10 watts

    • That it provides many channels on which to operate

    Correct Answer
    A. That it provides many channels on which to operate
    Explanation
    The primary reason a high frequency (HF) radio uses single sideband (SSB) modulation is that it provides many channels on which to operate. SSB modulation allows for more efficient use of the limited available bandwidth in the HF spectrum by eliminating the need for a carrier signal and one sideband. This enables multiple channels to be transmitted within the same frequency range, increasing the number of available communication channels for HF radios.

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  • 27. 

    In the ARC-190 high-frequency (HF) radio system, what helps prevent high voltage arcing within the HF coupler at high altitudes?

    • Sealed tuner assembly

    • Sealed control compartment

    • Pressurized tuner assembly

    • Pressurized control compartment

    Correct Answer
    A. Pressurized tuner assembly
    Explanation
    The pressurized tuner assembly helps prevent high voltage arcing within the HF coupler at high altitudes. By maintaining a higher pressure inside the tuner assembly, it creates a barrier that prevents the formation of arcing, which can be caused by the high altitudes and the associated changes in air pressure. This pressurized environment ensures that the HF coupler remains protected and functions properly, allowing for reliable communication in high altitude conditions.

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  • 28. 

    When the wires easily pull loose from the U-94A/U headset/microphone connection on the C-6624/AIC-25 interphone station, it is typically because

    • The internal clamp is missing

    • The wires were cut to incorrect length

    • The wires have weak solder connections

    • The screws have not been tightened completely

    Correct Answer
    A. The internal clamp is missing
    Explanation
    The correct answer is that the internal clamp is missing. This means that there is no mechanism in place to secure the wires in the U-94A/U headset/microphone connection on the C-6624/AIC-25 interphone station. Without the clamp, the wires can easily pull loose, resulting in a loose connection.

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  • 29. 

    All interphone audio common lines are connected to ground at a single point in order to

    • Amplify stray audio frequencies

    • Eliminate audio frequencies above 16,000 kilohertz (kHz)

    • Ensure that high-voltage potentials are not detected in the audio circuits

    • Minimize the stray electromagnetic radiation from being picked up by the system

    Correct Answer
    A. Minimize the stray electromagnetic radiation from being picked up by the system
    Explanation
    Connecting all interphone audio common lines to ground at a single point helps to minimize the stray electromagnetic radiation from being picked up by the system. By grounding the common lines, any stray electromagnetic radiation that may be present is directed away from the audio circuits, reducing the chances of interference or noise being introduced into the system. This grounding technique helps to maintain the integrity and quality of the audio signals transmitted through the interphone system.

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  • 30. 

    What wire color is connected to the push-to-talk (PTT) button, on the U-94A/U of the C-6624/AIC-25 interphone station's H-78/A1C headset/microphone, when you connect the WM-85/U interphone cable to the U-94A/U jack?

    • White

    • Green

    • Black

    • Yellow

    Correct Answer
    A. Yellow
    Explanation
    When connecting the WM-85/U interphone cable to the U-94A/U jack on the C-6624/AIC-25 interphone station's H-78/A1C headset/microphone, the wire color that is connected to the push-to-talk (PTT) button is yellow.

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  • 31. 

    The HAVE QUICK II multiple word-of-day (MWOD) modification provided loading capability to allow entering up to how many words for what number of days usage, respectively?

    • Two; 2 days use

    • Four; 4 days use

    • Six; 6 days use

    • Eight; 8 days use

    Correct Answer
    A. Six; 6 days use
    Explanation
    The HAVE QUICK II multiple word-of-day (MWOD) modification allows for entering up to six words for a usage period of six days. This modification provides loading capability for a specific number of words and days, allowing for efficient communication and operation within a set time frame.

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  • 32. 

    Which one of the following frequencies is not reserved for emergency use?

    • 8.0 megahertz (MHz)

    • 40.5 MHz

    • 121.5 MHz

    • 243.0 Mhz

    Correct Answer
    A. 8.0 megahertz (MHz)
    Explanation
    The correct answer is 8.0 megahertz (MHz). This frequency is not reserved for emergency use. The other frequencies listed, 40.5 MHz, 121.5 MHz, and 243.0 MHz, are all reserved for emergency communication purposes.

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  • 33. 

    This term describes the lines used to determine whether a transceiver connected to the intercom system will be in a transmit or receive condition

    • Control

    • Receiver audio

    • System ground

    • Microphone audio

    Correct Answer
    A. Control
    Explanation
    The term "control" is used to describe the lines that determine whether a transceiver connected to the intercom system will be in a transmit or receive condition. These control lines play a crucial role in managing the communication flow between the transceiver and the intercom system, allowing the user to switch between transmitting and receiving audio signals as needed.

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  • 34. 

    This indicates the presence of a valid key that is loaded into the KYK-13 cryptographic loading device

    • One 60 Hz audible beep

    • One red indicator flash

    • Two 60 Hz audible beeps

    • Two red indicator flashes

    Correct Answer
    A. One red indicator flash
    Explanation
    The presence of a valid key loaded into the KYK-13 cryptographic loading device is indicated by one red indicator flash. This flash serves as a confirmation that a valid key has been successfully loaded into the device.

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  • 35. 

    Which KY-58 line replacable unit (LRU) has the primary function of transmitting and receiving secure voice messages?

    • Z-AHQ adapter

    • Remote control unit control panel

    • KYK-13 fill device

    • TSEC secure voice processor

    Correct Answer
    A. TSEC secure voice processor
    Explanation
    The TSEC secure voice processor is the correct answer because it is specifically designed to transmit and receive secure voice messages. The other options, such as the Z-AHQ adapter, remote control unit control panel, and KYK-13 fill device, do not have the primary function of secure voice communication.

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  • 36. 

    This version of the ARC-190 high-frequency (HF) radio system receiver-transmitter (RT) only operated properly if the system has a CU-2275(V)1 HF antenna coupler installed?

    • RT-1341(V)1

    • RT-1341(V)2

    • RT-1341(V)3

    • RT-1341(V)4

    Correct Answer
    A. RT-1341(V)1
    Explanation
    The explanation for the correct answer is that the ARC-190 HF radio system receiver-transmitter (RT) only operates properly when it has a CU-2275(V)1 HF antenna coupler installed. This implies that the RT-1341(V)1 is the version of the radio system that is compatible with the CU-2275(V)1 antenna coupler. The other versions, RT-1341(V)2, RT-1341(V)3, and RT-1341(V)4, may not have the necessary compatibility with the antenna coupler, so they would not operate properly with the ARC-190 HF radio system.

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  • 37. 

    Which very-high frequency (VHF) radio system uses two antennas?

    • Frequency modulated (FM) homing

    • Amplitude modulated (AM) communications

    • FM communications

    • AM direction finder

    Correct Answer
    A. Frequency modulated (FM) homing
    Explanation
    Frequency modulated (FM) homing is the correct answer because it is a VHF radio system that utilizes two antennas. This system is commonly used in aviation and maritime applications for navigation and tracking purposes. By using two antennas, FM homing can determine the direction of a signal source by comparing the strength of the signal received by each antenna. This allows for accurate and reliable tracking of signals in VHF frequencies.

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  • 38. 

    What component is used to control the ARC-210 radio system if dual integrating processing center (IPC) fails?

    • Radio set control

    • Control display unit

    • Remote tuning panel

    • Remote volume control

    Correct Answer
    A. Radio set control
    Explanation
    The component used to control the ARC-210 radio system if the dual integrating processing center (IPC) fails is the Radio set control. This control allows the user to manage and operate the radio system directly, bypassing the IPC. In the event of a failure in the IPC, the radio set control ensures that communication can still be maintained and controlled effectively.

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  • 39. 

    Which one of the following is not a PRC-90 emergency radio operating mode?

    • Morse code

    • Two-way voice communications

    • Three-way voice communications

    • Variable audio modulation between 1000 and 300 hertz

    Correct Answer
    A. Three-way voice communications
    Explanation
    The PRC-90 emergency radio is designed for search and rescue operations. It is capable of Morse code communication, two-way voice communication, and variable audio modulation between 1000 and 300 hertz. However, three-way voice communication is not a feature of the PRC-90 emergency radio.

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  • 40. 

    When activated, the emergency locator transmitter (ELT) continues transmitting on frequencies

    • 8.0 and 121.5 megahertz (MHz)

    • 243.0 and 282.8 Mhz

    • 254.5 and 282.8 MHz

    • 121.5 and 243.0 MHz

    Correct Answer
    A. 121.5 and 243.0 MHz
    Explanation
    The emergency locator transmitter (ELT) is a device that is activated in emergency situations to transmit distress signals and help rescuers locate the aircraft or vessel in distress. The correct answer states that when activated, the ELT continues transmitting on frequencies 121.5 and 243.0 MHz. These frequencies are commonly used for emergency distress signals and are monitored by search and rescue organizations. By transmitting on these frequencies, the ELT increases the chances of being detected and located by rescue teams.

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  • 41. 

    If a second operator keys a transmitter that is already keyed, during transmit mode on the airborne digital interphone system's (ADIS) interphone audio control panel (IACP), then the second operator's IACP will display the message

    • BUSY

    • NO TX

    • IN USE

    • INVALID

    Correct Answer
    A. NO TX
    Explanation
    If a second operator keys a transmitter that is already keyed, the second operator's IACP will display the message "NO TX". This means that the transmitter is already in use and the second operator cannot transmit at that moment.

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  • 42. 

    If you leave the punched tape in the KOI-18 cryptographic loading device for an extended amount of time, the

    • KOI-18 will shutdown

    • KOI-18 battery will run down

    • Punched tape will be damaged

    • Transferred crypto key will expire

    Correct Answer
    A. KOI-18 battery will run down
    Explanation
    If the punched tape is left in the KOI-18 cryptographic loading device for an extended period of time, the device will continue to consume power from its battery. As a result, the battery will eventually run down and lose its charge. This can lead to the device shutting down or becoming inoperable until the battery is recharged or replaced.

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  • 43. 

    How many KYK-13 cryptographic loading devices will you require if 12 cryptographic keys need to be stored?

    • One

    • Two

    • Four

    • Six

    Correct Answer
    A. Two
    Explanation
    If 12 cryptographic keys need to be stored, two KYK-13 cryptographic loading devices will be required. Each device can store up to six cryptographic keys, so two devices are needed to accommodate all 12 keys.

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  • 44. 

    Which of the following is not a primary purpose of the cryptographic CYZ-10 data transfer device (DTD)?

    • Process communcations security (COMSEC) variables

    • Store electronic keying material

    • Process host/application data

    • Store frequency-hopping data

    Correct Answer
    A. Process host/application data
    Explanation
    The cryptographic CYZ-10 data transfer device (DTD) is primarily used for processing communications security (COMSEC) variables, storing electronic keying material, and storing frequency-hopping data. However, it is not designed to process host/application data.

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  • 45. 

    Which unit is needed to transfer cryptographic variables into the KY-58 processor?

    • Z-AHQ adapter

    • KY-575 processor

    • KYK-13 fill device

    • KY-58 remote control unit control panel

    Correct Answer
    A. KYK-13 fill device
    Explanation
    The KYK-13 fill device is needed to transfer cryptographic variables into the KY-58 processor. This device is specifically designed for this purpose and allows for the secure transfer of cryptographic keys and variables. It ensures that the correct encryption keys are loaded into the KY-58 processor, enabling secure communication and encryption.

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  • 46. 

    The Have Quick II radios' frequency-hopping pattern and rate is programmed using this feature

    • Time-of-day

    • Word-of-day

    • Net number used

    • Universal time coordinated

    Correct Answer
    A. Word-of-day
    Explanation
    The word-of-day feature is used to program the frequency-hopping pattern and rate of Have Quick II radios. This feature involves assigning a specific word for each day, which is then used to determine the frequency-hopping sequence for that day. By programming the radios with the word-of-day, the radios can synchronize their frequency-hopping patterns, ensuring secure and reliable communication.

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  • 47. 

    When the airborne digital interphone system (ADIS) is in emergency mode, interphone audio control panel (IACP) #3 (Navigator) is directly paired with

    • High frequency radio #1

    • Communications radio #1

    • Communications radio #2

    • Communications radio #3

    Correct Answer
    A. High frequency radio #1
    Explanation
    When the airborne digital interphone system (ADIS) is in emergency mode, interphone audio control panel (IACP) #3 (Navigator) is directly paired with high frequency radio #1. In emergency mode, it is crucial for the navigator to have direct access to the high frequency radio #1, as it is typically used for emergency communications and long-range communication. This direct pairing ensures that the navigator can quickly and efficiently communicate during emergency situations.

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  • 48. 

    The CYZ-10 data transfer device (DTD) is cryptographic equipment that has a sealed case with this number of external openings

    • One

    • Two

    • Three

    • Four

    Correct Answer
    A. Three
    Explanation
    The CYZ-10 data transfer device (DTD) is a cryptographic equipment that has a sealed case with three external openings. This suggests that the device is designed with three openings for connecting cables or other devices for data transfer purposes. Having multiple openings allows for flexibility in connecting various peripherals or devices to the DTD, enhancing its functionality and usability.

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  • 49. 

    The crewmembers address the secure voice system through the

    • Interphone system

    • AN/ARC 210 switch panel

    • KY-100 mode control panel

    • Have Quick II radio set control

    Correct Answer
    A. Interphone system
    Explanation
    The crewmembers address the secure voice system through the interphone system. The interphone system allows them to communicate internally within the aircraft, including accessing the secure voice system. The other options mentioned, such as the AN/ARC 210 switch panel, KY-100 mode control panel, and Have Quick II radio set control, may have different functions but do not directly address the secure voice system. The interphone system is specifically designed for internal communication within the aircraft, making it the correct answer in this context.

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Quiz Review Timeline (Updated): Jun 18, 2024 +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Jun 18, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Mar 24, 2016
    Quiz Created by
    Catherine Halcomb

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