2A251 Volume 3 UREs

75 Questions | Total Attempts: 51

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Air Force Quizzes & Trivia

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Questions and Answers
  • 1. 
    The primary reason a high frequency (HF) radio uses single sideband (SSB) modulation is
    • A. 

      That fidelity is greatly increased

    • B. 

      The system can use a very wide-band pass

    • C. 

      The transmitter output power is 10 watts

    • D. 

      That it provides many channels on which to operate

  • 2. 
    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?
    • A. 

      24.500 MHz

    • B. 

      24.999 MHz

    • C. 

      25.001 MHz

    • D. 

      25.000 MHz

  • 3. 
    Which is not a mode of operation for the ARC-190 high-frequency radio system?
    • A. 

      Frequency modulation (FM)

    • B. 

      Upper sideband (USB) data

    • C. 

      Lower sideband (LSB) voice

    • D. 

      Amplitude modulated equivalent (AME)

  • 4. 
    You are using a learned preset for the ARC-190 high-frequency (HF) radio system. For this application, the transmit tune time is less than
    • A. 

      5 milliseconds

    • B. 

      25 milliseconds

    • C. 

      35 milliseconds

    • D. 

      50 microseconds

  • 5. 
    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?
    • A. 

      RT-1341(V)1

    • B. 

      RT-1341(V)2

    • C. 

      RT-1341(V)3

    • D. 

      RT-1341(V)4

  • 6. 
    In the ARC-190 high-frequency (HF) radio system, what helps prevent high voltage arcing within the HF coupler at high altitudes?
    • A. 

      Sealed tuner assembly

    • B. 

      Sealed control compartment

    • C. 

      Pressurized tuner assembly

    • D. 

      Pressurized control compartment

  • 7. 
    The external blower for an ARC-190 high-frequency radio system is overheating. This situation will cause a receiver-transmitter (RT) fault and
    • A. 

      Keep the coupler from tuning

    • B. 

      Reduce the external blower speed

    • C. 

      Cause the RT fault light to turnoff

    • D. 

      Keep the transmitter from functioning

  • 8. 
    A very-high frequency (VHF) frequency modulated (FM) radio is mainly used on aircraft that
    • A. 

      Contact ground forces

    • B. 

      Contacts airborne tankers for fuel

    • C. 

      Uses Air Force controlled airfields

    • D. 

      Is controlled by civilian air traffic controllers

  • 9. 
    Which very-high frequency (VHF) radio system would have the best chance of receiving a signal from a station located beyond the line of sight (LOS)?
    • A. 

      VHF amplitude modulated (AM)

    • B. 

      VHF omnirange (VOR)

    • C. 

      VHF frequency modulated (FM)

    • D. 

      Localizer/glideslope

  • 10. 
    Which very-high frequency (VHF) radio system uses two antennas?
    • A. 

      Frequency modulated (FM) homing

    • B. 

      Amplitude modulated (AM) communications

    • C. 

      FM communications

    • D. 

      AM direction finder

  • 11. 
    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
    • A. 

      30 to 87.975

    • B. 

      38 to 87.975

    • C. 

      108 to 151.975

    • D. 

      116 to 151.975

  • 12. 
    Which frequencies can the ARC-186 very-high frequency (VHF) radio not transmit with in the amplitude modulated (AM) mode?
    • A. 

      30 to 87.975 megahertz (MHz)

    • B. 

      38 to 87.975 MHz

    • C. 

      108 to 115.975 MHz

    • D. 

      116 to 151.975 MHz

  • 13. 
    We call the C-11029/ARC-186 a true communications/navigation (comm/nav) control box because
    • A. 

      Rivet work force changed its design

    • B. 

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

    • C. 

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

    • D. 

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

  • 14. 
    How many frequencies are available for the tunable main receiver to use in the ARC-164 ultra-high frequency (UHF) radio?
    • A. 

      10000

    • B. 

      7000

    • C. 

      3500

    • D. 

      700

  • 15. 
    How do Have Quick (HQ) radios resist jamming?
    • A. 

      Frequency-hopping

    • B. 

      Retransmission

    • C. 

      Encryption

    • D. 

      Phase shifting

  • 16. 
    The Have Quick II radios' frequency-hopping pattern and rate is programmed using this feature
    • A. 

      Time-of-day

    • B. 

      Word-of-day

    • C. 

      Net number used

    • D. 

      Universal time coordinated

  • 17. 
    Have Quick II radios frequency hop at the same instant in time because they
    • A. 

      Use the same net number

    • B. 

      Use time-of-day information

    • C. 

      Have the same word-of-day entered

    • D. 

      Are equipped with internal atomic clocks

  • 18. 
    The Have Quick II radio's entry point in the frequency-hopping pattern is established by the word-of-day; however, it is actually programmed using the
    • A. 

      Time-of-day

    • B. 

      Net number

    • C. 

      Multiple word-of-day

    • D. 

      Universal time coordinated

  • 19. 
    When two signals are received simultaneoulsy on the same operating net, the Have Quick II radio automatically goes into conferencing. It does this by
    • A. 

      Resetting the net number for communication

    • B. 

      Setting the receiver to narrowband reception

    • C. 

      Injecting a beat frequency to prevent loss of intelligence

    • D. 

      Offsetting the second transmitter frequency by 25 kilohertz

  • 20. 
    The HAVE QUICK II panel-mount configuration is primarily used in
    • A. 

      Retrofit situations

    • B. 

      Bomber aircraft

    • C. 

      Cargo aircraft

    • D. 

      New aircraft

  • 21. 
    What is the advantage of the remote Have Quick II configuration over the panel mount configuration in an aircraft?
    • A. 

      More convenient for maintenance

    • B. 

      Can be used with a remote channel indicator

    • C. 

      Reduced cost by using existing aircraft wiring

    • D. 

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

  • 22. 
    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?
    • A. 

      Two; 2 days use

    • B. 

      Four; 4 days use

    • C. 

      Six; 6 days use

    • D. 

      Eight; 8 days use

  • 23. 
    Which component takes over control in the event of an ARC-210 radio system remote tuning panel's failure?
    • A. 

      Radio set control

    • B. 

      Control display unit

    • C. 

      Remote tuning panel

    • D. 

      Remote volume control

  • 24. 
    The remote tuning panel can not control the ARC-210 radio system if the
    • A. 

      Radio set control is turned on

    • B. 

      Radio set control is turned off

    • C. 

      Remote volume control is turned on

    • D. 

      Remote volume control is turned off

  • 25. 
    A high pass filter is installed on the ARC-210 radio system to
    • A. 

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

    • B. 

      Attenuate FM commercial stations above 108 MHz

    • C. 

      Bleed over aircraft FM transmissions below 108 MHz

    • D. 

      Bleed over airraft FM transmissions below 108 MHz