3D156 Volume 1

125 Questions | Total Attempts: 42

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Volume Quizzes & Trivia

Questions and Answers
  • 1. 
    What publication lists the specific duties of the airfield systems technician?
    • A. 

      AFI 36-2101, Air Force Training Program

    • B. 

      AFI 36-2108, Airman Classification System

    • C. 

      AFI 21-116, Communications Maintenance Functions

    • D. 

      3D1X6 Carerr Field Education and Training Plan (CFETP)

  • 2. 
    What poisonous substances can eat away flesh on contact?
    • A. 

      Inflammables

    • B. 

      Electrolytes

    • C. 

      Corrosives

    • D. 

      Irritants

  • 3. 
    General purpose detergents (spray and wipe) used in most work centers are
    • A. 

      Corrosive

    • B. 

      Eye irritants

    • C. 

      Skin irritants

    • D. 

      Respiratory irritants

  • 4. 
    What occurs during the absorption of radio frequency (RF) power?
    • A. 

      Cooling

    • B. 

      Heating

    • C. 

      Irritation

    • D. 

      Cell damage

  • 5. 
    Being distracted from a task while thinking of personal problems is an example of which type of human hazard factor?
    • A. 

      Emotional

    • B. 

      Domestic

    • C. 

      Physical

    • D. 

      Mental

  • 6. 
    Who is responsible for determining which individuals are authorized to climb communications poles, antenna supports, and so forth?
    • A. 

      Nearest engineering and installation element

    • B. 

      Work center supervisor

    • C. 

      Unit commander

    • D. 

      Wing safety

  • 7. 
    In which Air Force Occupational Safety and Health Standard (AFOSHSTD) will you find guidance on proper inspection, maintenace, and use of the pesonal fall arrest system (PFAS)?
    • A. 

      91-31, Personal Protective Equipment

    • B. 

      91-50, Communications Cable, Antenna, and Communications Electronics Systems

    • C. 

      91-100, Aircraft Flight Line - Ground Operations and Activities

    • D. 

      91-501, Air Force COnsolidated Occupational Safety Standard

  • 8. 
    Some of the common elements of a fixed base are fixed
    • A. 

      Navigation systems and a temporary control tower

    • B. 

      Navigation systems, heli pad, and a permanent control tower

    • C. 

      Navigation systems, weather systems, and a permanent control tower

    • D. 

      Navigation systems, weather systems, passenger services terminal, and permanent control tower

  • 9. 
    What is the most important part of being an air and space expeditionary force (AEF) Airman?
    • A. 

      Performing the responsibilites as prescribed in the unit type code (UTC)

    • B. 

      Performing the tasks of an airfield system technician

    • C. 

      Being flexible and able to adapt to your surroundings

    • D. 

      Being flexible and maintaining good health

  • 10. 
    When modulating the signal and carrier signal are combined within a modulator, the output signal contains
    • A. 

      Modulating signal, upper sideband, lower sideband

    • B. 

      Carrier, upper sideband, and lower sideband

    • C. 

      Upper sideband and modulating signal

    • D. 

      Carrier and modulating signal

  • 11. 
    If a carrier frequency of 1 MHz and a modulating tone of 10 kHz goes to the modulator, the output signals include
    • A. 

      1.01 MHz, 1 MHz, and 0.99 MHz

    • B. 

      1.1 MHz, 1 MHz, and 0.9 MHz

    • C. 

      1.11 MHz, 1 MHz, and 0.99 MHz

    • D. 

      1.111 MHz, 1 MHz, 0.999 MHz

  • 12. 
    Define bandwith in terms of radio frequency transmission
    • A. 

      The amount of data that can be carried from one point to another in a given period of time

    • B. 

      The amount of requency deviation divided by the frequency of the modulating signal

    • C. 

      The amount of change in the carrier frequency as a result of the modulation process

    • D. 

      The amount of space and the transmitted signal will occupy in the frequency spectrum

  • 13. 
    If the modulating audio signal is 10 kHz wide, what is the bandwidth of the transmitted amplitude modulated signal?
    • A. 

      5 kHz

    • B. 

      10 kHz

    • C. 

      15 kHz

    • D. 

      20 kHz

  • 14. 
    The bandwidth of an amplitude modulated signal is
    • A. 

      Two times the modulating signal

    • B. 

      The same as the modulating signal

    • C. 

      Determined by the modulation index

    • D. 

      Defined in terms of maximum amount of modulation

  • 15. 
    If an oscilloscope displays a modulation envelope having an Emax of 200 volts and an Emin of 20 volts, what is the modulation percentage?
    • A. 

      81.8

    • B. 

      85.8

    • C. 

      88

    • D. 

      122

  • 16. 
    Reducing modulation to less than 100 percent gives
    • A. 

      More total power

    • B. 

      A reduction in carrier power

    • C. 

      No reduction in carrier power

    • D. 

      A reduction in carrier and sideband power

  • 17. 
    The output of of the oscillator in a frequency modulation modulator increases in frequency with each
    • A. 

      Positive half cycle of the carrier

    • B. 

      Negative half cycle of the carrier

    • C. 

      Positive half cycle of the modulating signal

    • D. 

      Negative half cycle of the modulating signal

  • 18. 
    A 5 kHz modulating signal has enough peak voltage to cause a deviation of 15 kHz. What is the modulation index?
    • A. 

      5

    • B. 

      0.5

    • C. 

      0.3

    • D. 

      3

  • 19. 
    A narrow frequency band between adjacent stations to prevent frequency modulated sidebands from overlapping is called
    • A. 

      Space

    • B. 

      Guard band

    • C. 

      Buffer zone

    • D. 

      Prevention field

  • 20. 
    What modulation technique is used especially for data transmission?
    • A. 

      Phase

    • B. 

      Height

    • C. 

      Amplitude

    • D. 

      Frequency

  • 21. 
    In phase modulation, the carrier's
    • A. 

      Phase is shifted at the rate of the modulating signal

    • B. 

      Phase shifts below the rate of the modulating signal

    • C. 

      Amplitude is shifted at the rate of the modulating signal

    • D. 

      Amplitude is shifted with the phase of the modulating signal

  • 22. 
    In phase modulation, the amount of phase shift is
    • A. 

      Proportional to the frequency of the modulating signal

    • B. 

      Proportional to the amplitude of the modulating signal

    • C. 

      Inversely proportional to the frequency of the modulating signal

    • D. 

      Inversely proportional to the amplitude of the modulating signal

  • 23. 
    What is the first step in the pulse code modulation process?
    • A. 

      Descrete amplitudes are assigned to the sampling pulses

    • B. 

      A binary code number is assigned to the sample

    • C. 

      The quantizer limits the amplitude of the pulses

    • D. 

      The analog signal is band limited

  • 24. 
    What part of the pulse code modulation process converts a continuous time signal into a descrete time signal?
    • A. 

      Sampling

    • B. 

      Rectifying

    • C. 

      Oscillating

    • D. 

      Band limiting

  • 25. 
    What type of pulse modulation changes the amplitude of the pulse train to vary according to the amplitude of the input signal?
    • A. 

      Width

    • B. 

      Position

    • C. 

      Duration

    • D. 

      Amplitude