CDC 3D156 Volume 1

41 Questions | Total Attempts: 70

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CDC Quizzes & Trivia

CDC URE Test


Questions and Answers
  • 1. 
    What AFMAN lists the specific duties of the Airfield Systems technician?
    • A. 

      36-2108

    • B. 

      36-2101

    • C. 

      21-116

    • D. 

      11-225

  • 2. 
    How much electric current is of sufficient intensity to prevent voluntary control of muscles?
    • A. 

      15 mA

    • B. 

      14 mA

    • C. 

      12 mA

    • D. 

      10 mA

  • 3. 
    What is the minimum amount of electric current needed to be fatal?
    • A. 

      10 mA

    • B. 

      100 mA

    • C. 

      125 mA

    • D. 

      150 amps

  • 4. 
    What poisonous substances can eat away flesh on contact?
    • A. 

      Inflammables

    • B. 

      Electrolytes

    • C. 

      Corrosives

    • D. 

      Irritants

  • 5. 
    General-purpose detergents (spray and wipe) used in most work centers are
    • A. 

      Corrosive

    • B. 

      Eye irritants

    • C. 

      Skin irritants

    • D. 

      Respiratory irritants

  • 6. 
    In addition to the eyes, what organs of the body is/are susceptible to overexposure to radio frequency (RF) radiation? 
    • A. 

      Brain

    • B. 

      Kidneys

    • C. 

      Appendages

    • D. 

      Reproductive Organs

  • 7. 
    The two categories of hazards that are considered human factors are
    • A. 

      Job related and domestic

    • B. 

      Physical and emotional

    • C. 

      Job related and mental

    • D. 

      Mental and physical

  • 8. 
    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

  • 9. 
    The weather-related hazards of climbing are rain, wind and
    • A. 

      Ice

    • B. 

      Cold

    • C. 

      Snow

    • D. 

      Lightning

  • 10. 
    While climbing, the hazard posed by bulky clothing is
    • A. 

      Decreased flexibility increasing your chances of slipping

    • B. 

      Getting snagged and losing your balance

    • C. 

      Ripping your clothing

    • D. 

      Heat related stress

  • 11. 
    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 service terminal, and a permanent control tower

  • 12. 
    At a fixed base, what must always be in the forefront of your mind?
    • A. 

      Maintaining inspection and maintenance records

    • B. 

      Readiness to deploy and support the air and space expeditionary force (AEF) needs

    • C. 

      Supervising airfield systems maintenance activities

    • D. 

      Performing preventive maintenance on airfield systems

  • 13. 
    What determines the type of eqiupment used at a deployed base?
    • A. 

      Unit type code (UTC)

    • B. 

      Chief of maintenance

    • C. 

      Mission of the base

    • D. 

      Air Force Manual (AFMAN) 36-2108

  • 14. 
    What is the most important part of being an air expeditionary force (AEF) airman?
    • A. 

      Performing only the responsibilities as prescribed in the unit type code (UTC)

    • B. 

      Performing only the tasks of an Airfield Systems Technician

    • C. 

      Being flexible and able to adapt to your surroundings

    • D. 

      Being flexible and maintaining good health

  • 15. 
    When the modulating signal and carrier signal are combined within a modulator, the output signal contains
    • A. 

      Modulating signal, upper sideband, and lower sideband

    • B. 

      Carrier, upper sideband, and lower sideband

    • C. 

      Upper sideband and modulating signal

    • D. 

      Carrier and modulating signal

  • 16. 
    If a carrier frequency of 1 megahertz (MHz) and a modulating tone of 10 kilohertz (kHz) goes to the modulator, the output signal include
    • A. 

      1.01 MHz, 1 MHz, and 0.99 MHz

    • B. 

      1.1 MHz, 1 MHz, 0.9 MHz

    • C. 

      1.11 MHz, 1 MHz, 0.99 MHz

    • D. 

      1.111 MHZ, 1 MHz, 0.999 MHz

  • 17. 
    The bandwidth of an amplitude modulation signal refers to the amount of
    • A. 

      Data that can be carried from one point to another in a given period of time

    • B. 

      Frequency deviation divided by the frequency of the modulating signal

    • C. 

      Change in the carrier frequency as a result of the modulation process

    • D. 

      Space the transmitted signal will occupy in the frequency spectrum

  • 18. 
    If an oscilloscope displays a modulation envelope having Emax of 200 volts and an Emin of 20 volts, what is the modulation percentage?
    • A. 

      81.8

    • B. 

      85.5

    • C. 

      88

    • D. 

      122

  • 19. 
    Which statement concerning bandwidth is true?
    • A. 

      Overmodulating increases bandwidth due to the production of harmonics

    • B. 

      Undermodulating increases bandwidth due to the production of harmonics

    • C. 

      Overmodulating increases bandwidth due to the output's increased amplitude

    • D. 

      Undermodulating increases bandwidth due to the output's decreased amplitude

  • 20. 
    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

  • 21. 
    The output of the oscillator in a frequency modulation (FM) 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

  • 22. 
    In frequency modulation (FM), the amount of the oscillator frequency change is
    • A. 

      Inversely proportional to the amplitude of the modulating signal

    • B. 

      Directly proportional to the amplitude of the modulating signal

    • C. 

      Inversely proportional to the phase of the modulating signal

    • D. 

      Directly proportional to the phase of the modulating signal

  • 23. 
    In frequency modulation, sidebands are considered significant when containing at least what percent of total transmitted power?
    • A. 

      1

    • B. 

      3

    • C. 

      10

    • D. 

      12

  • 24. 
    What is the formula to finf the modulating index?
    • A. 

      Deviation divided by frequency of modulation

    • B. 

      Deviation times frequency of modulation

    • C. 

      Sideband divided by carrier frequency

    • D. 

      Sideband times carrier frequency

  • 25. 
    A 5 kilohertz (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

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