CDC 2EX5X Communications-electronics Journeyman Part 2

140 Questions | Total Attempts: 526

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CDC Quizzes & Trivia

Contiuation of 2EX5X Pretest Part 1.


Questions and Answers
  • 1. 
    What principle does the time domain reflectometer use to test cables?
    • A. 

  • 2. 
    What secondary cell is prone to the "memory effect"?
    • A. 

  • 3. 
    What part of the power generation process allows a smooth transition of electrical current between multiple sources and the load?
    • A. 

  • 4. 
    What deployable communication system is a state of the art ground-to-ground communications infrastructure designed to exchanged secure and non-secure voice, data, and video communications via line of sight, satellite, or hard wired resources?
    • A. 

  • 5. 
    What are the two sampling techniques of a digital storage oscilloscope?
    • A. 

      Real-time and repetitive sampling

    • B. 

      Real-time and averaging sampling

    • C. 

      Repetitive and averaging sampling

    • D. 

      Linear and averaging sampling

  • 6. 
    What are the two types of intepolation?
    • A. 

      Real-time and linear

    • B. 

      Real-time and sine

    • C. 

      Sine and Linear

    • D. 

      Sine and Repetitive

  • 7. 
    Which is not a type of acquisition mode on the digital storage oscilloscope?
    • A. 

      Sample Mode

    • B. 

      Repetitive Mode

    • C. 

      Peak Detection Mode

    • D. 

      Averaging Mode

  • 8. 
    What is teh frequency range of an audio signal generator?
    • A. 

      10Hz to 10kHz

    • B. 

      20Hz to 20kHz

    • C. 

      10kHz to 10GHz

    • D. 

      20kHz to 35MHz

  • 9. 
    Which one of these is not an application of a radio frequency generator?
    • A. 

      Verifying transmitter frequencies

    • B. 

      Troubleshooting receivers

    • C. 

      Checking antenna systems

    • D. 

      Aligning galvanometers

  • 10. 
    A radio frequency generator is used to
    • A. 

      Monitor odd harmonics

    • B. 

      Align telemetry receivers

    • C. 

      Modulate subcarrier oscillators

    • D. 

      Check galvanometer frequency response

  • 11. 
    What is the variable voltage range of signals output from the HP 3325B synthesizer/function generator?
    • A. 

      1 mV to 10 V peak-to-peak

    • B. 

      1 mV to 10V peak

    • C. 

      1 V to 10V peak-to-peak

    • D. 

      1V to 10V peak

  • 12. 
    The output of the HP 3325B function generator may generate only DC voltages, to a maximum of
    • A. 

      +/- 1V

    • B. 

      +/- 4.5V

    • C. 

      +/- 5V

    • D. 

      +/- 10V

  • 13. 
    In using the phase modulation controls of the HP3325B function generator, an input of a +/- 5 V peak would result in what approximate phase deviation?
    • A. 

      +/- 42.5 degrees per volt for sine wave

    • B. 

      +/- 42.5 degrees per volt for square wave

    • C. 

      +/- 425 degrees per volt for sine wave

    • D. 

      +/- 425 degrees per volt for square wave

  • 14. 
    The 10:1 power ratio represented by 1 bel can also be represented by how many decibels (db)?
    • A. 

      1 dB

    • B. 

      3dB

    • C. 

      6 dB

    • D. 

      10 dB

  • 15. 
    A power reading that uses the abbreviation dBm indicates the
    • A. 

      Ratio of decibels relative to a 1-milliwatt standard

    • B. 

      Ratio of decibels relative to a 1-megawatt standard

    • C. 

      Actual power level expressed in milliwatts

    • D. 

      Actual power level expressed in megawatts

  • 16. 
    The measurable frequency and power ranges of the HP 436A power meter are determined by the
    • A. 

      Digital display

    • B. 

      Power sensor

    • C. 

      Power meter

    • D. 

      Interface

  • 17. 
    During what operation is the radio frequency blanking output used on the HP 436A power meter?
    • A. 

      While in WATT mode operation

    • B. 

      While in REMOTE mode operation

    • C. 

      During the automatice zeroing operation

    • D. 

      During calibration adjustment operation

  • 18. 
    Which measurements is not made with a spectrum analyzer?
    • A. 

      Frequency stability

    • B. 

      Peak-peak voltage

    • C. 

      Amplitude modulation

    • D. 

      Subcarrier oscillator output

  • 19. 
    Which measurements do you make with a spectrum analyzer?
    • A. 

      Subcarrier oscillator outputs

    • B. 

      Transducer output voltage

    • C. 

      Time between two events

    • D. 

      Pulse width

  • 20. 
    Which electronic counter measurement do you make with a spectrum analyzer?
    • A. 

      Period

    • B. 

      Scaling

    • C. 

      Frequency

    • D. 

      Time interval

  • 21. 
    Which electronic counter measurement counts the number of bits in a pulse train?
    • A. 

      Period

    • B. 

      Scaling

    • C. 

      Totalize

    • D. 

      Time interval

  • 22. 
    Which are the correct four classes of electronic counters?
    • A. 

      Frequency counters, time counters, microwave counters, and reciprocal counters

    • B. 

      Frequency counters, universal counters, microwave counters, and reciprocal counters

    • C. 

      Frequency counters, universal counters, period counters, and reciprocal counters

    • D. 

      Scaling counters, universal counters, microwave counters, and reciprocal counters

  • 23. 
    Which push-button(s)  would you select to get 125 ohm impedance on the time domain reflectometer?
    • A. 

      None

    • B. 

      75 ohm only

    • C. 

      125 ohm only

    • D. 

      50 ohm and 75 ohm

  • 24. 
    What tye of deflection return on the TDR CRT would indicate a cable "short?'
    • A. 

      No "pip"

    • B. 

      Smear "pip"

    • C. 

      Upward deflections "pip"

    • D. 

      Downward deflections "pip"

  • 25. 
    While using a time domain reflectometer (TDR), what cable fault causes delays in pulses of propagation velocity making accurate measurements difficult?
    • A. 

      Short

    • B. 

      Open

    • C. 

      Grounded

    • D. 

      Moisture in cables

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