3D1X3 CDC Volume 2 Ure

100 Questions | Total Attempts: 1413

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3d1x3 Quizzes & Trivia

The second one lol.


Questions and Answers
  • 1. 
    (201)  Equipment used for generating, amplifying, and transmitting RF carrier is collectively called
    • A. 

      A receiver.

    • B. 

      An antenna.

    • C. 

      A transmitter.

    • D. 

      A transmission line.

  • 2. 
    (201)  What basic receiver function involves having the transmitted electromagnetic wave pass through the receive antenna in such a manner as to induce a voltage in the antenna?
    • A. 

      Reproduction.

    • B. 

      Reception.

    • C. 

      Detection.

    • D. 

      Selection.

  • 3. 
    (201)  The ability to reproduce the input signal accurately is the characteristics of the receiver's
    • A. 

      Fidelity.

    • B. 

      Capacity.

    • C. 

      Sensitivity.

    • D. 

      Selectivity.

  • 4. 
    (202)  A combination of a transmitter and receiver that is built as a single unit and sharing common tuned circuits is called a
    • A. 

      Transmitter.

    • B. 

      Transceiver.

    • C. 

      Receiver.

    • D. 

      Coupler.

  • 5. 
    (202)  Which of the following cannot be performed by the transceiver's computerized components and micro-circuitry?
    • A. 

      Specific equipment faults.

    • B. 

      Internal equipment tests.

    • C. 

      Internal calibrations.

    • D. 

      Repair itself.

  • 6. 
    (203)  A transmission line that consists of a center conductor placed inside a metal tube functioning as the outer tube is called a
    • A. 

      Flexible coaxial cable.

    • B. 

      Rigid coaxial cable.

    • C. 

      Waveguide.

    • D. 

      Twin lead.

  • 7. 
    (203)  Which selection best describes the term "cutoff frequency" when discussing transmission line properties?
    • A. 

      The frequency where XL becomes to low that the signal is shunted.

    • B. 

      The frequency where XC causes the signal to be shunted.

    • C. 

      The lowest frequency that the line can pass successfully.

    • D. 

      The frequency at which standing waves are maximum.

  • 8. 
    (203)  Using figure 1-10, determine the wavelength if the frequency is changed from 150 MHz to 250 MHz.
    • A. 

      12.0 meters.

    • B. 

      3.0 meters.

    • C. 

      1.5 meters.

    • D. 

      1.2 meters.

  • 9. 
    (203)  Using figure 1-10, determine the electrical length if the frequency is changed from 150 MHz to 250 MHz.
    • A. 

      8.33 meters.

    • B. 

      8.33 wavelengths.

    • C. 

      83.3 meters.

    • D. 

      83.3 wavelengths.

  • 10. 
    (203)  A nonresonant transmission line is a line
    • A. 

      Having reflected waves.

    • B. 

      Having no reflected waves.

    • C. 

      With maximum voltage across its open termination.

    • D. 

      With maximum voltages across its shorted termination.

  • 11. 
    (203)  If a transmission line is terminated in a short
    • A. 

      Current is at maximum and voltage at minimum at the termination.

    • B. 

      Current is at minimum and voltage at maximum at the termination.

    • C. 

      There would be a nominal amount of signal gain.

    • D. 

      The line would be nonresonant.

  • 12. 
    (204)  In a basic communication system, what converts radio frequency (RF) energy's current oscillation into electric and magnetic fields of force?
    • A. 

      Antenna.

    • B. 

      Coupler.

    • C. 

      Transmitter.

    • D. 

      Transmission lines.

  • 13. 
    (204)  The concept that alternation current (AC) changes in magnitude and reverses its direction during each cycle is
    • A. 

      An unproven hypothesis.

    • B. 

      The definition of propagation.

    • C. 

      What makes radio transmission possible.

    • D. 

      What led to the discovery of direct current.

  • 14. 
    (205)  If the electric field component travels in a plane perpendicular to the Earth's surface, the radio wave is
    • A. 

      Magnetically polarized.

    • B. 

      Horizontally polarized.

    • C. 

      Circularly polarized.

    • D. 

      Vertically polarized.

  • 15. 
    (205)  What types of polarization do satellite terminals transmit and receive?
    • A. 

      Transmit horizontal and receive vertical polarizations.

    • B. 

      Transmit vertical and receive horizontal polarizations.

    • C. 

      Transmit right hand and receive left hand circular polarizations.

    • D. 

      Transmit left hand and receive right hand circular polarizations.

  • 16. 
    (206)  What measurement is used to determine whether an antenna is resonant at a particular frequency?
    • A. 

      Distortion.

    • B. 

      Standing wave ratio.

    • C. 

      Signal-to-noise ratio.

    • D. 

      Percent of modulation.

  • 17. 
    (206)  The ability of an antenna to both receive and transmit equally well is known as the antenna's
    • A. 

      Bandwidth.

    • B. 

      Resonance.

    • C. 

      Reciprocity.

    • D. 

      Effectiveness.

  • 18. 
    (206)  The standard used to measure the radiating effectiveness (gain) of an antenna system is the
    • A. 

      Marconi antenna.

    • B. 

      Isotropic antenna.

    • C. 

      Hertz antenna.

    • D. 

      Whip antenna.

  • 19. 
    (206)  What does the effectiveness of an entire transmitting and receiving system depend largely upon?
    • A. 

      Impedance matching.

    • B. 

      Antenna distance.

    • C. 

      Antenna properties.

    • D. 

      Line characteristics.

  • 20. 
    (207)  Which antenna radiates radio energy in a circular pattern?
    • A. 

      Omnidirectional.

    • B. 

      Unidirectional.

    • C. 

      Bidirectional.

    • D. 

      Directional.

  • 21. 
    (207)  Which antenna type is usually used on long-range, point-to-point circuits where the concentrated radio energy is needed for circuitry reliability?
    • A. 

      Omnidirectional.

    • B. 

      Unidirectional.

    • C. 

      Bidirectional.

    • D. 

      Circular.

  • 22. 
    (208)  Ungrounded lengths of wire specifically designed to be either a half-wavelength or more than a full wavelength long is called a
    • A. 

      Reflector.

    • B. 

      Hertz antenna.

    • C. 

      Marconi antenna.

    • D. 

      Vertical monopole.

  • 23. 
    (209)  A long-wire's takeoff angle depends on the antenna's
    • A. 

      Length.

    • B. 

      Directivity.

    • C. 

      Front-to-back ratio.

    • D. 

      Standing wave ratio.

  • 24. 
    (209)  All antennas used in satellite communications are designed to be
    • A. 

      Circular directional.

    • B. 

      Omnidirectional.

    • C. 

      Bidirectional.

    • D. 

      Directional.

  • 25. 
    (209)  A commmon satellite antenna is the
    • A. 

      Whip.

    • B. 

      Discone.

    • C. 

      Parabolic.

    • D. 

      Long-wire.