Es&t017

24 Questions | Total Attempts: 419

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Electronics Engineering Quizzes & Trivia

This QUIZ is made or by product of my continuous research & study about Electronics Engineering to help the Electronics Engineer/Technician Aspirants in passing the Board Examinations.


Questions and Answers
  • 1. 
    The real part of an antenna's input impedance is due to:
    • A. 

      The radiated signal

    • B. 

      The reflected signal

    • C. 

      The SWR

    • D. 

      All of the above

  • 2. 
    A half-wave dipole is sometimes called:
    • A. 

      A Marconi antenna

    • B. 

      A Hertz antenna

    • C. 

      A Yagi antenna

    • D. 

      None of the above

  • 3. 
    The end-to-end length of a half-wave dipole antenna is actually:
    • A. 

      One wavelength

    • B. 

      One half-wavelength

    • C. 

      Slightly longer than a half-wavelength

    • D. 

      Slightly shorter than a half-wavelength

  • 4. 
    The radiation of energy from an antenna can be seen in the:
    • A. 

      Standing wave pattern around the antenna

    • B. 

      SWR along the feed cable

    • C. 

      Radiation resistance of the antenna

    • D. 

      Power loss of the antenna

  • 5. 
    Measured on the ground, the field strength of a horizontally polarized half-wave dipole antenna is strongest:
    • A. 

      In one direction

    • B. 

      In two directions

    • C. 

      In all directions

    • D. 

      Depends on the number of elements

  • 6. 
    The ability of an antenna to radiate more energy in one direction than in other directions is called:
    • A. 

      Directivity

    • B. 

      Selectivity

    • C. 

      Active antenna

    • D. 

      Resonance

  • 7. 
    The front-to-back ratio of a half-wave dipole antenna is:
    • A. 

      0 dB

    • B. 

      3 dB

    • C. 

      10 dB

    • D. 

      Infinite

  • 8. 
    An antenna's beamwidth is measured:
    • A. 

      From +90° to –90°

    • B. 

      From front to back

    • C. 

      Between half-power points

    • D. 

      Between the minor side-lobes

  • 9. 
    ERP stands for:
    • A. 

      Equivalent Radiation Pattern

    • B. 

      Effective Radiation Pattern

    • C. 

      Equivalent Radiated Power

    • D. 

      Effective Radiated Power

  • 10. 
    "Ground Effects" refers to the effects on an antenna's radiation pattern caused by:
    • A. 

      Radio signals reflecting off the ground

    • B. 

      Buildings and other structures on the ground

    • C. 

      Fading

    • D. 

      Faulty connection of the feed cable ground

  • 11. 
    A 1-MHz monopole antenna must be:
    • A. 

      Mounted vertically

    • B. 

      Mounted horizontally

    • C. 

      At least one half-wavelength long

    • D. 

      At least one wavelength long

  • 12. 
    The typical antenna in an AM radio is a:
    • A. 

      Dipole

    • B. 

      Folded dipole

    • C. 

      Ferrite "loop-stick"

    • D. 

      None of the above

  • 13. 
    The polarization of plane waves received from a satellite is changed by:
    • A. 

      Gamma rays

    • B. 

      Faraday Rotation

    • C. 

      Helical rotation

    • D. 

      The distance traveled

  • 14. 
    A nonresonant antenna:
    • A. 

      Will not transmit

    • B. 

      Will not receive

    • C. 

      Will cause SWR on the feed cable

    • D. 

      All of the above

  • 15. 
    At resonance, the input impedance to a lossless antenna should be:
    • A. 

      Resistive

    • B. 

      Inductive

    • C. 

      Capacitive

    • D. 

      Infinite

  • 16. 
    An antenna can be matched to a feed line using:
    • A. 

      A shorted stub

    • B. 

      A loading coil

    • C. 

      An LC network

    • D. 

      All of the above

  • 17. 
    As the length of a "long-wire" antenna is increased:
    • A. 

      The number of lobes increases

    • B. 

      The number of nodes decreases

    • C. 

      Efficiency decreases

    • D. 

      None of the above

  • 18. 
    Arrays can be:
    • A. 

      Phased

    • B. 

      Driven

    • C. 

      Parasitic

    • D. 

      All of the above

  • 19. 
    An array with one driven element, a reflector, and one or more directors is called a:
    • A. 

      Marconi

    • B. 

      Yagi

    • C. 

      Log-Periodic Dipole

    • D. 

      Stacked array

  • 20. 
    LPDA stands for:
    • A. 

      Low-Power Dipole Array

    • B. 

      Low-Power Directed Array

    • C. 

      Log-Periodic Dipole Array

    • D. 

      Log Power Dipole Array

  • 21. 
    The radiated beam from a parabolic "dish" transmitting antenna is:
    • A. 

      Collimated

    • B. 

      Phased

    • C. 

      Dispersed

    • D. 

      None of the above

  • 22. 
    The energy picked up by a parabolic antenna is concentrated at the:
    • A. 

      Center

    • B. 

      Edges

    • C. 

      Focus

    • D. 

      Horn

  • 23. 
    Antennas are often tested in:
    • A. 

      An echo chamber

    • B. 

      An anechoic chamber

    • C. 

      A vacuum chamber

    • D. 

      An RF reflective chamber

  • 24. 
    Field strength at a distance from an antenna is measured with:
    • A. 

      A slotted line

    • B. 

      A dipole

    • C. 

      An EIRP meter

    • D. 

      A field-strength meter

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