Electronic Communication Quiz: Test!

32 Questions | Total Attempts: 2422

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Electronic Communication Quiz: Test!

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Questions and Answers
  • 1. 
    Communication is the process of:
    • A. 

      Keeping in touch

    • B. 

      Broadcasting

    • C. 

      Exchanging information

    • D. 

      Entertainment by electronics

  • 2. 
    Two key barriers to human communications are:
    • A. 

      Distance and Language

    • B. 

      Ignorance

  • 3. 
    Electronic communications were discovered in which century?
    • A. 

      Sixteenth

    • B. 

      Eighteenth

    • C. 

      Nineteenth

    • D. 

      Twentieth

  • 4. 
    Which of the following is not a major communications medium?
    • A. 

      Free space

    • B. 

      Water

    • C. 

      Wires

    • D. 

      Fiber optic cable

  • 5. 
    Random interference to transmitted signals is called:
    • A. 

      Adjacent channel overlap

    • B. 

      Cross talk

    • C. 

      Garbage-in-garbage-out

    • D. 

      Noise

  • 6. 
    The communications medium causes the signal to be:
    • A. 

      Amplified

    • B. 

      Modulated

    • C. 

      Attenuated

    • D. 

      Interfered with

  • 7. 
    Which of the following is not a source of the noise?
    • A. 

      Another communications signal

    • B. 

      Atmospheric effects

    • C. 

      Manufactured electrical systems

    • D. 

      Thermal agitation in electronic components

  • 8. 
    One-way communications are called:
    • A. 

      Half-duplex

    • B. 

      Full duplex

    • C. 

      Monocomm

    • D. 

      Simplex

  • 9. 
    Simultaneous two-way communications are called:
    • A. 

      Half duplex

    • B. 

      Full duplex

    • C. 

      Bicomm

    • D. 

      Simplex

  • 10. 
    The original electrical information signal to be transmitted is called:
    • A. 

      Modulating signal

    • B. 

      Carrier

    • C. 

      Baseband signal

    • D. 

      Source signal

  • 11. 
    The process of modifying a high-frequency carrier with the information to be transmitted is called:
    • A. 

      Multiplexing

    • B. 

      Telemetry

    • C. 

      Detection

    • D. 

      Modulation

  • 12. 
    The process of transmitting two or more information signals simultaneously over the same channel is called:
    • A. 

      Multiplexing

    • B. 

      Telemetry

    • C. 

      Mixing

    • D. 

      Modulation

  • 13. 
    Continuous voice or video signals are referred to as being:
    • A. 

      Baseband

    • B. 

      Analog

    • C. 

      Digital

    • D. 

      Continuous wave

  • 14. 
    Recovering information from a carrier is known as:
    • A. 

      Demultiplexing

    • B. 

      Modulation

    • C. 

      Detection

    • D. 

      Carrier Recovery

  • 15. 
    Transmission of graphical information over the telephone network is accomplished by:
    • A. 

      Television

    • B. 

      CATV

    • C. 

      Videotext

    • D. 

      Facsimile

  • 16. 
    Measuring physical conditions at some remote location and transmitting this data for analysis is the process of:
    • A. 

      Telemetry

    • B. 

      Instrumentation

    • C. 

      Modulation

    • D. 

      Multiplexing

  • 17. 
    Receiving electromagnetic emissions from stars is called:
    • A. 

      Astrology

    • B. 

      Optical astronomy

    • C. 

      Radio astronomy

    • D. 

      Space surveillance

  • 18. 
    A personal communications hobby for individuals is:
    • A. 

      Ham radio

    • B. 

      Electronic bulletin board

    • C. 

      CB radio

    • D. 

      Cellular radio

  • 19. 
    Radar is based upon:
    • A. 

      Microwaves

    • B. 

      A water medium

    • C. 

      The directional nature of radio signals

    • D. 

      Reflected radio signals

  • 20. 
    A frequency of 27 MHz has a wavelength of approximately:
    • A. 

      11m

    • B. 

      27m

    • C. 

      30m

    • D. 

      81m

  • 21. 
    Radio signals are made up of:
    • A. 

      Voltage and currents

    • B. 

      Electric and magnetic fields

    • C. 

      Electrons and protons

    • D. 

      Noise and data

  • 22. 
    The voice frequency range is:
    • A. 

      30 to 300 Hz

    • B. 

      300 to 3000 Hz

    • C. 

      20 Hz to 20 KHz

    • D. 

      0 Hz to 15 KHz

  • 23. 
    Another name for signals in the HF range is:
    • A. 

      Microwaves

    • B. 

      RF waves

    • C. 

      Short waves

    • D. 

      Millimeter waves

  • 24. 
    Television broadcasting occurs in what ranges?
    • A. 

      HF

    • B. 

      EHF

    • C. 

      VHF

    • D. 

      UHF

  • 25. 
    Electromagnetic waves produced primarily by heat is called:
    • A. 

      Infrared rays

    • B. 

      Microwaves

    • C. 

      Shortwaves

    • D. 

      X-rays