Electronic Communication Quiz: Test!
(134).jpg "Electronic Communication Quiz: Test!")
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- 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
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