Technology Today and Tomorrow ©2004

Chapter 6: Telecommunication

Telecommunication

1.
Telecommunication means
A)mass communication.
B)communicating over a long distance.
C)communicating using pictures.
D)communicating using codes.
2.
The communication channel between a cellular phone user and the nearest cellular tower
A)consists of magnetic variance.
B)consists of static electricity.
C)consists of sound waves.
D)consists of radio waves.
3.
The term cellular in cellular telephone refers to
A)an analogy with cells in an organism.
B)memory pages in a switching system computer.
C)service operating areas called cells.
D)early trials held in prison cells.
4.
Copper wire pairs, coaxial cable, and optical fibers are all types of
A)output devices.
B)microprocessors.
C)cladding.
D)transmission channels.
5.
Which of the following is not true of optical fibers?
A)They help reduce background noises.
B)They can each carry 100 voice or data circuits.
C)They are made of flexible glass.
D)They take up relatively little space.
6.
The strength of a wave, as represented by its height, is called
A)frequency.
B)demodulation.
C)amplitude.
D)modulation.
7.
The number of waves that pass a fixed point in one second is referred to as
A)frequency.
B)modulation.
C)amplitude.
D)boosting.
8.
Which statement about radio waves and microwaves is true?
A)They are the same kinds of waves as sound waves.
B)Like all waves, they must have solid material to travel through.
C)They have no definable wave motion.
D)They are electromagnetic waves used in telecommunications.
9.
Which statement about digital television technology is not true?
A)Digital TV offers many features but no improvement of resolution.
B)Digital TV is having a large influence on broadcasting.
C)Digital TV technology will eventually make analog TVs obsolete.
D)Digital TVs are like televisions combined with computers.
10.
What elements are absolutely necessary for satellite communications?
A)satellites in geostationary orbits and earth stations
B)moon satellites and earth satellites
C)satellites in roving orbits and earth stations
D)satellites and polar earth stations
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