This is the Multiple Choice Questions (MCQs) in Chapter 32: Wireless and Personal Communications Systems from the book Teach Yourself Electricity and Electronics, 5th edition by Stan Gibilisco. If you are looking for a reviewer in Electronics Engineering this will definitely help you before taking the Board Exam.
Start Practice Exam Test Questions
⇐ Gibilisco: MCQ in Acoustics, Audio, and High Fidelity | ECE Board Exam
Choose the letter of the best answer in each questions.
1. A network that employs one powerful central computer and several PCs is called:
A. A wireless network.
B. A local-area network.
C. A client-server network.
D. A peer-to-peer network.
Answer: Option C
Solution:
2. Infrared and optical wireless links work best:
A. Over distances exceeding 1000 miles.
B. On a line of sight.
C. At low radio frequencies.
D. In situations with high levels of noise.
Answer: Option B
Solution:
3. Which of the following devices or systems is not generally considered wireless?
A. A remote-control garage-door opener.
B. An amateur radio station.
C. A beeper/pager.
D. A telephone set that requires a wall jack.
Answer: Option D
Solution:
4. A noise blanker can improve the quality of:
A. Radio reception.
B. Radio transmission.
C. Infrared reception.
D. Infrared transmission.
Answer: Option A
Solution:
5. In the United States, a license is required for:
A. Receiving on amateur-radio frequencies.
B. Transmitting on amateur-radio frequencies.
C. Using infrared wireless devices.
D. Using a wireless automobile security system.
Answer: Option B
Solution:
6. Noise in a wireless receiver can be minimized by:
A. Raising the temperature to very high values.
B. Reducing the temperature to very low values.
C. Maximizing the amplification.
D. Minimizing the relative humidity.
Answer: Option B
Solution:
7. As the data speed increases in a wireless system, all other factors being equal:
A. The signal bandwidth increases.
B. The signal bandwidth decreases.
C. The overall noise level increases.
D. The overall noise level decreases.
Answer: Option A
Solution:
8. The term shortwave, in reference to radio, refers to signals having
wavelengths of approximately:
A. 10 to 100 millimeters.
B. 100 millimeters to 1 meter.
C. 1 to 10 meters.
D. 10 to 100 meters.
Answer: Option D
Solution:
9. In general, as the noise level in a wireless system increases:
A. Stronger incoming signals are needed to overcome it.
B. Weaker signals can be received.
C. The temperature of the system rises.
D. The bandwidth of the system increases.
Answer: Option A
Solution:
10. In a spectrum analyzer, the horizontal axis shows:
A. Voltage.
B. Power.
C. Frequency.
D. Time.
Answer: Option C
Solution:
11. A device consisting of a receiver and transmitter in the same box is called a:
A. Modem.
B. Transverter.
C. Transceiver.
D. Transponder.
Answer: Option C
Solution:
12. The use of direction-finding equipment to determine the latitude and longitude of a radio transmitter is an example of:
A. Radiolocation.
B. IR wireless.
C. The Global Positioning System.
D. Packet radio.
Answer: Option A
Solution:
13. A LAN in which each user’s computer stores its own data is called:
A. A wireless LAN.
B. A wide-area LAN.
C. LAN topology.
D. A peer-to-peer LAN.
Answer: Option D
Solution:
14. Which of the following constitutes illegal use of ham radio?
A. Selling cars by broadcasting prices to other hams.
B. Talking about the weather and exchanging local forecasts.
C. Talking about who might be the next president of the United States.
D. Connecting a radio to the Internet.
Answer: Option A
Solution:
15. An electromagnetic wave can be considered to fall in the shortwave band if its free-space wavelength is:
A. 55 kilometers.
B. 55 meters.
C. 55 centimeters.
D. 55 millimeters.
Answer: Option B
Solution:
16. In a cellular network, a base station is sometimes called a:
A. Transceiver.
B. Cell.
C. Repeater.
D. Cell phone.
Answer: Option C
Solution:
17. An advantage of conventional hard-wired telephone over cellular is:
A. Privacy.
B. Portability.
C. Ease of use in a car.
D. LAN topology.
Answer: Option A
Solution:
18. An advantage of cellular over conventional hard-wired telephone is:
A. Security.
B. Lower cost.
C. Mobility.
D. Data speed.
Answer: Option C
Solution:
19. Infrared waves are:
A. Longer than radio waves.
B. Longer than visible-light waves.
C. Shorter than visible-light waves.
D. Inaccurately named; they are really heat rays.
Answer: Option B
Solution:
20. The GPS might be useful:
A. For improving the performance of a LAN.
B. For increasing the data speed in a wireless system.
C. For minimizing noise in a wireless system.
D. To a motorist who is lost.
Answer: Option D
Solution:
Topics Included in the Test from Chapter 31 to Chapter 34
Complete List of Multiple Choice Questions from this Book
Check your work.
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