This is the Multiple Choice Questions (MCQs) in Chapter 27: Data Reception 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 Data Transmission | ECE Board Exam
Choose the letter of the best answer in each questions.
1. The reflected wave in a radio signal:
A. Travels less distance than the direct wave.
B. Travels just as far as the direct wave.
C. Travels farther than the direct wave.
D. Might travel less far than, just as far as, or farther than the direct wave.
Answer: Option C
Solution:
2. The reflected wave:
A. Arrives in phase with the direct wave.
B. Arrives out of phase with the direct wave.
C. Arrives in a variable phase compared with the direct wave.
D. Is horizontally polarized.
Answer: Option C
Solution:
3. The ionospheric layer that absorbs radio waves is:
A. The D layer.
B. The E layer.
C. The F layer.
D. No layers ever absorb radio waves.
Answer: Option D
Solution:
4. The highest layer of the ionosphere is:
A. The D layer.
B. The E layer.
C. The F layer.
D. Dependent on the time of day and the solar cycle.
Answer: Option C
Solution:
5. Radio waves that curve earthward in the lower atmosphere are being affected by:
A. Troposcatter.
B. The D layer.
C. Ionospheric ducting.
D. Tropospheric bending.
Answer: Option D
Solution:
6. Single-sideband can be demodulated by:
A. An envelope detector.
B. A diode.
C. A BFO and mixer.
D. A ratio detector.
Answer: Option C
Solution:
7. A diode and capacitor can be used to detect:
A. CW.
B. AM.
C. SSB.
D. FSK.
Answer: Option B
Solution:
8. The S + N/N ratio is a measure of.
A. Sensitivity.
B. Selectivity.
C. Dynamic range.
D. Adjacent-channel rejection.
Answer: Option A
Solution:
9. The ability of a receiver to perform in the presence of strong signals is a consequence of its:
A. Sensitivity.
B. Noise figure.
C. Dynamic range.
D. Adjacent-channel rejection.
Answer: Option C
Solution:
10. A receiver that responds to a desired signal, but not to one very nearby in frequency, has good:
A. Sensitivity.
B. Noise figure.
C. Dynamic range.
D. Adjacent-channel rejection.
Answer: Option D
Solution:
11. An AM receiver can be used to demodulate FM by means of:
A. Envelope detection.
B. Product detection.
C. Slope detection.
D. Pulse detection.
Answer: Option C
Solution:
12. An FM detector with built-in limiting is:
A. A ratio detector.
B. A discriminator.
C. An envelope detector.
D. A product detector.
Answer: Option A
Solution:
13. Time-division multiplex is often done with:
A. AM.
B. FM.
C. FSK.
D. PM.
Answer: Option D
Solution:
14. A continuously variable signal is recovered from a signal having discrete states by:
A. A ratio detector.
B. A D/A converter.
C. A product detector.
D. An envelope detector.
Answer: Option B
Solution:
15. Digital modulation is superior to analog modulation in the sense that:
A. Analog signals have discrete states, while digital ones vary continuously.
B. Digital signals resemble noise less than analog ones.
C. Digital signals are easier to use with FM.
D. Digital signals have greater bandwidth.
Answer: Option B
Solution:
16. A product detector would most often be used to receive:
A. AM.
B. CW.
C. FM.
D. None of the above.
Answer: Option B
Solution:
17. To receive UHF signals on a shortwave receiver, you would need:
A. A heterodyne detector.
B. A product detector.
C. An up converter.
D. A down converter.
Answer: Option D
Solution:
18. Image rejection in a superheterodyne receiver is enhanced by:
A. Front-end selectivity.
B. A product detector.
C. A variable LO.
D. A sensitive IF amplifier chain.
Answer: Option A
Solution:
19. A low IF is not practical with a single-conversion receiver because:
A. Product detection cannot be used.
B. The image frequency would be too close to the incoming-signal frequency.
C. Sensitivity would be impaired.
D. Adjacent-channel rejection would be poor.
Answer: Option B
Solution:
20. Digital signal processing can be used to advantage with:
A. SSB.
B. SSTV.
C. FSK.
D. Any of the above.
Answer: Option D
Solution:
Topics Included in the Test from Chapter 19 to Chapter 30
Complete List of Multiple Choice Questions from this Book
Check your work.
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