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
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.
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.
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.
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.
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.
6. Single-sideband can be demodulated by:
- A. An envelope detector.
- B. A diode.
- C. A BFO and mixer.
- D. A ratio detector.
7. A diode and capacitor can be used to detect:
- A. CW.
- B. AM.
- C. SSB.
- D. FSK.
8. The S + N/N ratio is a measure of.
- A. Sensitivity.
- B. Selectivity.
- C. Dynamic range.
- D. Adjacent-channel rejection.
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.
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.
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.
12. An FM detector with built-in limiting is:
- A. A ratio detector.
- B. A discriminator.
- C. An envelope detector.
- D. A product detector.
13. Time-division multiplex is often done with:
- A. AM.
- B. FM.
- C. FSK.
- D. PM.
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.
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.
16. A product detector would most often be used to receive:
- A. AM.
- B. CW.
- C. FM.
- D. None of the above.
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.
18. Image rejection in a superhet receiver is enhanced by:
- A. Front-end selectivity.
- B. A product detector.
- C. A variable LO.
- D. A sensitive IF amplifier chain.
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.
20. Digital signal processing can be used to advantage with:
- A. SSB.
- B. SSTV.
- C. FSK.
- D. Any of the above.
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