Below are the answers key for Multiple Choice Questions in Chapter 8: Radiation and Propagation of Waves from the book Electronic Communication Systems by George Kennedy. Make sure to familiarize each and every questions to increase the chance of passing the ECE Board Exam.
1. b. Fading
2. c. they are very reliable
3. d. 12 GHz
4. d. affected by the solar cycle
5. b. to prevent sky-wave and upper ray interference
6. c. frequency diversity
7. a. window
8. d. space waves
9. c. UHF
10. d. tilting
11. b. is due to the transverse nature of the waves
12. b. attenuation
13. a. their frequency
14. a. pass into a medium of different dielectric constant
15. d. may occur around the edge of a sharp obstacle
16. b. ducting
17. d. the Faraday effect
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