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Avionics Practice Test: Basics of Electronic Communication
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Electronic Communication topics include: Electronic communication types, electromagnetic spectrum, modulation and multiplexing.
 

Avionics Practice Test: Basics of Electronic Communication
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25 Questions

1. The range of electromagnetic signals encompassing all frequencies is referred to as?
2. Which organization regulates international EM spectrum division?
3. A device that can both transmit and receive is called as?
4. Which one of the following is not true with respect to amplitude modulation?
5. What type of communication is used in a commercial walkie talkie?
6. The information signal is otherwise referred to as ___________
7. The portion of the electromagnetic spectrum occupied by a signal is called ________
8. You have 5 information signals and only one transmitter. What technique will help in transmitting all the 5 signals?
9. Radio transmission is always the speed of light irrespective of the medium.
10. In what type of communication is time division multiplexing possible?
11. In frequency modulation, carrier frequency is always greater than baseband frequency.
12. Earth be considered as a communication medium.
13. What is the bandwidth of a signal having 928Mhz and 902Mhz as its upper and lower frequencies?
14. Which of the following is not an example of simplex communication?
15. Which one of the following is not a source of infrared radiation?
16. What are the factors that affect signal propagation speed assuming no noise?
17. Which one of the following is not a reason for not using X-rays in communication?
18. Who discovered the radio waves?
19. A signal travels a distance of 75 ft in the time it takes to complete 1 cycle. What is its frequency?
m 5 3.28 ft
20. What type of multiplexing is used in serial buses?
21. What is the component that converts an electrical signal into a signal suitable for transmission in a given medium called?
22. What type of communication is used between ATC and aircraft?
23. SHF Em waves are used in?
24. What type of multiplexing is used in mobile phones?
25. What is the upper frequency of a signal with a bandwidth of 6Mhz, if the lower frequency limit is 54Mhz?

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