Advance Communication System MCQ Questions and Answers
1. For long distance communication via satellite the frequency ranges from
Answer : A
2. The instrument used for measurement of height for an aircraft is
Answer : A
3. The range of mobile telephone is about :
Answer : A
4. RADAR consist of :
Answer : D
5. Radio waves have _____ frequency than microwave.
Answer : A
Advance Communication System MCQ
6. Ducting is caused due to _____ in version.
Answer : C
7. What is the number of satellite required for global communication ?
Answer : C
8. Higher the frequency :
Answer : C
9. Synchronous satellite orbits the earth once in :
Answer : C
10. An electronic calculator uses :
Answer : C
Advance Communication System MCQ
11. Geostationary satellites follow :
Answer : B
12. A duplexer is a :
Answer : B
13. In an AM wave, Amin=40V, Amax=60V, then modulation index is :
Answer : B
Explaination : Modulation index = (Amax-Amin)/(Amax+Amin)
14. PRF stands for :
Answer : C
15. If Em=peak value of information signal, Ec=peak value of carrier signal, then modulation index(m) is given by :
Answer : D
Advance Communication System MCQ
16. Sky waves are _____
Answer : C
17. Space waves are :
Answer : B
18. FM broadcast lies in _____
Answer : A
19. The maximum usable frequency and critical frequency are related as :
Answer : B
20. The height of troposphere from the ground is nearly :
Answer : C
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