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MCQs

Total Questions : 70 | Page 3 of 7 pages
Question 21. FDM is associated with ________________
  1.    FM/FM modulation
  2.    PDM/FM modulation
  3.    Both FM/FM and PDM/FM modulation
  4.    None of the mentioned
 Discuss Question
Answer: Option A. -> FM/FM modulation
Answer: (a).FM/FM modulation
Question 22. Upper frequency limit of FDM is constant.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 23. FM/FM telemetry is a/an _________
  1.    Analog telemetry system
  2.    Digital telemetry system
  3.    Analog or digital depending on design
  4.    None of the mentioned
 Discuss Question
Answer: Option A. -> Analog telemetry system
Answer: (a).Analog telemetry system
Question 24. In FDM, carrier signal have ______________
  1.    Low frequency
  2.    Very high frequency
  3.    Multiplexing is not possible
  4.    None of the mentioned
 Discuss Question
Answer: Option B. -> Very high frequency
Answer: (b).Very high frequency
Question 25. Baseband frequency of FDM will be ________________
  1.    Less than 70 Hz
  2.    Less than 70 KHz
  3.    Less than 70 MHz
  4.    Less than 70 GHz
 Discuss Question
Answer: Option B. -> Less than 70 KHz
Answer: (b).Less than 70 KHz
Question 26. Piezo electric crystals are low impedance sources.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 27. Modulation is used for __________________
  1.    Reducing loss in transmission
  2.    Amplification of signal
  3.    Conversion of signal
  4.    None of the mentioned
 Discuss Question
Answer: Option A. -> Reducing loss in transmission
Answer: (a).Reducing loss in transmission
Question 28. In line code transmission, signal is represented by ______________
  1.    Impulses
  2.    Train of pulses
  3.    DC signal
  4.    Continuously varying signal
 Discuss Question
Answer: Option B. -> Train of pulses
Answer: (b).Train of pulses
Question 29. Which of the following process is explained as detection?
  1.    Modulation
  2.    Demodulation
  3.    Amplification
  4.    None of the mentioned
 Discuss Question
Answer: Option B. -> Demodulation
Answer: (b).Demodulation
Question 30. Which of the following is represented as digital transmission?
  1.    Baseband bit stream transfer
  2.    Passband bit stream transfer
  3.    All of the mentioned
  4.    None of the mentioned
 Discuss Question
Answer: Option C. -> All of the mentioned
Answer: (c).All of the mentioned

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