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MCQs

Total Questions : 100 | Page 3 of 10 pages
Question 21. Padders are used in a receiver to
  1.    discard the carrier
  2.    facilitate tracking
  3.    filter the input signal
  4.    suppress noise
 Discuss Question
Answer: Option B. -> facilitate tracking
Answer: (b).facilitate tracking
Question 22. Which of the following oscillator is generally not used at VHF?
  1.    Colpitts oscillator
  2.    Clapp oscillator
  3.    Armstrong oscillator
  4.    Ultra Audio oscillator
 Discuss Question
Answer: Option C. -> Armstrong oscillator
Answer: (c).Armstrong oscillator
Question 23. The selectivity of most receivers is determined largely by
  1.    sensitivity
  2.    characteristics of IF section
  3.    antenna direction
  4.    all of the above
 Discuss Question
Answer: Option B. -> characteristics of IF section
Answer: (b).characteristics of IF section
Question 24. In a radio receiver, the local oscillator is tuned to a frequency
  1.    lower than the incoming frequency
  2.    higher than the incoming frequency
  3.    equal to incoming frequency
  4.    any of the above
 Discuss Question
Answer: Option B. -> higher than the incoming frequency
Answer: (b).higher than the incoming frequency
Question 25. In a superheterodyne receiver, the IF is 455 kHz. If it is tuned to 1200 kHz, the image frequency will be
  1.    1655 kHz
  2.    2110 kHz
  3.    745 kHz
  4.    910 kHz
 Discuss Question
Answer: Option B. -> 2110 kHz
Answer: (b).2110 kHz
Question 26. The sensitivity curve of a standard receiver is represented byThe Sensitivity Curve Of A Standard Receiver Is Represented ...
  1.    curve A
  2.    curve B
  3.    curve C
  4.    curve D
 Discuss Question
Answer: Option C. -> curve C
Answer: (c).curve C
Question 27. When fs is the signal frequency and fi is the intermediate frequency, then image frequency fsi is given byWhen Fs Is The Signal Frequency And Fi Is The Intermediate F...
  1.    A
  2.    B
  3.    C
  4.    D
 Discuss Question
Answer: Option B. -> B
Answer: (b).B
Question 28. Transport lag usually exists inTransport Lag Usually Exists In
  1.    thermal systems
  2.    hydraulic systems and thermal systems
  3.    pneumatic systems
  4.    thermal, hydraulic and pneumatic systems
 Discuss Question
Answer: Option D. -> thermal, hydraulic and pneumatic systems
Answer: (d).thermal, hydraulic and pneumatic systems
Question 29. The selectivity curve of a standard receiver is represented byThe Selectivity Curve Of A Standard Receiver Is Represented ...
  1.    curve A
  2.    curve B
  3.    curve C
  4.    curve D
 Discuss Question
Answer: Option C. -> curve C
Answer: (c).curve C
Question 30. Which curve represents the fidelity curve of a standard receiver?Which Curve Represents The Fidelity Curve Of A Standard Rece...
  1.    Curve A
  2.    Curve B
  3.    Curve C
  4.    Curve D
 Discuss Question
Answer: Option C. -> Curve C
Answer: (c).Curve C

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