Communication Engineering MCQs with answers Page - 1

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A

Admin • 828.03K Points
Coach

Q. If the peak message signal amplitude is half the peak amplitude of the carrier signal, the signal is ______ modulated.

  • (A) 100%
  • (B) 2%
  • (C) 50%
  • (D) 70%

A

Admin • 828.03K Points
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Q. A percentage of modulation greater than

  • (A) 10%
  • (B) 25%
  • (C) 50%
  • (D) 100%

A

Admin • 828.03K Points
Coach

Q. Single sideband AM systems occupy same bandwidth as of conventional AM systems.

  • (A) true
  • (B) false
  • (C) ---
  • (D) ---

A

Admin • 828.03K Points
Coach

Q. How is the performance of SSB AM systems in fading channels?

  • (A) poor
  • (B) best
  • (C) good
  • (D) average

A

Admin • 828.03K Points
Coach

Q. Which of the following is a disadvantage of tone-in-band SSB system?

  • (A) high bandwidth
  • (B) bad adjacent channel protection
  • (C) effects of multipath
  • (D) generation and reception of signal is complicated

A

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Q. Circular polarization involves critical alignment between transmitting and receiving antenna.

  • (A) true
  • (B) false
  • (C) ---
  • (D) ---

A

Admin • 828.03K Points
Coach

Q. VSB modulation is used in televisions because it avoids phase distortion at low frequencies.

  • (A) true
  • (B) false
  • (C) ---
  • (D) ---

A

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Q. A duplex arrangement use separate frequencies for transmission

  • (A) true
  • (B) false
  • (C) ---
  • (D) ---

A

Admin • 828.03K Points
Coach

Q. Phase array radar can track many targets together.

  • (A) true
  • (B) false
  • (C) ---
  • (D) ---

A

Admin • 828.03K Points
Coach

Q. The upper and lower sideband frequencies for 5KHz amplitude modulation with a 30KHz carrier frequency will be?

  • (A) 35khz and 25khz
  • (B) 34khz and 24khz
  • (C) 25khz and 35khz
  • (D) 0.35khz and 0.25khz

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