Communication Systems MCQ Questions & Answers

1

Skip distance depends on time of day and angle of incidence.

A) True B) False

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Answer & Solution

Answer: Option A

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2

It is found that a ship to ship communication suffers from fading. This can be avoided by using

A) Space diversity B) Frequency diversity C) Broad band antenna D) Directional antenna

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Answer & Solution

Answer: Option B

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3

A buffer amplifier is

A) A double-tuned amplifier B) A high gain D.C. amplifier C) A cathode follower stage D) None of the above

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Answer & Solution

Answer: Option B

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4

SSB can be generated by

A) Filter method B) Phase cancellation method C) Good attenuation characteristics D) All of the above

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Answer & Solution

Answer: Option D

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5

What is the purpose of peak clipper circuits in radio transmitters?

A) To prevent overmodulation B) To reduce bandwidth C) To increase bandwidth D) To regulate oscillator I/P voltage

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Answer & Solution

Answer: Option A

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6

The direction of rotation of a CD is

A) Clockwise B) Anticlockwise C) Clockwise or anticlockwise depending on frequency of data stored D) Mostly anticlockwise but some times clockwise

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Answer & Solution

Answer: Option B

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7

A woofer should be fed from the input through a

A) Low pass filter B) High pass filter C) Band pass filter D) Band stop filter

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Answer & Solution

Answer: Option A

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8

The characteristic impedance of a twin wire feeder used for TV signals is about

A) 1000 ohm B) 500 ohm C) 300 ohm D) 100 ohm

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Answer & Solution

Answer: Option C

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9

In EM waves, polarization

A) Is always vertical in an isotropic medium B) Is caused by reflection C) Is due to transverse nature of waves D) Results from longitudinal nature of waves

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Answer & Solution

Answer: Option C

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10

The frequency range of 300 kHz to 3000 kHz is known as

A) Low frequency B) Medium frequency C) High frequency D) Very high frequency

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Answer & Solution

Answer: Option B

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Communication Systems MCQ Questions & Answers | ECE