Satellite Communication MCQ Questions & Answers

71

Wide-banding technique is employed in the

A) Video amplifier of a TV receiver B) IF amplifier of an FM receivers C) RF amplifier of an am receiver D) Input section of a communication receiver

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Answer & Solution

Answer: Option D

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72

Which of the following can be used to improve range resolution in a Radar?

A) Short duration pulse B) Long duration pulse C) High frequency of operating signal D) Increasing pulse width

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Answer & Solution

Answer: Option A

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73

If 'r' is the radius of circular orbit then the orbital period of a satellite is directly proportional to:

A) $${{\text{r}}^{\frac{3}{2}}}$$ B) $${{\text{r}}^{\frac{1}{3}}}$$ C) $${{\text{r}}^{\frac{1}{2}}}$$ D) $${{\text{r}}^{\frac{2}{3}}}$$

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Answer & Solution

Answer: Option A

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74

What is the maximum signal propagation time for a geosynchronous satellite transmission system?

A) 140 ms B) 220 ms C) 280 ms D) 560 ms

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Answer & Solution

Answer: Option C

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75

Blind speed problem can be overcome by

A) Changing Doppler frequency B) MTI C) Monopoles D) Varying PRF

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Answer & Solution

Answer: Option D

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76

Basic transmission loss in decibels for a synchronous satellite signal for uplink frequency of 6 GHz would be

A) 184 B) 200 C) 92 D) 60

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Answer & Solution

Answer: Option B

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77

In Satellite communication, a repeater is placed between

A) many transmitting stations and many receiving station B) many transmitting stations and one receiving station C) one transmitting station and many receiving station D) one transmitting station and one receiving station

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Answer & Solution

Answer: Option A

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78

Relationship between Doppler frequency shifts of two radars A and B having 0.1 foot and 0.05 foot wave-lengths, approaching the target at 1000 feet per second and 2000 feet per second rate, respectively, will be

A) Doppler frequency shift of radar A will be one-fourth of Doppler frequency shift of radar B B) Doppler frequency shift of radar A will be one-half of Doppler frequency shift of radar B C) Doppler frequency shift of radar A will be double of Doppler frequency shift of radar B D) Doppler frequency shifts of radar A and radar B will be same

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Answer & Solution

Answer: Option A

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79

In CW radar, which tracking technique is used as primary means of resolving targets?

A) Doppler tracking B) Range tracking C) Angle tracking D) Line tracking

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Answer & Solution

Answer: Option A

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80

An advantage of passive satellites is that they do not require sophisticated electronic equipment on board, although they are not necessary void of power. Some passive satellites require which one of the following for tracking and ranging purposes?

A) Radio beacon transmitter B) Defense launched courier C) Radio beacon receiver D) Satellite beacon launcher

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Answer & Solution

Answer: Option A

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Satellite Communication MCQ Questions & Answers | ECE