Satellite Communication MCQ Questions & Answers

1

PPI scan type radar display can

A) indicate only the target bearing B) indicate only the target range C) indicate both the target range as well as direction D) be used to produce target image

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Answer & Solution

Answer: Option C

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2

A radar system that can determine both target range as well as target velocity is

A) Pulsed radar B) Doppler radar C) CW radar D) MTI

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Answer & Solution

Answer: Option A

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3

The orbital satellites are

A) symmetrical B) asymmetrical C) synchronous D) non synchronous

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Answer & Solution

Answer: Option D

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4

The orbital period of a satellite in a circular orbit of 500 km above the Earth's surface, taking mean radius of the Earth as 6400 km and Kepler's constant µ as 4 × 10⁵ km³/s² nearly

A) 1.6 hours B) 2.4 hours C) 3.2 hours D) 6.4 hours

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Answer & Solution

Answer: Option A

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5

An automotive radar operates at a frequency of 8 GHz. The Doppler shift due to an automobile directly approaching the radar at a speed of 160 km per hour is

A) 2.37 kHz B) 23.7 kHz C) 8 kHz D) 8 GHz

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Answer & Solution

Answer: Option A

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6

The output stage of a transponder on board a satellite has a maximum power output of 10 watts. However, it is not operated at the maximum power output in order to

A) Conserve the available limited battery power B) Reduce noise due to device C) Avoid intermodulation distortion D) Avoid heating gap of the satellite beyond a per set value

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Answer & Solution

Answer: Option A

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7

The maximum unambiguous range of pulsed radar depends upon

A) Peak power of the transmitted pulses B) Transmitted pulse widths C) Signal to noise ratio of the radar receiver D) Pulse repetition rate of the transmitted signal

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Answer & Solution

Answer: Option B

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8

Linear velocity of a satellite in a circular orbit is

A) Independent of its mass B) Directly proportional to its mass C) Directly proportional to square of its mass D) Directly proportional to square root of its mass

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Answer & Solution

Answer: Option A

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9

The mean sun does at a uniform speed but otherwise requires the same time as the real sun to complete one orbit of the earth, this time being

A) the tropical year B) the leap year C) the Julian calendar year D) the Grgorian calendar year

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Answer & Solution

Answer: Option A

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10

In a pulsed radar, the peak radar transmitter power is increased by a factor of 81 keeping all other radar parameters unchanged. The maximum range capability of the radar increases by a factor of

A) 81 B) 9 C) 27 D) 3

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Answer & Solution

Answer: Option D

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Satellite Communication MCQ Questions & Answers | ECE