Radar Engineering and Satellite Communication MCQs

Question 1

'Second time around' echoes are caused by

Accepted Answer

echoes that arrive after transmission of the next pulse

Answer

second time reflection from target

Answer

echoes returring from targets beyond the cathode ray tube range

Answer

None of the above

Question 2

A simple CW radar does not give range information because

Accepted Answer

continuous echo cannot be associated with any specific part of the transmitted wave

Answer

it uses the principle of Doppler shift

Answer

CW waves do not reflect from a target

Answer

None of the above

Question 3

The best system for tracking a target after it has been acquired is

Accepted Answer

monopulse

Answer

helical

Answer

nodding

Answer

conical

Question 4

'PPP in a radar system stands for

Accepted Answer

plan position indicator

Answer

plan position image

Answer

pulse position indicator

Answer

none of the above

Question 5

In radar reception, the term ratrace' is used in connected with

Accepted Answer

duplexer

Answer

modulator

Answer

pulse characteristics

Answer

receiver bandwidth

Question 6

The A-scope of a radar displays

Accepted Answer

traget range but not position

Answer

no 'grass'

Answer

traget position and range

Answer

target position but not range

Question 7

A bistatic radar has

Accepted Answer

transmitting and receiving antennas separated by quite large distances

Answer

transmitting and receiving antennas at the same point

Answer

two static antennas

Answer

two static displays

Question 8

The duty oycle in a pulses radar transmitter cannot be increased beyond a point because it

Accepted Answer

increase the average power of the transmitter tube

Answer

affects the operating frequency

Answer

does not detect peak signals

Answer

None of the above

Question 9

One method of solving 'blind speed' problem is to

Accepted Answer

use a variable PRF

Answer

use digital MTI

Answer

change Doppler frequency

Answer

use short wavelength