Radar Engineering and Satellite Communication MCQs

Question 1

The term RADAR stands for

Accepted Answer

radio detection and ranging

Answer

radio direction and reflection

Answer

radiowaves despatching and receiving

Answer

random detection and reradiation

Question 2

The gain of a radar transmitting antenna is

Accepted Answer

much higher than that of radar receiving antenna

Answer

loss than that of radar receiving antenna

Answer

almost equal to that of radar receiving antenna

Answer

slightly higher than that of radar receiving antenna

Question 3

The duty cyclein a pulsed radar transmitter cannot be increased beyond a point because it

Accepted Answer

increases the average power of the transmitter tube

Answer

affects the operating frequency

Answer

does not detect weak IgrIals

Answer

none of the above

Question 4

In case the antenna diameter in a radar system is increased to four times, the maximum range will increase by

Accepted Answer

4 times

Answer

IF time

Answer

2 times

Answer

8 times

Question 5

Which one of the following applications or advantages of radar beacons is false?

Accepted Answer

more accurate tracking of enemy targets

Answer

navigation

Answer

target identification

Answer

very significant extension of the mximum range.

Question 6

`STALO' stands for

Accepted Answer

stabilized local oscillator

Answer

standard local oscillator

Answer

stable L-band output

Answer

staturated and linear oscillator

Question 7

Blind speed causes target to appear

Accepted Answer

stationary

Answer

moving uniformily

Answer

moving irregularly

Answer

intermittently

Question 8

For precise target location and tracking, retards operate in

Accepted Answer

S-band

Answer

D-band

Answer

L-band

Answer

none of the above

Question 9

The range of a radar is

Accepted Answer

directly proportional to the minimum detectable signal by the receiver

Answer

directly proportional to the gain of the radar antenna

Answer

inversely proportional to the gain of the radar antenna

Answer

inversely proportional to the transmitted power