Radar Engineering and Satellite Communication MCQs

Question 1

Higher pulse repetition frequency (P.R.F.) in a radar will

Accepted Answer

improve the signal-to-noise ratio of the system

Answer

increase the range of the radar

Answer

make week signal discernible

Answer

All of the above

Question 2

If PRF of a radar is 1200 and pulse width 1.2 pis, the duty cycle of the output tube is ts/s.

Accepted Answer

1440

Answer

1000

Answer

1201.2

Answer

1198.8

Question 3

The average power of a pulsed radar transmitter is given by

Accepted Answer

the product of peak power of the pulse and the duty cycle

Answer

peak power divided by the number of pulses repeated in one second

Answer

peak power divided by the duty cycle

Answer

All of the above

Question 4

The minimum range of detection by a pulse radar depends on

Accepted Answer

pulse width

Answer

average transmitter power

Answer

beamwidth of the antenna

Answer

All of the above

Question 5

A duplexer is a

Accepted Answer

transmit-receive switch

Answer

signal side band filter

Answer

balanced mixer

Answer

IF-log amplifier

Question 6

'LASER' is used in communication at

Accepted Answer

light frequencies

Answer

microwave frequencies

Answer

millimetre wave length

Answer

all the above

Question 7

A `radome' is a

Accepted Answer

protective cover for the antenna

Answer

radar housed in a dome

Answer

dome-shaped radar antenna

Answer

circular radar

Question 8

The sensitivity of a radar receiver is ultimately set by

Accepted Answer

overall noise temperature

Answer

high S/N ratio

Answer

lower limit of signal input

Answer

low ? rator

Question 9

A PPI displays

Accepted Answer

range versus angle

Answer

amplitude versus frequency

Answer

range and amplitude versus frequency

Answer

doppler frequency versus range