Objective Questions on Introduction of Radar

Posted by

Objective Questions on Introduction of Radar

Objective Questions on Introduction of Radar, introduction to radar MCQ, radar MCQ questions and answers, objective type questions and answers of radar, radar objective questions, Engineering MCQ, Radar MCQ, Radar Engineering MCQ

Multiple Choice Questions of radar

  1. Increasing the pulse width in a pulse radar
  • increases resolution
  • decreases resolution
  • has no effect on resolution
  • increases the power gain

Answer: decreases resolution

2. A high noise figure in a receiver means

  • a poor minimum detectable signal
  • a good detectable signal
  • receiver bandwidth is reduced
  • high power loss

Answer: a poor minimum detectable signal

3. The sensitivity of a radar receiver is ultimately set by

  • a high S/N ratio
  • a lower limit of signal input
  • overall noise temperature
  • a higher figure of merit

Answer: overall noise temperature

4. A RADAR that is used for measuring the height of an aircraft is known as

  • radar altimeter
  • radar elevator
  • radar speedometer
  • radar altitude

Answer: radar altimeter

5. Second-time-around echoes are caused by

  • second-time reflection from target
  • echoes returning from targets beyond the cathode tube range
  • echoes that arrive after transmission of next pulse
  • extreme ends of bandwidth

Answer: echoes that arrive after transmission of next pulse

6. The resolution of pulsed radars can be improved by

  • increasing the pulse width
  • decreasing pulse width
  • increasing the pulse amplitude
  • decreasing the pulse repetition frequency

Answer: decreasing pulse width

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

  • 1/2 times
  • 2 times
  • 4 times
  • 8 times

Answer: 4 times

8. The term RADAR stands for

  • radio direction and reflection
  • radio detection and ranging
  • radio waves dispatching and receiving
  • random detection and re radiation

Answer: radio detection and ranging

The gain of a radar transmitting antenna is

  • less than that of a radar receiving antenna
  • almost equal to that of a radar receiving antenna
  • slightly higher than that of a radar receiving antenna
  • much higher than that of a radar receiving antenna

Answer: almost equal to that of a radar receiving antenna

A large antenna is used in radars, because it

  • gives higher gain
  • gives lesser side lobes
  • increases the beam width
  • increases bandwidth

Answer: gives higher gain

A radar cross-section is affected by

  • target size and shape
  • target aspect
  • target material and carrier frequency
  • all of the above

Answer: all of the above

A radar range equation provides a relationship among

  • received power
  • target characteristics
  • Rmax of the radar, which is determined
  • all of the above

Answer: all of the above

A radome is a

  • radar housed in a dome
  • protective cover for the antenna
  • dish-shaped antenna
  • dome-shaped antenna

Answer: protective cover for the antenna

The range of a radar can be increased by

  • increasing the peak transmitted pulse power
  • increasing the diameter of the antenna
  • increasing the frequency
  • any one of the above

Answer: any one of the above

In order to double the radar range, the peak pulse power should be increased

  • 2 times
  • 4 times
  • 8 times
  • 16 times

Answer: 16 times

Leave a Reply

Your email address will not be published. Required fields are marked *