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Free download in PDF Introduction to Radar General Knowledge Objective Type Questions & Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
(21)
‘SAR’ means :
[A]
system aperture radar
[B]
synthetic aperture radar
[C]
similar aperture radar
[D]
synchronizing aperture radar
Answer: similar aperture radar
(22)
Radome is made of :
[A]
insulator
[B]
conductor
[C]
magnetic material
[D]
semiconductor
(23)
Phased array radar is used for :
[A]
fast scanning
[B]
non-scanning only
[C]
weather forecasting
[D]
speed trapping
(24)
Grating lobes are :
[A]
desirable
[B]
undesirable
[C]
used in point communications
[D]
used in weather forecast radars
(25)
Correlation is :
[A]
the process of matching two waveforms
[B]
an algorithm
[C]
a matched filter
[D]
the process of integration
Answer: the process of matching two waveforms
(26)
MST radar is used for :
[A]
remote sensing
[B]
weather forecasting
[C]
fire controlling
[D]
speed trapping
Answer: weather forecasting
(27)
Radar altimeter is used for measurement of :
[A]
height
[B]
speed
[C]
range
[D]
bearing
(28)
Cross-range has the units of :
[A]
m
[B]
m^2
[C]
degree
[D]
m/s
(29)
Most of the weather radars use :
[A]
linear polarization
[B]
circular polarization
[C]
horizontal polarization
[D]
vertical polarization
Answer: circular polarization
(30)
Radar cross-section is expressed in :
[A]
m
[B]
m^2
[C]
m^3
[D]
watt/m^2
31
ECCM is :
[A]
Electronic Counter Counter Measure
[B]
Electronic Communication Counter Meter
[C]
Electrical Counter Communication Measure
[D]
Electrical Communication Critical Measure
Answer: Electronic Counter Counter Measure
32
Fourier transform is :
[A]
invented by Fourier
[B]
used to convert a frequency variable into time domain
[C]
not an operation
[D]
an operation containing integration
Answer: invented by Fourier
33
Pulse compression :
[A]
increases bandwidth
[B]
decreases bandwidth
[C]
increases range resolution
[D]
increases cross-range resolution
Answer: increases bandwidth
34
Clutter is :
[A]
a unwanted echo
[B]
a desired echo
[C]
a target
[D]
a radar beam
35
Matched filter is :
[A]
a low pass-filter
[B]
a high-pass filter
[C]
used to optimize SNR
[D]
used to reduce SNR
Answer: used to optimize SNR
36
The cross-section of chaff is :
[A]
small
[B]
high
[C]
zero
[D]
infinity
37
Ideal value of SNR in dB is :
[A]
∞
[B]
zero
[C]
– ∞
[D]
10
38
LIDAR means :
[A]
Linear Detection and Ranging
[B]
Light Detection and Ranging
[C]
Linear Detection Radar
[D]
Light Detection Radar
Answer: Light Detection and Ranging
39
Directional coupler is :
[A]
a switch
[B]
an amplifier
[C]
an oscillator
[D]
an active device
40
Kalman filter is :
[A]
a low pass filter circuit
[B]
a high pass filter circuit
[C]
an algorithm
[D]
a band filter circuit
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