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Introduction to Radar General Knowledge Quiz | Introduction to Radar General Knowledge Objective Type Questions & Answers

(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
Answer: insulator

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(23) Phased array radar is used for :
[A] fast scanning
[B] non-scanning only
[C] weather forecasting
[D] speed trapping
Answer: fast scanning
(24) Grating lobes are :
[A] desirable
[B] undesirable
[C] used in point communications
[D] used in weather forecast radars
Answer: undesirable
(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
Answer: height
(28) Cross-range has the units of :
[A] m
[B] m^2
[C] degree
[D] m/s
Answer: m
(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
Answer: 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
Answer: a unwanted echo
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
Answer: high
37 Ideal value of SNR in dB is :
[A] ∞
[B] zero
[C] – ∞
[D] 10
Answer: ∞
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
Answer: a switch
40 Kalman filter is :
[A] a low pass filter circuit
[B] a high pass filter circuit
[C] an algorithm
[D] a band filter circuit
Answer: an algorithm

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