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Radar Question & Answers

December 1, 2022 By WatElectronics

This article lists 100 Radar MCQs for engineering students. All the Radar Questions & Answers given below include a hint and a link wherever possible to the relevant topic. This is helpful for users who are preparing for their exams, interviews, or professionals who would like to brush up on the fundamentals of Radar.

A system that is meant for detection by using radio waves to determine the angle, object radial velocities, and its angle and are related to sites is referred to as Radar.  These are installed and are used for detecting spacecraft, ships, aircraft, motor vehicles, weather formation, terrain, and guided missiles.

Radar systems consist of the transmitter to produce EM waves in microwaves or radio domains, an antenna to transmit, an antenna to receive, and also the receiver. It also consists of a processor that is capable of determining objects' properties. Radio signals generated either continuously or pulsed from the transmitter get reflected from objects and are returned to a receiver.

The Signal returned to the receiver contains information about the object's speed and location. Initially, the Radars are developed for military use during the second world war. Later developments in the Radar made it accessible for diverse applications including air, anti-missile system, landmarks located using marine radar, and so on.

High-tech systems of radar are associated with the processing of digital signals, machine learning, and extracting information from high-level noise. A different system that is much similar to Radar uses other partitions of the EM spectrum. For example, Lidar uses IR lights from LASER instead waves of radio. Unwanted incidents in vehicles without drivers are prevented because radar assists the platform i.e., automated, and the environment of that particular vehicle is monitored.

1). RADAR is an ________________ sensor?

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2). What are the operations performed using Radars?

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3). Echoes are observed from ____________ in Radars?

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4). How Radar is different from IR & optical devices of sense?

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5). _______________ can determine targets shape & size as well?

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6). Radars are ____________ devices?

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7). In what region of the EM spectrum, Radars are operated?

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8). Radars are used for _____________ frequencies?

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9). The components in circuit & hardware of radars are varied with ____________?

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10). Radars range is dependent on ______________?

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11). ___________ is detected because of noise at the input of the receiver?

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12). What should be placed at the initial receiver’s stage?

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13). _____________ in radars enhances signals desired?

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14). RADAR is _________?

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15). Distance amid target and radar is referred to as _________?

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16). Time intervals between successive pulses of the clock are referred to as __________?

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17). What frequency determines the signal transmitted by the Radar?

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18). Maximum Unambiguous Range is to detect ____________?

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19). What happens if the signal transmitter has lesser power?

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20). Echo signal containing the minimum value of power, then signals detected using radars are referred to as ___________?

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21). Target is detected from the threshold value of the signal received is known as ____________?

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22). What should be the value of the threshold if radar contains high detected signal strength?

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23). If the signals point is greater the value of the threshold is referred to as _________?

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24). If the signals point is lesser the value of the threshold is referred to as _________?

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25). Unwanted component in the signal received at the Radars receiver is ________?

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Radar MCQs for Exams

26). Thermal motion due to electrons conduction in radars leads to ____________?

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27). Radar uses ____________ principle?

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28). What waves does radar use?

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29). Targets that are not visible to radars at a certain speed are referred to as ____________?

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30). Based on signals type, Radars are classified as _________________?

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31). Pulse signal used to operate the Radar is referred to as __________?

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32). How many types does a pulse radar have?

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33). Stationary targets are detectable using ____________?

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34). Basic pulse radar use ______ antenna?

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35). For each clock signals antenna in basic pulse radar transmits ___________?

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36). What is utilized to detect targets that are non-stationary?

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37). What principle is used in MTI Radar?

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38). Continuous wave radars use ______?

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39). Continuous wave radars are classified as?

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40). Which is known as CW Doppler Radar?

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41). How many antennas are used in unmodulated CW radars?

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42). What is measured using unmodulated CW radars?

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43). Which radars use frequency modulation?

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44). What is measured using Frequency Modulated CW radars?

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45). What is the purpose of pulse modulators in pulse Radar?

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46). What transmit pulses that are repetitive in pulse radar?

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47). What connects the antenna to the transmitter in pulse radar?

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48). _______ amplifies received Rf signals that are weak in the pulse Radar?

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49). What improves SNR at pulse radars output?

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50). What demodulates the outcome obtained from If amplifiers in pulse radar?

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Radar MCQs for Students

51). What happens if the target is non-stationary in radar?

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52). Received signals frequency _____ if the target tends to move in radars direction?

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53). How many mixers are present in CW radars?

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54). Analog signals with f0 as frequency in CW radars are produced using _________?

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55). What produces the signal with frequency f1 in continuous radar?

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56). What are the output frequencies produced by mixer 1 in CW radars?

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57). What are the outcome frequencies obtained from Mixer2?

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58). Which frequencies are amplified by the If amplifier in CW radar?

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59). What detects the signals with doppler frequencies?

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60). What amplifies the signals containing doppler frequencies?

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61). What is the purpose of an indicator in CW radar?

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62). Information of target in CW radars is indicated using _______?

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63). Echo signal in FMCW radar is received by _________?

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64). What is the purpose of a local oscillator in FMCW radar?

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65). What are the frequencies produced by FMCW radars mixer 1?

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66). What produces a lower frequency of sideband in FMCW radar?

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67). What are the frequencies produced by mixer 2?

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68). What is the signal frequency obtained from FMCW radar?

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69). What amplifies the outcome from the balance detector to desired levels in FMCW radar?

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70). In FMCW radar outcome of low-frequency amplifiers is fed to ________?

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71). Doppler velocity in FMCW radars is obtained from __________?

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72). Average counter of frequency calculates _____ in FMCW radar?

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73). MTI radars must receive an echo signal from _____?

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74). Echo signals received from Stationary objects are referred to as _________?

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75). Based on the types of transmitters MTI radars are classified as ________?

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Radar MCQs for Interviews

76). MTI radar is based on a power amplifier as the transmitter use ______ antenna?

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77). Pulse modulated signal from the pulse modulator is injected to __________?

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78). What amplify levels of power in pulse signals?

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79). What type of radars are preferred if velocities of information are a priority?

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80). Local oscillators outcome is applied to_______ in FMCW Radar?

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81). What produces signals with the intermediate frequencies in FMCW Radar?

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82). What is the outcome signals frequency obtained from mixer1 in FMCW Radar?

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83). Aircraft during rain is detected using _____________ in Radars?

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84). What are the various Radar applications?

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85). Blind speed of Radars is dependent on ____________of waves?

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86). What type of radars are capable of eliminating clutters?

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87). What changes the microwave signals of echo into electrical in radars?

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88). Which sensors in radar are used in measuring objects' distance?

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89). _______________ are the radar types?

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90). What transmits higher repletion frequencies of pulses?

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91). What transmits lower repetition frequencies of pulses?

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92). What is the oscillator present in MTI Radar?

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93). Circular or horizontal polarizations are used in _____________ radars?

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94). What is the information obtained from Instrumentation Radars?

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95). Which radar is categorized similarly to Bistatic Radar?

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96). Conical Scanning Radar is _________?

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97). A receiver & transmitter located at the same position in ________ radar?

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98). If the Bistatic angle is equivalent to zero then it is __________ radar?

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99). Bistatic angle of radar is small then it is ____________ radar?

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100). Bistatic angle of the system is almost equivalent to 180 then it is _________ radar?

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