雷达集训试题及答案英语.docxVIP

雷达集训试题及答案英语

一、单选题（每题2分，共20分）

1.WhichofthefollowingisNOTapartofradarsystem?

A.AntennaB.TransmitterC.ReceiverD.Television

【答案】D

【解析】Radarsystemconsistsofantenna,transmitter,andreceiver.Televisionisnotrelatedtoradarsystem.

2.Therangeofradarcanbeaffectedbywhichfactor?

A.FrequencyB.TemperatureC.AtmosphericpressureD.Alloftheabove

【答案】D

【解析】Rangeofradarisaffectedbyfrequency,temperature,andatmosphericpressure.

3.Whatdoesdopplereffectrefertoinradar?

A.RefractionofradiowavesB.ReflectionofradiowavesC.ChangeinfrequencyduetorelativemotionD.Absorptionofradiowaves

【答案】C

【解析】Dopplereffectreferstothechangeinfrequencyduetorelativemotionbetweenradarandtarget.

4.Whatisthepurposeofusinghighfrequencyinradar?

A.ToincreaserangeB.TodecreaserangeC.ToimproveaccuracyD.Toreducepowerconsumption

【答案】A

【解析】Highfrequencyradiowavescanincreasetherangeofradar.

5.WhichofthefollowingisNOTatypeofradarsystem?

A.AirborneradarB.Ground-basedradarC.SpaceborneradarD.Opticalradar

【答案】D

【解析】Radarsystemsincludeairborne,ground-based,andspaceborneradars.Opticalradarisnotatypeofradarsystem.

6.Whatisthefunctionoftheantennainradar?

A.TotransmitandreceiveradiowavesB.ToamplifyradiowavesC.ToconvertradiowavestoelectricalsignalsD.Todisplayradarimages

【答案】A

【解析】Antennainradarsystemisusedtotransmitandreceiveradiowaves.

7.Whatisthepurposeofusingpulseradar?

A.ToimproveresolutionB.ToincreaserangeC.ToreduceinterferenceD.Alloftheabove

【答案】D

【解析】Pulseradarcanimproveresolution,increaserange,andreduceinterference.

8.Whatistheunitofradarrange?

A.MeterB.SecondC.KilometerD.Hertz

【答案】C

【解析】Radarrangeisusuallymeasuredinkilometers.

9.Whatisthepurposeofusingclutterfilteringinradar?

A.ToreducenoiseB.ToimproveresolutionC.TodetecttargetsD.Toincreaserange

【答案】A

【解析】Clutterfilteringisusedtoreducenoiseinradarsignals.

10.Whatisthefunctionofthereceiverinradar?

A.ToamplifyradiowavesB.ToconvertradiowavestoelectricalsignalsC.TodisplayradarimagesD.Totransmitradiowaves

【答案】B

【解析】Receiverinradarsystemisusedtoconvertradiowavestoelectricalsignals.

二、多选题（每