三副航海英语习题讲解3.doc

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1、2017航海英语复习三Keyword10:RadarandARPA（60）A335.Radarmakesitpossibleandmuchsaferforustosail__.A.indensefogB.inboisterousweatherC.intheopenseaD.inrivers【知识点】雷达的使用【解析】主要作用：雾航B380.Radarmakesthemostaccuratedeterminationofthe__.A.directionofatargetB.distancetoatargetC.sizeofatargetD.shapeofat

2、arget【知识点】雷达的使用【解析】雷达测距最准确。相关题目A382.Withoutdoubttheradarisahighlyimportantnavigationaid.Butdutyofficershallawarethat__whenusingit.A.ItsrangereadingismoreaccuratethanitsbearingreadingB.Alow-lyingcoastlinewithalong,flatbeachwillshowupproperlyontheradar.C.Radarisonlyaimedatcollisionav

3、oidance.D.theuseofradarisnecessaryonlywhenvisibilityisrestricted、D527.Radarisnotonlytoobtain______,butalsotomeasuretheirdistanceawayfromyou.A.brightnessofobjectsB.coloroftargetsC.shapeoftargetsD.bearingofobjectsD361.WhichstatementconcerningtheoperationofradarinfogisTURE?A.radarrang

4、esarelessaccurateinfogB.navigationbuoyswillalwaysshowuponradarC.asandybeachwillshowupcleareronradarthanarockycliffD.smallwoodenboatsmaynotshowuponradarB327.Thecorrectmethodofswitchingoffamarineradaristoturnpowerswitchto____positionfirst,thento______position.A.off/standbyB.standby/o

5、ffC.standby/closeD.close/standby【知识点】雷达的使用【解析】雷达关机步骤。B606、Astheradarantennascansthrough____arotation,itcanbeshowwherethetargetisrelativetoyourposition.A.60degreeB.360degreeC.180degreeD.90degree【知识点】雷达的使用【解析】雷达天线。A345.Theradarcontrolthatreducesweakechoesouttoalimiteddistancefromthes

6、hipisthe__A.sensitivitytimecontrol(sea-cluttercontrol)B.receivergaincontrolC.brilliancecontrolD.fasttimeconstant(differentiator)【知识点】雷达的使用（控钮）【解析】近距离的杂波相关题目D346.Theradarcontrolthatshortensallechoesonthedisplayandreducescluttercausedbyrainorsnowisthe______.A.sensitivitytimecontrol(s

7、eacluttercontrol)B.receivergaincontrolC.brilliancecontrolD.fasttimeconstant(differentiator)D372.______isonthepanelofradar.A.KEYLOCKB.REPEATERC.STATICINVERTERD.ANTI-CLUTTER-SEAA391.WhatisthepurposeofVRMcontrol?A.TomeasuredistanceaccuratelyB.TomeasurebearingaccuratelyC.Tomeasurerange

8、andbearingD.Toadjustradarm