电子电气员英语考试题库（浓缩300题）

电子电气员英语考试题库（浓缩300题）一、单选题1.Asilicon-controlledrectifier(SCR)consistsofafour-layersiliconwaferwithPNjunctions.A、oneB、twoC、threeD、Four答案：C解析：

SCR（silicon-controlledrectifier）可控硅，晶闸管2.Ancarrierisatankshipdesignedfortransportingliquefiednaturalgas.A、LNGB、OBOC、LPGD、SAR答案：A3.Whenthefirstclassorsecondclassradioelectroniccertificateholderisnotavailableonboard,isresponsibletomaintainandrepairallcommunicationequipment.A、theGOCoperatorsB、theETOC、thesecondofficerD、themaster答案：B解析：

《电子电气员英语》P252最后一段第三句4.Whichofthefollowingisnotthebasicpartofaprogrammablelogiccontroller?A、CPUB、inputmoduleC、powersupplymoduleD、Monitor答案：D5.concernshealthprotection,medicalcareoftheseafarers.A、SOLASB、MARPOLC、MLC2006D、STCW答案：C6.TheARPAstandsfor.A、AudioRadioPlottingAidsB、AutomaticRadarPlottingAidsC、AndRadarPeopleAidsD、AidsRadarPeopleAnd答案：B解析：

ARPA（AutomaticRadarPlottingAids）自动雷达标绘仪7.InautochiefC20,the______isusedontheship’smainenginetocontroltheengineRPM.A、EnginesafetyunitB、DigitalgovernorunitC、VesselmotinanalyzerD、Manoeuvringrecorder答案：B8.Astothefollowingpicture,whichofthefollowingstatementsiswrong?

A、ThisisaRadar,RadioDirectionAndRanging.B、It’susedindistress.C、Radarcanservenotonlyforpositionfixingbutalsoasananti-collisiondevice.D、Innavigation,itcanbeusedinallconditionsofvisibility,particularlyusefulinfogandduringnight.答案：B9.Astothefollowingpicture,whichofthefollowingstatementsisnottrue?

A、It’sanoilywaterseparator.B、It’sanimportantanti-pollutionequipmenttoensuretheprotectionofthemarineenvironment.C、It’sanoilseparator.D、Itmustbeabletodischargecleanwaterwithlessthan15ppmofoil.答案：C10.Thefollowingequipmentisusedforlifesaving.What’sitsname?

A、Asemi-closedlifeboat.B、Aenclosedlifeboat.C、Aopenlifeboat.D、Afreefalllifeboat.答案：B11.Thebasicelementspresentinthelooparea_____,acompactorandregulators,allofwhichsurroundtheprogresstheloop.A、DetectorB、RelayC、TransmitterD、Controller答案：D12.ThepropulsioncontrolwasdonebyspeedcontroloftheFPP,whichstandsforthe.A、FloatingPointPropellersB、FixedPitchProcessorsC、FloatingPointProcessorD、FixedPitchPropellers答案：D13.Thepropellermustrotateatrelativelylowspeed,sodieselenginescanbedirectlycoupledtothepropellershafting.A、mediumspeedB、highspeedC、lowspeedD、four-stroke答案：C解析：

《电子电气英语》P13低速柴油机曲轴可以直接连到螺旋桨轴，中高速柴油机不能直接相连，要使用减速齿轮箱14.Fixpartsofthedieselengineinclude___.A、bedplateB、pistonC、CrossheadD、connectingrod答案：A15.WhatdoesWWWstandfor？A、webwideworldB、wideworldwebC、worldwidewebD、worldwebwide答案：C16.whenstandinginashipandfactingthebow,therighthandsideiscalled___.A、bowB、starboardsideC、SternD、portside答案：B17.Theisanetworkofsatellitethatcontinuouslytransmitscodedinformation,whichmakesitpossibletopreciselyidentifylocationsonearthbymeasuringdistancefromthesatellites.A、IntegratedBridgeSystem(IBS)B、AutomaticIdentificationSystem(AIS)C、GlobalPositionSystem(GPS)D、ElectronicChartDisplayandInformationSystem(ECDIS)答案：C18.Inelectricalpowerinstallations,whatisnottheusageofprotectiondevicesandrelays？A、freefrominjuryfromfaultsB、protecthumanlifeC、preventimproperoperationD、reducedamageofequipment答案：D19.Whichstartingmethodinvolvesareductionofthestartingcurrent,andalsoareductionintheinrushtorque？A、ReducedvoltagestartingB、DirectonlinestartingC、Auto–transformerstartingD、softstarting答案：A20.Thehardwaredevice(suchasswitches,etc.)oftheautomaticpowerstationmustbeinspected,maintained,andtested_.A、dailyB、weeklyC、annuallyD、Periodically答案：D解析：

《电子电气员英语》P93倒数第二段开头21.AccordingtotheSTCWconvention,theETO’sresponsibilitiesonboardNOTinclude___.A、tobeondutyinengineroomB、tooperateandmaintainpowersysteminexcessof1000voltsC、tooperatecomputerandcomputernetworksD、tomonitortheoperationofelectrical,electronicandcontrolsystem答案：A22.Whentwodifferenttypesofnetworkconnectwitheachother,a____isindispensabletomakeit.A、RouterB、RepeaterC、TransceiverD、Switchboard答案：A23.Onboardships,agroundedfieldcoilinanACmotorcanbedeterminedbyusinga.A、portablegrowlerB、galvanometerC、visualinspectionD、megohmmeter答案：A解析：

growler（短路线圈测试仪）24.Rotorandstatorofthealternatorwerecleanedbyspecialcleaner,driedandpaintedwithonecoatof___paint.A、insulatingB、waterproofC、insulatedD、Dustproof答案：A25.Whichoneisthefunctionofsteeringgear.A、To–stopatanytimeasyourrequirementandholdonthecargoduringtheoperationB、TolifttheratedloadatratedspeedC、Tohandcargosensitivelyastheoperator’srequirementD、Tocontroltheshipcourse答案：D26.Inabipolartransistor,collectorcurrentiscontrolledbyasmallchangein___.A、basecurrentB、emittervoltageC、emittercurrentD、collectorvoltage答案：A27.Thefieldcoilsandthearmature.Thisisinfactthearrangementadoptedforlarge,heavydutyalternators.A、arestationary/rotatesB、arestationary/isstationaryC、rotate/isstationaryD、rotate/rotates答案：B解析：

大型交流同步发电机一般采取线圈旋转磁极式电机，线圈静止，旋转磁极，电枢（armature）属于定子也是静止的。28.Whenweusethermal–relaytorealizemotoroverloadprotection,itscurrentsettingis___.A、twotimesthanthevalueoftheratedcurrentB、twotimesthanthevalueofthestartingcurrentC、thevalueofthestartingcurrentD、thevalueoftheratedcurrent答案：D29.Thedevelopingtrendofmarinefirealarmsystemis______.A、RegionaltypesystemB、BuscontroltypesystemC、MicrocomputercontrolledsystemD、Relaysystem答案：B30.Ofthefollowingships,___carrystandardsizedcargotransportunitswhichcanprotectthecargoagainstbadweatherandtheft.A、cruisersB、bulkcarriersC、containershipsD、OBOS答案：C31.Whichisnotaliquidcargocarrierinthefollowingships？A、orecarrierB、LPGcarrierC、LNGcarrierD、chemicaltanker答案：A32.Correctsettingandverificationofsettingduringcommissioningandregularmaintenanceis___forsafeoperationsofvessel.A、needlessB、essentialC、helplessD、Useless答案：B33.Ifyouwanttoclosethewordwindow,youmayclickon“file”menu,andthenclickonthe___.A、sendB、exitC、closeD、Save答案：C34.ACC20usedof___installeddirectlyinthejunctionboxonthemaingengine.A、CentralizedprocessingunitB、MobileC、distributedD、Intergrated答案：C35.InGMDSS,theprocessingofaDistressprioritycallisautomatic.A、partlyB、completelyC、neverD、tosomeextent答案：B解析：

《电子电气员英语》P249第一段倒数第二句这样一个呼叫的处理程序是完全自动的，不需要人为干涉。36.Afiremaybelocatedby___devicesfittedinthevariousspaceinship.A、safetyB、fightingC、extinguishingD、Detection答案：D37.Thesteeringgearisnowmostwidelyappliedonoceangoingship.A、steamB、electricC、electro-hydraulicD、Hydraulic答案：D38.Thewheelhouseissituatedon_____A、AccommodationdeckB、BridgedeckC、CaptaindeckD、Boatdeck答案：B39.Lowvoltageswitchboardfeedsvarioussmallpowerconsumersexcept.A、compressorsB、pumpsC、mainenginesD、Ventilation答案：C40.ETOstandsfor.A、ElectronicTrainingOperatorB、ElectricTechnicalOperatorC、Electric/ElectronicTechnicalOperatorD、Electro-TechnicalOperator/Officer答案：D41.Whichstartingmethodcancausethehighelectro–dynamicalstressesonthemotorconnectioncableandviolentaccelerations？A、DirectonlinestartingB、RotorresistancestartingC、star–deltastartingD、softstarting答案：A42.Shippowersystemiscomposedofthe___A、Powersupply,voltageregulator,powergridB、Controlscreen,loadscreen,sub-panel,theemergencyswitchboardC、Powersupply,powerdistributionequipment,theloadD、Powersupply,load答案：C43.Whenthree–phasesynchronousgeneratorisno–loadrunning,thearmaturecurrent___.A、couldbearbitraryregulationB、isthebiggestC、ischangewithvoltageD、is0答案：D44.Thelowvoltagepowerstationisusedtosupplylowvoltagesourcetothefollowingexcept___.A、maingeneratorsB、TelephonesC、bellsD、Indicators答案：A45.Inordertomaintainthemechanicalstrengthofthemetal,___hastobeused.A、compressedairsystemB、BedplateC、theframesD、thecylinder答案：C46.Thesoftwaresystemcanbedividedinto.A、programanddataB、operatingsystemandlanguageprocessingsystemC、program,dataanddocumentD、systemsoftwareandapplicationsoftware答案：D47.TheMARPOLConventionisthemaininternationalconvention.A、aboutmarinepollutionpreventionB、coveringmarineprotectionoflifeC、aboutmarineD、aboutshipandportsecurity答案：A48.Motorsmay___whensubjectedtoprolongedundervoltageconditions.A、accelerateB、stallC、runupD、Reverse答案：B49.Microsoftofficeincludesthefollowingsoftwareexcept___.A、wordB、excelC、accessD、WPS答案：D50.___canworkastheplatformofbroadbandmultimediaaccessservice.A、InmarsatMB、InmarsatFC、InmarsatBD、InmarsatC答案：B51.Localareanetworkisanetworkthatconnects___.A、widegeographicalareaB、interphoneC、geographicallycloseresourcesD、mobilephone答案：C52.Allecho-sounderscanmeasurethe.A、averagedepthofwatertosoftbottomB、averagedepthfromwaterlinetohardbottomC、actualdepthofwaterbelowkeelD、actualdepthofwater答案：C解析：

《电子电气员英语》P236第一段第一句测深仪是一种可以用来测量富余水深（龙骨下净深）的装置53.Withtheadventof,ithasbecomepossibletobuildcompletelyelectronicfrequencychangers.A、mercuryarcrectifiersB、vacuumtubesC、electronicdevicesD、solidstateelectronics答案：C54.Inasquirrel–cagemotor,theinducedmagneticfieldmakesthemotorshaftrotate,thusconvertthe___.A、mechanicalenergyintothermalenergyB、mechanicalenergyintoelectricalenergyC、electricalenergyintomechanicalenergyD、electricalenergyintothermalenergy答案：C55.ForHVapparatusthekeyindicatortoitssafetyandgeneralconditionisits___.A、insulationresistanceB、loadconditionC、temperatureriseD、linecurrent答案：A56.Theterm'oil',asusedinthePollutionPreventionRegulations,means_.A、fueloilonlyB、crudeoilonlyC、liquefiedpetroleumgasD、petroleumoilofanykind答案：D57.Whichofthefollowingstatementsistrue？

A、Itsmainfunctionistocontroltheship’scourse.B、Itistheusualanchorhandlingdeviceandtheusualmooringequipment.C、Itisacranetoloadandunloadcargosfromtheship.D、Itisusedtocloseoffthehatchopeningandmakeitwatertight.答案：C58.Astothefollowingpicture,whichofthefollowingstatementsiswrong?

A、Agyrocompassisatypeofnon-magneticcompass.B、Itcanautomaticallyfindgeographicaldirection.C、Ithasmoreadvantagesovermagneticcompass.D、Agyrocompassiseasilyaffectedbyferromagneticmaterials,suchasship’ssteelhull.答案：D解析：

《电子电气员英语》P233第二小点陀螺罗经不受铁磁材料的影响（如钢质船体）59.Firedetectingsystemonmerchantvesselscannotsense___.A、smokeB、rateoftemperatureriseC、ionizedparticlesD、waterlevel答案：D60.Thewholeshiponcelostpower,afterthepowerrecoveredthemotorsinoperationbeforethebreakdownwouldstartinorderautomatically.Thisistheofautomaticpowerplant.A、sequentialstartB、preferencetripC、heavyloadenquiringD、previouslubricating答案：A61.TheabbreviationLANstandsfor.A、LocalAreaNetworkB、LogicalAreaNetworkC、LoadingAidsNetworkD、LogisticsAidsNetwork答案：A解析：

LAN（局域网）localareanetwork62.Thefunctionofaradar___isradiatingtheelectromageticwavesfrommagnetron,andreceivingtheechosignalsreflectedfromtheobjects.A、antennasystemB、transceiverC、displayD、powersupply答案：A63.WhatdoestheabbreviationVHFstandfor.A、Vessel'sHoistingFlagB、VeryHighSafetyC、Vessel'sHomingFrequencyD、VeryHighFrequency答案：D64.WhichofthefollowingequipmentdoesnotbelongtoGMDSS？A、INMARSAT–CB、DSCC、GPSD、EPIRB答案：C65.Themaingeneratorsareconnectedto_____A、MainswitchboardB、SectionboardsC、EmergencyswitchboardsD、Distributionboards答案：A66."offsets"aninherentcharacteristicof___controlmodes.A、resetB、proportionalC、towpositionD、rate答案：B67.Inthefirealarmsystems,thecommondetectingdevicesdon’tincludethe______A、ThermalsensorB、IonizationsensorC、InfraredsensorD、Levelsensor答案：D68.Ifthereissulfidationinthebatteryplatesofstoragebatteries,theincorrectoneofthefollowingdescriptionsis.A、thebatterycapacitywilldecreaseB、themaximumdischargecurrentwilldropC、overchargecanpreventandremovesulfidationD、theplatesmustbereplaced答案：B69.Agrowingnumberofvesselsnowcarryan,withpassengershipsandotherspecialistvesselscarryingtwoofmoresuchOfficers.A、ElectronicTechnicalOfficerB、ElectricalTechnicalOfficerC、Electro-TechnicalOfficerD、Electro-TechnicOfficer答案：C70.ProbablythemaindifferencebetweenaHVandanLVsystemoccursat.A、themainsupplycablesB、thetransformersC、theinsulationmaterialsD、theHVmainswitchboard答案：A71.possiblephaserelationshipsbetweenvoltageandcurrentinanalternatingcurrentcircuitincludewhichofthefollowingconditions？①currentandvoltagemaybeinphase②currentmayleadthevoltage③currentmaybelagthevoltageA、②③B、①②③C、②D、①③答案：B72.InAutoChiefC20,allsignalstoandfromtheenginearetransmittedon.A、RS-485busB、ProfiBusC、EthernetD、CANfieldbus答案：D73.Wecancalculatetheverticaldistancebetweenseasurfaceandtheseabedby.A、deductingtheship'sdraftfromtheUKCB、addingtheUKCandtheship'sdraftC、deductingtheUKCfromtheship'sdraftD、doublingtheUKC答案：B解析：

《电子电气员英语》P236第一段倒数第二句可知，海水表面和海底之间的垂直距离等于富余水深（UKC）和船舶吃水深度的和74.Whatdoesthisequipmentusedfor?

A、Itsmainfunctionistocontroltheship’scourse.B、Itistheusualanchorhandlingdeviceandtheusualmooringequipment.C、Itiscargohandlingdevicetoloadandunloadcargosfromtheship.D、Itisusedtocloseoffthehatchopeningandmakeitwatertight.答案：D75.UnderPortStateControl(PSC),inspectionofshipsinportwouldbetakenby.A、localgovernorB、PortStateControlOfficer(PSCO)C、IMOOfficerD、crewmembers答案：B76.Analarmsystemenablesthemonitoringofcertainmeasured.A、ConstantB、variableC、desiredvalueD、measuredvalue答案：D77.TheHVelectricalpermitrequirementsandproceduresaresimilartopermitsusedtocontrolaccessinanyhot-worksituationexcept.A、weldingB、cuttingC、burningD、Wiring答案：D78.Wecanuseaninvertertochangeinto.A、anACpowersource/aDConeB、alowvoltageACpowersource/ahighvoltageAConeC、aDCpowersource/anAConeD、aDCgenerator/anACone答案：C解析：

inverter（逆变器），rectifier（整流器）79.meansaplandevelopedtoensuretheapplicationofmeasuresonboardtheshipdesignedtoprotectpersonsonboard,cargo,cargotransportunits,ship’sstoresortheshipfromriskofasecurityincident.A、ShipSecurityPlanB、CompanysecurityplanC、PortfacilitysecurityplanD、Nationalsecurityplan答案：A80.PortStateControl(PSC)istheinspectionofforeignshipsintoverifythattheconditionoftheshipanditsequipmentcomplywiththerequirementsofandthattheshipismannedandoperatedincompliancewiththeserules.A、nationalports,internationalregulationsB、foreignports,internationalregulationsC、flagstate,IMOrequirementsD、theworld'soceans,IMOrequirements答案：A81.isinchargeofthemainengine.A、ThechiefengineerB、ThesecondengineerC、ThethirdengineerD、Thefourthengineer答案：B82.Forthoseequipmenttoberepairedorthoseunderrepairing,mustbehungontherelevantswitchtoensurethesafetyoftheoperator.A、anindicatinglightB、workingclothingC、ahardhatD、anotice答案：D解析：

notice（警示牌）83.Inadeckcrane,a___motorisusedforrotatingthecrane.A、liftingB、slewingC、luffingD、Hoisting答案：B84._____inchargeofthemainengine.A、ChiefengineerB、FourthengineerC、ThirdengineerD、Secondengineer答案：D85.Inatypicalnetworkconfiguration,theinternalnetworkisseparatedfromexternalnetworksby___.A、wwwserverB、anti–virussoftwareC、firewallgatewayD、Hub答案：D86.Itiscompulsoryforshipstobefittedwith___regardlessoftheseaareawhereitmaybein.A、MFB、HFC、EPIRBD、SES答案：C87.Theisadevicethatenablesthecomputertohandlesounds.A、networkcardB、videocardC、soundcardD、Monitor答案：C88.Ifthecoastguardwantstoknowyourship’spositiontoeffectsearchandrescue,whatequipmentcanbeofhelpful?A、INMARSATB、EPIRBsC、SARTsD、DSC(DigitalSelectiveCalling)答案：B89.Theexcitermustvarywith___inmaintainingthealternatorvoltage.A、loadcurrentonlyB、powerfactoronlyC、loadcurrentandthepowerfactorD、voltageandthespeedchangeoftheprimemover答案：C90.Theaccumulationofdirtonelectricalequipmentwillresultinthefollowingexcept___.A、overloadB、currentleakageC、earthfaultD、insulationbreakdown答案：A91.Whenthewireofmotorisconnectedtothemetallicframeandeasing,itwillrapidlydevelopinto___.A、ashort–circuitfaultB、anearthfaultC、aloss–of–loadfaultD、anoverloadfault答案：B92.Whenyouaremakingahighpotentialtestonapieceofrepairedelectricalmachinery,ariseinleakagecurrentindicate______A、GoodinsulationB、PoorinsulationC、HighslotdischargefactorD、Highinsulationpowerfactor答案：B93.A(n)outputprovidesaTTLlogichightwosecondpulsewhenaweatheralertisreceived.A、ALERTSTARTB、ALERTSTOPC、ALERTPAUSED、ALERTCANCEL答案：A解析：

《电子电气员英语》P272第三段第一句，当接收到气象警告时，报警启动输出产生一个持续两秒的TTL高电平脉冲94.Thereliabledatatransmissioninautochief-Ⅳremotecontrolsystemisguaranteedbydual___CANconnection.A、compulsoryB、compensatedC、enforcedD、Redundant答案：D95.Ofthefourevents,providesthefiringforce.A、suctionB、compressionC、expansionD、exhaust答案：C96.Theisolatingswitchcanensurethesafetyofhighvoltagemaintenanceandrepair,whichofthefollowingcircuitsneedn'tanisolatingswitch?A、circuitbetweenhighvoltagebusbarsandgeneratorbreakerB、circuitbetweenhighvoltagebusbarsandpowerdistributingbreakerC、circuitbetweenhighvoltagebusbarsandtransformerbreakerD、circuitbetweenlowvoltagebusbarsandpowerdistributingbreaker答案：D解析：

隔离开关一般用在高压系统97.Aradarsetproducesradiowaresandthengivesthemoutinthespacebymeansofits___.A、heightofwiresB、antennaC、highfrequencyD、radioX–ray答案：B98.Through___CESpersonalarenotifiedofthereceptionandpassingtroughofdistressprioritymessage.A、audio-visualalarmB、signalsC、VisualalarmD、audioalarm答案：A99.Whattypeofelectricmotorismostadoptedonboardinthemarineelectricdrivesystem___.A、asynchronouselectricmotorofwoundrotortypeB、asynchronouselectricmotorofsquirrelcagetypeC、directcurrentmotorD、synchronouselectricmotor答案：B100.Iftheengineisnotpreparedforstart,thestartwillbe____intheremotecontrolsystem.A、AllowedB、BlockedC、ManualD、Automatic答案：B101.Dieselenginecontrolcanbeobtainedbythebridge___.A、onlyaftertheengineroomcontrolstationisswitchedto“bridgecontrol”B、withtheapprovalofthechiefengineeronlyC、Atany-timeD、wheneversecondarystationisswitchedto"bridgecontrol".答案：A102.AccordingtoMaritimeLabourConvention,2006,themaximumhoursofworkshallnotexceed.A、10hoursinany24-hourperiodB、72hoursinanyseven-dayperiodC、12hoursinany24-hourperiodD、88hoursinanyseven-dayperiod答案：B解析：

《船舶管理》P46第二条第三小点最长工作时间一天24小时不得超过14h，7天之内不得超过72小时103.Topologydefinesthestructureofthenetwork,whichkindoftopologydoesthepictureindicate？

A、Theringtopology.B、Themeshtopology.C、Thehierarchicaltopology.D、Thestartopology.答案：B104.Thedisadvantagesoftheasynchronousmotorarethatitrequires___anditproducesalowstartingtorque.A、muchinitialcurrentB、littleinitialcurrentC、constantcurrentD、directcurrent答案：A105.Ageneratorispreventedfrombecomingmotorizedbyusing___.A、over–speedtripB、governorcontrolsC、reversepowerrelayD、backpressuretrip答案：C106.Intheelectricalpropulsionsystem,thevariablespeedelectricalmotorisnormallyusedforpropellersystem.A、fixedpitchB、variablepitchC、controlledpitchD、controllablepitch答案：C107.Analarmsystemshallbeprovidedindicatingany___requiringattention.A、OutofplaceB、suitableC、FaultD、Right答案：C108.TheabbreviationIBSmeans.A、integratedbridgesystemB、importantbridgesystemC、inputbridgesignalsD、inductivebridgesignals答案：A解析：

IBS（integratedbridgesystem）综合驾驶台系统109.Whatisrequiredforessentialservicesintheeventofthemaingeneratingsystemfailure?A、anemergencysupplyofdieselB、anemergencysupplyofelectricityC、anemergencysupplyoffreshwaterD、anemergencysupplyofcompressedair答案：B110.isusedtoalerttoshipsbytheshipsindistress.A、EPIRBB、SARTC、MESD、DSC答案：D111.UMSstandsforinthemaritimesubject.A、ultramuchspaceB、universalmediumsystemC、unitmachinedspaceD、unattendedmachineryspace答案：D解析：

UMS（UnattendedMachinerySpace）无人值班机舱112.ThepowerfactorofanACgeneratoroperatingsingularlyisdeterminedbythe.A、connectedloadB、primemoverspeedC、fieldexcitationD、generator'sratedvoltage答案：C113.Amotorhavingdoubleoperatingvoltagecouldbeusedinwindingswithonlysuppliedatthehighervoltage.A、delta-connectionB、star-connectionC、eitherdelta-connectionorstar-connectionD、neitherdelta-connectionnorstar-connection答案：B114.For___keyencryption,thereisapairofkeysforeachpartyapublickeyandaprivatekey.A、asymmetricB、passwordC、symmetricD、Inscriptional答案：A解析：对称加密算法在加密和解密时使用的是同一个秘钥；而非对称加密算法需要两个密钥来进行加密和解密，这两个密钥是公开密钥（publickey，简称公钥）和私有密钥（privatekey，简称私钥）。115.ThedatatravelsfromthetotheINMARSATNetworkCoordinationStation(NCS)andthendowntotheSES'sonshipsatsea.A、VHFB、SARTC、NAVTEXD、LES答案：D116.___Isnotapartofthemainswitchboardonboard.A、BusbarB、SynchronizingpanelC、LoadpanelofmaingeneratorD、Emergencyswitchpanel答案：D117.Thestar-deltastarterisaneffectivemethodofvoltagestartingofamotor.A、reducedB、increasedC、unchangedD、Eliminated答案：A118.Peaktopeakamplitudeisalsooccasionallyusedgivenasthepeakamplitude.A、twotimesB、threetimesC、fourtimesD、fivetimes答案：A119.BeforeworkisconnectedonHVequipmenta/an___mustbeissued.A、musterlistB、securityplanC、SSPD、Electricalpermittowork答案：D120.isthelevelforwhichfurtherspecificprotectivesecuritymeasuresshallbemaintainedforalimitedperiodoftimewhenasecurityincidentisimminent.A、Securitylevel1B、Securitylevel2C、Securitylevel3D、Securitylevel4答案：C解析：

《电子电气员英语》P300最后一段原句，是保安等级三的措施121.___isnotaconstituentpartofAUTOCHIEF–IVmainengineremotecontrolsystem.A、DigitalgoverningsystemDGU8800eB、AC–4bridgeunitC、AC–4enginecontrolroomunitD、HydraulicgovernorDGU8800e答案：D122.TheinputandoutputsignalsofMainEngineInterface(MEI)doNOTinclude.A、outputdigitalsignalsB、outputsignalsforsolenoidvalveactionC、potentiometeroutputD、outputanaloguesignals答案：D123.Theintegratedbridgesystempertainstoaspectsdealingwiththefunctionsexcept.A、navigationalmanagementB、alarmingC、weatherroutingD、conningdisplay答案：C124.Thefunctionofshortcutkey“control+C”is___.A、cutB、deleteC、pasteD、Copy答案：D125.Asthefollowingindicates:asemiconductorconsistsofaPNjunctionandhastwoterminals,namely,anodeandcathode.Itcanbeusedasa.

A、diode,rectifierB、thyristor,amplifierC、bipolarjunctiontransistor,rectifierD、triode,transformer答案：A126.OfthevariousHVbreakers,themostpopularandreliableare___.A、theoil–breakersB、thevacuumbreakersC、theairbreakersD、thegas–breakersusingSF6答案：B127.___isatypeofinternalcombustionenginewhichignitesthefuelbyinjectingitintohot,highpressureairinacombustionchamber.A、GasturbineB、DieselengineC、NuclearpowerplantD、steamengine答案：B128.Thedistancebetweenthebottomofhallandthewaterlineiscalled___.A、reservebuoyancyB、draftC、FreeboardD、Tonnage答案：B129.VDRisasystemdesignedfor___andhastobeincompliancewithIMO’sinternationconventionSOLASRequirements.A、passengershipB、cargoshipC、RO–ROshipD、allvessels答案：D130.Typically,firewallsareplacedontheentrypointtoa___networksuchastheInternet.A、publicB、privateC、nationalD、Local答案：A131.Whencurrentandvoltagereachmaximumvaluesatthesametime,thepowerfactoris.A、minimumB、maximumC、leadingD、Lagging答案：B132.The___isnotonthecontrolpaneloftheemergencygenerator.A、voltagetransformerB、reverse–powerrelayC、currenttransformerD、voltageregulationdevice答案：B133.Thefuelsupplysystemtoanautomaticauxiliaryboilerwillbeautomaticallyshutdown.Iftheboiler___.A、salinityisabnormallyhighB、steamdemandistoohighC、FeedwaterflowislowD、waterlevelistoolow答案：D134.Thenetworkequipmentsandcomponentsarephysicalentitiesconnectedtothenetwork.WhichofthefollowingisNOTanetworkequipmentorcomponent?A、repeaterB、routerC、operatingsystemD、Bridge答案：C135.Aclosed-loopcontrolsystemusesaoftheoutputandfeedbackofthissignaltocompareitwiththedesiredoutput.A、measureB、compartmentC、measurementD、Compare答案：A136.Web___isoneofmanysoftwareapplicationsthatfunctionastheinterfacebetweenauserandtheInternet.A、attributeB、titleC、displayD、Browser答案：D137.WhichofthefollowingisnotneededforaGPSreceivertocalculateposition？A、longitudeB、latitudeC、altitudeD、Attitude答案：D138.TheworkingprincipleofEPC-400watercontentsensoristhe_____withwatercontentchange.A、ResistancealternationB、InductancealternationC、TemperaturealternationD、capacitancealternation答案：D139.Startingmethodcandevelopahighstartingtorquewithreduceacceleradtiontime？A、D/YB、RotorresistancestartingC、softstartingD、Directonlinestarting答案：D140.Amarinedieselenginecanbedividedintotwoparts,themovingparts,orthedrivinggear,andthefixedparts.Whichofthefollowingdoesnotbelongtothemainfixedparts？A、crankshaftB、bedplateC、theframesD、thecylinder答案：A141.Mostradarsuse___frequencypowersupply.A、lowB、mediumC、veryhighD、High答案：B142.Intheeventofasmallbunkeroilspillondeckoccurringwhilebunkering,youshould.A、washdowntheareaimmediatelywithafirehoseB、washdowntheareawithkeroseneC、covertheareawithabsorbentmaterialD、covertheareawithfoam答案：C143.Bodyresistance___withincreasedvoltagelevelwhichenhancesthecurrentflow.A、increasesB、decreasesC、variesirregularvyD、remainsconstant答案：B144.AccordingtotheSTCWConventionManilaAmendment,theelectro-technicalofficerisatthe__.A、SupportlevelB、OperationallevelC、MaintenancelevelD、Managementlevel答案：B145.Astothefiredetectors,isthemostwidelyusedfiredetectoraboardandcandetect70%ofallfires.

A、AflammablegasdetectorB、AphotosensitivedetectorC、AthermaldetectorD、Asmokedetector答案：D146.isnotbelongtothefiremonitoringsystem.A、FailurealarmB、RecordofoperatingstatusandparametersC、DisplayofoperatingstatusandparametersD、Automaticrepair答案：D147.Intheelectricpropulsionsystem，wemustuseanelectricdrivingmotorof___.A、constantrevolutionspeedB、steadyrevolutionspeedC、controllablerevolutionspeedD、stabilizedrevolutionspeed答案：C148.AswitchboardforanACelectricalsystemrequirestheuseofwhichofthefollowingdevices?A、FrequencymeterB、OhmmeterC、Inductionvoltageregula