2026年全国海船船员考试（轮机部（电子电气员英语7001））考前冲刺试题及答案

2026年全国海船船员考试（轮机部（电子电气员英语7001））考前冲刺试题及答案一、单项选择题（每题1分，共80分）1.Whichunitisusedtomeasureelectricalcurrent?A.VoltB.OhmC.AmpereD.Watt2.Themainswitchboardisusedto___electricalpowertovariousconsumers.A.generateB.distributeC.convertD.discard3.Whatisthefunctionofacircuitbreaker?A.TostoreelectricalenergyB.ToraisethevoltageC.TochangeDCintoACD.Toprotectthecircuitfromovercurrentandshortcircuit4.Theemergencygeneratorstarts___whenthemainpowersupplyfails.A.automaticallyB.manuallyC.remotelyD.periodically5.Inmarinepractice,a___isusedtomeasuretheinsulationresistanceofacable.A.meggerB.ammeterC.voltmeterD.wattmeter6.Thebusbarsinamainswitchboardareusuallymadeof___.A.aluminiumB.copperC.steelD.lead7.Whenparallelingtwogenerators,the___mustbecheckedbeforeclosingthebus-tiebreaker.A.phasesequenceB.oilpressureC.watertemperatureD.airpressure8.Ashoreconnectionboxisprovidedtotakepowerfrom___.A.theemergencygeneratorB.shoresupplyC.themaingeneratorD.thebattery9.The___providesalow-voltagesupplyforindicationlampsandcontrolcircuits.A.currenttransformerB.controltransformerC.powertransformerD.auto-transformer10.Ifthemonitoredparameterexceedsthepresetvalue,the___willactivateanaudibleandvisualalarm.A.alarmsystemB.fuelsystemC.startingsystemD.lubricatingsystem11.Whichdeviceconvertselectricalenergyintomechanicalenergy?A.GeneratorB.ElectricmotorC.TransformerD.Rectifier12.Thedirectionofrotationofathree-phaseinductionmotorcanbereversedbychanging___.A.anytwoofthethreephasewiresB.allthethreephasewiresC.thefrequencyD.thevoltage13.The___isusedtolimitthestartingcurrentofasquirrel-cagemotor.A.star-deltastarterB.direct-on-linestarterC.carbonbrushD.tachometer14.Avariablefrequencydrive(VFD)controlsthespeedofanACmotorbyvaryingthe___andfrequencyofthesupply.A.currentB.voltageC.resistanceD.powerfactor15.Athree-phaseinductionmotorwilloverheatifthe___supplyistoolow.A.voltageB.currentC.frequencyD.resistance16.Whichprotectiondeviceisinstalledinthemotorstartertoprotectthemotorfromoverload?A.ThermaloverloadrelayB.ReversepowerrelayC.FrequencyrelayD.Sequencerelay17.Anautotransformerstarterprovides___startingcurrentcomparedwithadirect-on-linestarter.A.alowerB.ahigherC.thesameD.anequal18.Electricmotorsintheengineroomshouldbeinstalledwith___topreventtheentryofwater.A.drip-proofcoversB.airfiltersC.oilcoolersD.sound-proofcovers19.The___isadevicethatautomaticallykeepstheenginespeedconstant.A.governorB.synchronizerC.rectifierD.amplifier20.Whichstatementiscorrectaboutasynchronousmotor?A.Itrunsataconstantspeedregardlessoftheload.B.Itsspeedvarieswiththeload.C.Itcannotbeusedforconstant-speeddrives.D.Ithasnomagneticfield.21.Athree-phasegeneratorproduceselectricalpowerwhenitsrotorisdrivenbythe___.A.primemoverB.propellerC.rudderD.compressor22.Thesynchronousspeedofa4-pole,60HzACgeneratoris___r/min.A.1200B.1500C.1800D.360023.Theautomaticvoltageregulator(AVR)maintainsthegeneratoroutput___constant.A.voltageB.currentC.frequencyD.power24.IftwogeneratorsruninparallelandtheirkWloadsharingisnotequal,theoperatorshouldadjustthe___.A.governorsettingsB.AVRsettingsC.circuitbreakerD.busbarprotection25.ReactivepowersharingbetweenACgeneratorsinparalleliscontrolledbyadjustingthe___.A.AVRB.governorC.startingdeviceD.coolingsystem26.Whatdoes“dead-front”meaninaswitchboard?A.Nolivepartsareexposed.B.Thefrontdoorislocked.C.Thebusbarsarenotenergized.D.Thepanelispaintedblack.27.Thecapacityofabatteryiscommonlyexpressedin___.A.ampere-hoursB.voltsC.ohmsD.watts28.Emergencylightingcircuitsshouldbesuppliedfromthe___.A.emergencyswitchboardB.mainswitchboardC.shoreconnectionD.lightingtransformeronly29.A___isusedtocontinuouslymonitorthewindingtemperatureofalargegenerator.A.resistancetemperaturedetector(RTD)B.bimetallicthermometerC.mercurythermometerD.pressuregauge30.Whenageneratormotorizesinsteadofgenerating,whichprotectionwilloperate?A.Reverse-powerprotectionB.DifferentialprotectionC.Earth-faultprotectionD.Over-speedprotection31.Adiodeallowscurrenttoflowin___.A.onedirectiononlyB.twodirectionsC.everydirectionD.nodirection32.TheoutputvoltageofaregulatedDCpowersupplyremains___whentheinputvoltagechangeswithinaspecifiedrange.A.constantB.variableC.zeroD.negative33.InPLCterminology,theCPUscanstheinputsignals,executestheprogram,andupdatesthe___inonescancycle.A.outputsB.timersC.countersD.batteries34.Whichdeviceconvertsaphysicalquantitysuchastemperatureintoanelectricalsignal?A.SensorB.RelayC.ContactorD.Fuse35.Thesignalfromathermocoupleisusuallyintheformofasmall___.A.DCvoltageB.ACvoltageC.currentpulseD.frequency36.AWheatstonebridgeiscommonlyusedformeasuring___.A.resistanceB.pressureC.speedD.level37.Inaclosed-loopcontrolsystem,the___istheelementthatmonitorstheoutputandgeneratesfeedback.A.measuringelementB.correctingelementC.amplifyingelementD.settingelement38.Whichinstrumentisusedtotestthecontinuityofacircuit?A.MultimeterB.HydrometerC.TachometerD.Barometer39.GroundfaultdetectioninamarineITsystemisbasedonthemeasurementof___currentintheprotectiveearthingconductor.A.residualB.ratedC.chargingD.exciting40.Theabbreviation“PCB”standsfor___.A.printedcircuitboardB.powercontrolboxC.primarycontrolboardD.protectivecircuitbreaker41.GMDSSistheabbreviationfor___.A.GlobalMaritimeDistressandSafetySystemB.GeneralMarineDataandSignalSystemC.GlobalMonitoringandDetectionSafetySystemD.GeneralMaritimeDirectionandSafetyService42.Whichequipmentprovidestheship'spositionandUTCtime?A.GPSB.EchosounderC.RudderangleindicatorD.Tachometer43.Incaseofdistress,whichdevicetransmitsacodeddistressalertfromtheship?A.EPIRBB.AISC.VDRD.Echosounder44.The___isinstalledonthebridgeandusesradiowavestodetectothershipsorobstacles.A.radarB.anemometerC.trimmeterD.dynamometer45.Whatistheprimaryfunctionofanechosounder?A.TomeasurethedepthofwaterundertheshipB.TomeasurethespeedoftheshipC.TomeasurethewinddirectionD.Toreceiveweathercharts46.AnAIStransmitsinformationincludingtheship'sidentity,position,courseand___.A.speedB.draftC.cargotypeD.enginetype47.The___isusedtoreceivenavigationalandmeteorologicalwarningsatsea.A.NAVTEXB.VDRC.echosounderD.gyrocompass48.Theautopilotismainlyusedtomaintaintheship's___.A.headingB.speedC.draftD.list49.WhichofthefollowingisNOTacomponentoftheGMDSSinstallation?A.RadarB.VHFradioC.INMARSATterminalD.NBDP50.Thesatellitecommunicationsystemwidelyusedonboardshipsiscalled___.A.INMARSATB.AISC.VDRD.SSB51.Theelectrolyteinalead-acidbatteryisamixtureof___andwater.A.sulphuricacidB.nitricacidC.hydrochloricacidD.boricacid52.Whenchargingalead-acidbattery,thechargingroomshouldbewell___.A.ventilatedB.illuminatedC.closedD.pressurized53.Explosionofalead-acidbatteryismainlycausedbytheaccumulationof___.A.hydrogengasB.oxygengasC.carbondioxideD.nitrogengas54.Whichtypeoflamphasthehighestluminousefficacy?A.LEDlampB.IncandescentlampC.MercurylampD.Fluorescentlamp55.Athree-corecableconsistsofthreeinsulatedconductorsandanoverall___.A.sheathB.switchC.armatureD.rotor56.Toprotectanelectriccircuitagainstearthfaults,a___isused.A.residualcurrentdevice(RCD)B.reversepowerrelayC.synchronoscopeD.ohmmeter57.Thecross-sectionalareaofacableischosenbasedonthe___andthepermissiblevoltagedrop.A.current-carryingcapacityB.insulationresistanceC.surfacetemperatureD.mechanicalstrengthonly58.Watertightcabletransitsthroughbulkheadsaresealedwith___.A.cableglandsB.cabledrumsC.cablestrapsD.cableclips59.Thetemperatureclassofexplosion-proofelectricalequipmentindicates___.A.themaximumsurfacetemperatureB.theminimumworkingvoltageC.theratedpoweroutputD.thedegreeofcorrosionresistance60.HazardousareasareclassifiedasZone0,1or2accordingto___.A.theprobabilityanddurationofanexplosiveatmosphereB.thetemperatureoftheareaC.thesizeofthespaceD.thetypeofpaintused61.Theenginecontrolandmonitoringsystemisdesignedtoallowtheengineroomtobeoperated___.A.unattendedB.manuallyC.bytheportauthorityD.onlyatsea62.Inanunattendedmachineryspace(UMS),thealarmsignalsaretransferredtothe___.A.bridgeB.chiefengineer'scabinonlyC.enginecontrolroomonlyD.cargocontrolroom63.Inanalarmsystem,pressingthe___buttonsilencestheaudiblealarm.A.acknowledgeB.resetC.testD.option64.Whichdeviceautomaticallycontrolsthewaterlevelinaboiler?A.FeedwaterregulatorB.FueloilheaterC.TurbochargerD.Condenser65.Whichdevicedirectlyadjuststhefuelindexofthemainengineaccordingtothebridgecommand?A.ElectronicgovernorB.AVRC.SynchronizerD.Batterycharger66.Thespeedsensormeasuresthe___speedofthecrankshaft.A.rotationalB.windC.ship'sD.current67.Theload-upfunctioninthemainengineremotecontrolisprovidedto___.A.limitthethermalloadduringaccelerationB.increasethefuelconsumptionC.decreasethecoolingwatertemperatureD.changethepropellerpitch68.Theautomationsystemcandisplaythereal-timevaluesofpressureandtemperature.Thisfunctioniscalled___.A.monitoringB.programmingC.printingD.synchronizing69.Thesynchronizingunitautomaticallymatchesvoltage,frequencyand___beforeclosingthebreaker.A.phasesequenceB.powerfactorC.insulationresistanceD.harmoniccontent70.Beforeworkingonelectricalequipment,anelectro-technicalofficermust___.A.isolateandlockouttheequipmentB.increasetheloadC.disconnecttheearthconnectionD.removethefuseandkeepitinthepanel71.A“permittowork”isespeciallyrequiredforworkon___.A.high-voltageequipmentB.lightingcircuitsbelow50VC.batterytestersD.portabletools72.Beforetestingtheinsulationresistanceofacable,youmustmakesurethatthecircuitis___.A.de-energizedB.loadedC.earthedD.reversed73.Ifanelectricshockoccurs,thefirstactionshouldbe___.A.cutoffthepowersupplyB.pourwateronthevictimC.pullthevictimwithbarehandsD.calltheportstatecontrol74.Whichdocumentisusedtorecorddetailsofmaintenanceperformedonelectricalequipment?A.MaintenancerecordB.Watch-keepingscheduleC.CrewlistD.Cargomanifest75.The___isusedtoconnecttheship'selectricalsystemtotheportpowersupply.A.shoreconnectionboxB.emergencygeneratorC.mainengineD.rudder76.AccordingtoIEC,theprotectiveearthconductorisidentifiedbythecolor___.A.green/yellowB.redC.blueD.white77.Onboardships,“highvoltage”normallymeansavoltageexceeding___.A.1000VB.250VC.110VD.50V78.Whichsymbolindicatesanelectricalshockhazard?A.AlightningflashwithinatriangleB.AredcirclewithadiagonallineC.AbluesquarewithawhiteletterPD.Ayellowdiamondwithablackcross79.Whenthemainpowerfails,theemergencygeneratornormallysuppliespowerto___.A.emergencylighting,navigationaidsandvitalequipmentB.airconditioningforallcabinsC.cargowinchesD.mainenginepropulsion80.Theabbreviation“PLC”standsfor___.A.programmablelogiccontrollerB.powerlinecommunicatorC.primaryloadcircuitD.parallellinkconnection二、阅读理解（每题1分，共20分）Passage1Anincreasingnumberofshipsarebeingfittedwithelectricpropulsionsystems.Insuchsystems,themaindieselenginesdrivealternatorsinsteadofpropellers.Theelectricalpowergeneratedbythealternatorsissuppliedtothemainswitchboardandthenconvertedbyfrequencyconverterstofeedthepropulsionmotors.Thespeedanddirectionoftheshiparecontrolledbyadjustingthevoltageandfrequencyappliedtothepropulsionmotors.Electricpropulsionoffersseveraladvantages,includingimprovedmanoeuvrability,lowerfuelconsumptionatpartialloads,andgreaterflexibilityinthearrangementofmachineryspacesandreducednoise.81.Inanelectricpropulsionsystem,themaindieselenginesareusedtodrive___.A.alternatorsB.propellersC.compressorsD.pumps82.Whatisthefunctionoffrequencyconvertersinthissystem?A.ToconvertthegeneratedpowertofeedthepropulsionmotorsB.ToconvertDCpowerintoACpowerC.ToraisethevoltageofthemainbusbarD.Tocontrolthecoolingwatersystem83.Thespeedanddirectionoftheshiparecontrolledbyadjusting___.A.thevoltageandfrequencyappliedtothepropulsionmotorsB.thepitchoftherudderonlyC.theoutputoftheboilerD.thespeedofthealternatoronly84.Whichofthefollowingismentionedasanadvantageofelectricpropulsion?A.ImprovedmanoeuvrabilityB.SimplerengineconstructionC.LowerinitialcostD.Smallerfuelstoragetanks85.WhichofthefollowingisNOTmentionedasanadvantageinthepassage?A.LessrequirementforengineersB.LowerfuelconsumptionatpartialloadsC.GreaterflexibilityinarrangementD.Reducednoise86.Theword“alternators”inthiscontextmeans___.A.ACgeneratorsB.electricmotorsC.switchboardsD.transformers87.Theelectricalpowergeneratedbythealternatorsisfirstsuppliedto___.A.themainswitchboardB.thepropellershaftC.thebatterybankD.thestartingairreceiver88.Electricpropulsionsystemscanimprovetheship's___.A.manoeuvrabilityB.cargocapacityC.anchorholdingforceD.hullstrength89.Accordingtothepassage,electricpropulsionprovidesflexibilityinthearrangementof___.A.machineryspacesB.cargoholdsC.lifeboatsD.bunkertanks90.Themaintopicofthispassageis___.A.electricpropulsionsystemsB.dieselenginemaintenanceC.propellerconstructionD.wireropeinspection91.WhatisthemainresponsibilityofanETO?A.Tomaintainandrepairelectrical,electronicandcontrolsystemsB.TonavigatetheshipC.ToloadanddischargecargoD.Tooperatetheanchoringequipment92.WhichofthefollowingismaintainedbytheETOaccordingtothepassage?A.GMDSSequipmentB.MainenginebedplateC.PropellershaftD.Rudderstock93.Beforemaintenancework,theETOmust___.A.obtainpermission,isolatetheequipmentandplaceawarningtagB.starttheemergencygeneratorC.disconnecttheshoresupplycableD.testthefirepump94.Thepurposeofplacingawarningtagisto___.A.warnothersnottoenergizetheequipmentB.showtheequipmenttypeC.recordthemaintenancetimeD.indicatetheequipmentoperator95.Howshouldthemaintenanceberecorded?A.Apropermaintenancerecordshouldbekeptforeachsystem.B.Onlyverbalreportsarerequired.C.Norecordisnecessary.D.Therecordshouldbesenttotheshipyardonly.96.Ifafaultmayaffectthesafeoperationoftheship,theETOshould___.A.reportittothechiefengineerimmediatelyB.waituntilthenextportC.informthepassengersfirstD.repairitwithouttellinganyone97.Theword“troubleshooting”isclosestinmeaningto___.A.faultfindingB.repairweldingC.oilchangingD.computerprogramming98.WhichofthefollowingisNOTmentionedinthepassage?A.PaintingthehullB.CheckingthemainandemergencyswitchboardsC.TestingalarmandmonitoringsystemsD.Troubleshootingfaultsintheenginecontrolsystem99.TheETOshouldbefamiliarwith___.A.theship'ssafetyproceduresB.thecargostowageplanC.thecharterpartyD.thebilloflading100.Thepassageismainlyabout___.A.thedutiesofanelectro-technicalofficerB.theconstructionofthemainengineC.theoperationofthecargopumpD.themaintenanceoftherudder参考答案与解析一、单项选择题1.答案：C2.答案：B解析：mainswitchboard是“主配电板”，其功能是把电能分配（distribute）到各用电设备。3.答案：D4.答案：A5.答案：A解析：兆欧表（megger）专门用于测量绝缘电阻，单位通常为兆欧（MΩ）。6.答案：B7.答案：A解析：并车时除电压、频率、相位外，还必须检查相序一致，否则并车瞬间会产生巨大冲击电流。8.答案：B