船員電工英語考試題及答案

一、單項選擇題（每題2分，共20分）1.Whatdoes“switch”mean?（）A.插座B.開關C.燈泡2.Thesymbolfor“ground”is（）A.LB.NC.G3.“Voltage”ismeasuredin（）A.ampsB.voltsC.ohms4.Whichtoolisusedtomeasurecurrent?（）A.MultimeterB.ScrewdriverC.Pliers5.“Insulator”isamaterialthat（）A.conductselectricitywellB.resiststheflowofelectricityC.generateselectricity6.ThecoloroflivewireinaUKelectricalsystemisusually（）A.blueB.brownC.green-yellow7.Whatis“circuitbreaker”inChinese?（）A.保險絲B.繼電器C.斷路器8.“Frequency”ismeasuredin（）A.hertzB.wattsC.joules9.A“diode”has（）A.twoterminalsB.threeterminalsC.fourterminals10.“Transformer”isusedto（）A.changevoltageB.measurevoltageC.storeelectricity二、多項選擇題（每題2分，共20分）1.Whichofthefollowingareelectricalsafetymeasures?（）A.WearinginsulatedglovesB.UsingtoolswithbrokeninsulationC.Checkingelectricalequipmentregularly2.Commonelectricalcomponentsinclude（）A.ResistorsB.CapacitorsC.Inductors3.Whichcolorsareusedforelectricalwiresinsomeelectricalsystems?（）A.RedB.BlackC.White4.Toolsforelectricalworkmayinclude（）A.SolderingironB.WirestripperC.Clampmeter5.Electricalpowercanbecalculatedby（）A.Voltage×CurrentB.Resistance×CurrentC.Voltage2/Resistance6.Whichofthefollowingcancauseanelectricalfire?（）A.OverloadingcircuitsB.UsingproperfusesC.Damagedinsulation7.Inathree-phaseelectricalsystem,thephasesare（）A.PhaseAB.PhaseBC.PhaseC8.Electricalprotectiondevicesare（）A.FusesB.CircuitbreakersC.Relays9.Semiconductordevicesinclude（）A.DiodesB.TransistorsC.Integratedcircuits10.Whatarethefunctionsofacapacitor?（）A.StoringelectricalchargeB.FilteringsignalsC.Changingvoltage三、判斷題（每題2分，共20分）1.Aconductorallowselectricitytoflowthroughiteasily.（）2.Abatterycanconvertchemicalenergyintoelectricalenergy.（）3.Ohm'slawstatesthatcurrentisinverselyproportionaltovoltage.（）4.Amultimetercanonlymeasurevoltage.（）5.Insulationmaterialshavehighresistance.（）6.Ashort-circuitcancausealargeamountofcurrenttoflow.（）7.Three-phasepowerismoreefficientthansingle-phasepowerforsomeapplications.（）8.Arelayisamechanicalswitch.（）9.Thehighertheresistance,themorecurrentwillflowthroughacircuit.（）10.LEDsareatypeoflightsourcethatuseverylittlepower.（）四、簡答題（每題5分，共20分）1.Whatistheimportanceofelectricalsafetyonaship?Answer:Electricalsystemsonshipsarecomplex.Ensuringelectricalsafetycanpreventelectricshockstocrew,avoidelectricalfiresthatcouldendangertheshipanditscrew,andguaranteethenormaloperationofvariouselectricalequipmentfornavigationandotherfunctions.2.Describethefunctionofaresistorinacircuit.Answer:Aresistorisusedtoresisttheflowofelectriccurrentinacircuit.Itcancontroltheamountofcurrentflowingthroughacircuit,dividevoltage,andhelpinadjustingtheelectricalparametersofthecircuittomeettherequirementsofdifferentelectricalcomponents.3.Howtochoosetherightfuseforanelectricalcircuit?Answer:Considertheratedcurrentofthecircuit.Thefuse'sratedcurrentshouldbeslightlyhigherthanthenormaloperatingcurrentofthecircuit,butlowerthanthecurrentthatcouldcausedamagewhenthereisafault,toprotectthecircuitfromover-currentsituations.4.WhatisthedifferencebetweenACandDCpower?Answer:AC(alternatingcurrent)periodicallyreversesitsdirectionofflow,whileDC(directcurrent)flowsinonlyonedirection.ACisoftenusedforpowerdistributionoverlongdistances,andDCiscommonlyusedinsomeelectronicdevicesandbattery-poweredequipment.五、討論題（每題5分，共20分）1.Discussthechallengesofmaintainingelectricalsystemsonashipinahumidenvironment.Answer:Inahumidenvironment,moisturecanpenetrateelectricalcomponents,causingcorrosionandshort-circuits.Condensationmayformonequipment,affectinginsulationproperties.Saltintheaircanalsocorrodemetalpartsofelectricalsystems.Regularinspections,properventilation,andmoisture-proofmeasuresarecrucial.2.Howcancrewmembersimprovetheirelectricalsafetyawareness?Answer:Crewmemberscanparticipateinregularelectricalsafetytrainingtounderstandpotentialhazardsandsafetyprocedures.Theyshouldfollowsafetyregulationsstrictlywhenoperatingelectricalequipment,andreportanyelectricalproblemspromptly.Also,maintaininggoodhousekeepingaroundelectricalareashelps.3.Explaintheimpactofnewelectricaltechnologiesonshipoperations.Answer:Newelectricaltechnologieslikemoreefficientpowergenerationsystemscanreducefuelconsumption.Advancedautomationandcontrolsystemsimprovethereliabilityandprecisionofshipoperations.However,crewneedtobetrainedtooperateandmaintainthesenewtechnologies,andtheremaybecompatibilityissueswithexistingsystems.4.Discusstheroleofaship'selectricalsysteminensuringnavigationsafety.Answer:Theelectricalsystempowersnavigationaidssuchasradar,GPS,andlights.Astableandreliableelectricalsupplyensuresthesedevicesworkproperly,enablingaccuratepositiondetermination