大学英语期末考试A.docx
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大学英语期末考试A.docx
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大学英语期末考试A
大学英语期末考试(A)
第一部分:
单选题
1.Thestartingcurrentofana.c.motoris_____theratedcurrent.
A.thesameasB.muchlargerthanC.lessthanD.equals
2.Witha_____loadthevoltageandcurrentareinphase.
A.pureresistanceB.capacitiveC.inductiveD.Noneoftheabove
3.Theemergencygeneratororemergencybatteryisconnectedto_____onmostlargeships.
A.distributionboardsB.sectionboardsC.emergencyswitchboardsD.mainswitchboards
4.Switchboardsmaybeofthedead-fronttypeinwhichalllivepartsareinstalledbehind_____andonlytheoperationhandlesandinstrumentsareonthefront.
A.thecapstanB.thecollectorC.thepanelsD.thesurface
5.Remotecontrolmeansthat_____.
A.thesystemismannedmanuallyB.thesystemissituatedremotelyfromtheoperator
C.thesystemiscontrolledautomaticallyD.alltheabove
6.Thedifferencebetweenmeasuredanddesiredvaluesiscalled_____.
A.make-upB.desiredvalueC.deviationD.setvalue
7.Priortoanyoverhaulworkonelectricequipment,itisimportanttoensurethecircuitsare_____.
A.liveB.deadC.excitedD.online
8.Beforestartinganenginebyair,theenginemust_________
A.beturnedbyaturninggearforatleastoneminute
B.beturnedbyaturninggearforatleasttwominutes
C.beturnedatleastonecompleteturnD.beturnedatleasttwocompleteturns
9.Shorepowermustbe_____duringdockrepair.
A.disconnectedB.switchedoffC.cutoffD.connected
10.Theswitchboardsfora.c.systemsdifferfromthed.c.switchgearinthattheopentypepanelsaregenerally_____andthedead-frontswitchgearisthecommonrule.
A.permissiblyB.permissibleC.nopermissibleD.notpermissible
11.Currentchangingindirectionandrisingandfallinginvalueis_____.
A.A.C.B.D.C.C.generatorD.freshwatergenerator
12.Theseparatesuppliesareconnectedineitherstarordeltaformation.Thestarformationismostcommonlyusedandrequires_____slip-ringsonthealternator.
A.twoB.threeC.fourD.five
13.Thedifferencebetweenmeasuredanddesiredvaluesiscalled
A.offsetB.errorC.deviationD.setvalue
14.Afterthetroubleoftheautomaticcontrolsystemhasbeencompletelyeliminated,assistanceis_____required.
A.remainedB.stillC.nolongerD.muchmere
15.Thefieldcoils_____andthearmatureis_____.Thisisinfactthearrangementadoptedforlarge,heavydutyalternators.
A.stationary/rotateB.stationary/stationaryC.rotate/stationaryD.rotate/rotate
16.Ana.c.switchboardisusually_____thecorrespondingd.c.boardbecauseofthehighervoltageandlowercurrentsandsmallerbus-bars.
A.largerandheavierthanB.asmuchasC.smallerandlighterthanD.moredangerousthan
17.In_____thecontrolactionisindependenton(of)theoutput.
A.aclosedloopcontrolsystemB.anopenloopcontrolsystem
C.aboilercontrolsystemD.asteeringgearcontrolsystem
18.It_____foranemergencygeneratortorequireparalleling.
A.isusualB.isnotusualC.isnecessaryD.isnotimpossible
19.Whichofthemotorsforthedeviceslistedbelowisfittedwithaninstantaneousoverloadrelay?
A.FanB.PumpC.WinchD.Machinetool
20.Anelectricaldevicewhichpreventsanactionfromoccurringuntilallotherrequiredconditionsaremetiscalleda/an_____.
A.limitB.monitorC.modulatorD.interlock
21.Acircuitbreakerandafusehaveabasicsimilarityinthattheyboth_____.
A.canberesettoenergizethecircuitB.shouldopenthecircuitwhenoverloaded
C.willburnoutwhenanovercurrentflowdevelopsD.Alloftheabove
22.AconstantoutputvoltagefromanACgeneratorismaintainedbythe_____.
A.primemovergovernorB.excitergeneratorC.voltageregulatorD.reversepowerrelay
23.Whatwillbethephaseanglerelationshipofasix-pole,three-phase,rotatingfieldgenerator_____.
A.60B.120C.180D.360
24.Copperisoftenusedasanelectricalconductorbecauseit_____.
A.hashighresistanceatlowtemperaturesB.hasahighlypolishedsurface
C.isabletopasscurrentwithlittleoppositionD.holdsinsulationtogetherwell
25.Inaseriescircuit,whichvaluewillremainunchangedatallplacesinthecircuit?
A.VoltageB.CurrentC.ResistanceD.Inductance
26.Thetotalresistanceofaparallelcircuitisalways_____.
A.largerthanthegreatestbranchresistanceB.smallerthanthelowestbranchresistance
C.equaltothesumoftheindividualbranchresistancesD.one-halfthesumoftheindividualbranchresistances
27._____meanstheGovernmentoftheStatewhoseflagtheshipisentitledtofly.
A.AssemblyB.OrganizationC.CompanyD.Administration
28.Thepartoftheshipboardelectricalsystemusedtocontrolthedistributionofpowertothebranchcircuits,isthe_____.
A.bridgecontrolpanelB.disconnectlinksC.governorrelayboxD.mainswitchboard
29.Theportstatecontrolinspectioniscarriedoutonthebasisofthefollowinginternationalconventions.Amongthem,whichonewasnotsetbyIMO?
A.LL66B.ITC69C.ILONo.147D.SOLAS74r
30.Possiblephaserelationshipsbetweenvoltageandcurrentinanalternatingcurrentcircuitincludewhichofthefollowingconditions?
A.Currentandvoltagemaybeinphase.B.Currentmayleadthevoltage.
C.Currentmaylagthevoltage.D.Alloftheabove.
31.Anammetershouldbeusedtomeasure_____.
A.thevoltagebetweentwopointsinacircuitB.circuitcontinuity
C.currentflowinacircuitD.totalorpartialcircuitresistance
32.TheInternationalOilPollutionPreventionCertificaterequiredbyMARPOLisissuedtoChinaflagbythe_____.
A.IMOB.CCSC.USCGD.PICC
33.WhenvoltageandcurrentdevelopedinanACcircuitreachtheirpeakvaluesatthesametime,thepowerfactoris_____.
A.laggingB.leadingC.maximumD.minimum
34.Voltagewillalwaysleadcurrentina/an_____.
A.capacitivecircuitB.inductivecircuitC.magneticcircuitD.resistivecircuit
35.Whenparalleled,ACgeneratorsmusthavethesame_____.
A.frequencyB.numberofphasesC.phaserotationD.Alloftheabove
36.PriortoclosingthebreakerwhenparallelingtwoACgenerators,therecommendedpracticeistohavethefrequencyoftheincomingmachine_____.
A.slightlylessthanthelinefrequencyB.thesameasthelinefrequency
C.slightlygreaterthanthelinefrequencyD.Alloftheabove
37.ApersononafixedorfloatingplatformengagedinoilexplorationMAYdischargefoodwasteintotheseawhenthedistancefromthenearestlandisatleast
A.3nauticalmilesB.5nauticalmilesC.12nauticalmilesD.25nauticalmiles
38.Theunitofelectricalpoweristhe_____.
A.ampereB.kilovoltC.wattD.farad
39._____isaprecautionwhichcontributestoavoidingtroubleundernormaloperatingconditions.
A.ConstantinspectionB.KeepingconstantloadC.RemainingconstanttemperatureD.Varyingspeed
40._____shouldnotundertakeanytaskwhichwillinterferewiththesupervisiondutiesrelatingtothemainmachineryandassociatedequipment.
A.ThewatchkeepingpersonnelB.Thechiefengineer
C.ThepersononabunkerbargeD.Thedutydeckofficer
41.Bridgeordersmustbe_____andarecordofanyrequiredchangesinspeedanddirectionshouldbekept..A.slowlycarriedawayB.carriedoutwithaperiodofdelay
C.promptlycarriedoutD.paidbythecaptain
42.Theofficerinchargeoftheengineeringwatchshallensurethatallmachineryinvolvedwiththemaneuveringoftheshipcanimmediatelybeplacedinthe_____ofoperationwhennotifiedthattheshipisincongestedwaters.
A.manualmodeB.automaticmodeC.remotemodeD.follow-upmode
43.Whileloadingbunkers,younoticeoilonthewaternearthevessel.Whatshouldyoudofirst.
A.StoploadingB.Notifytheharbouradministration
C.Determineifthevesselisthesourceofthepollution
D.Startthemainengineandputthemingeartodispersethespill
44.Thebasictraininginfirepreventionandfirefightingshouldincludethepracticalelementswhichshouldallowthetraineestoacquiretheabilityto_____.
A.useself-containedbreathingapparatusB.usevarioustypesofportablefireextinguishers
C.effectarescueinasmoke-filledspacewearingbreathingapparatusD.Alloftheabove
45.Theorder“_____”means“Maximummaneuveringenginerevolutionforahead
propulsion.”
A.FullAheadB.HalfAheadC.FullAsternD.HalfAstern
46.Whyshiprepairisaninherentlydifficultbusinesstomanageintheconventionalsense?
A.BecauseitisdifficulttoplanandmanageB.Becauseitiscannotbewillcategorized
C.BecauseitisadifficultworkforpeopletoundergoD.Becauseitisseldomresearchedbyresearcher
47.Thefire-fightingpracticaltrainingshouldtakeplaceinspaceswhichprovidetrulyrealistictrainingconditions,andwheneverpossibleandpracticalshouldbecarriedoutin_____.
A.darknessB.daylightC.simulatedengine-roomD.alloftheabove.
48.Thedistancebetweenthebottomofthehullandthewaterlineiscalled_____.
A.tonnageB.reservebuoyancyC.draftD.freeboard
49.Theapprovalperiodforashipboardoilpollutionemergencyplanexpiresafter_____.
A.oneyearB.twoyearsC.fouryearsD.fiveyears
50.Ashipboardoilpollutionemergencyplanisrequiredof_____.
A.allvessels,regardlessofsizeandcommercialapplication
B.anybargeorothershipwhichisconstructedoroperatedinsuchamannerthatnooilinanyformcanbecarriedaboard
C.anoiltankerof150grosstonsorabove,orothershipof400grosstonsorabove
D.anoiltankerof400grosstonsandabove,orothershipsof150grosstonsandabove
51.Topreventthespreadoffirebyconduction,youshould_____.
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