新《輪機(jī)英語(yǔ)》考試復(fù)習(xí)題庫(kù)大全（附答案）

PAGEPAGE188新《輪機(jī)英語(yǔ)》考試復(fù)習(xí)題庫(kù)大全（附答案）一、單選題1.Electricalpowerisexpressedin_____.()A、ohmsB、voltsC、ampsD、watts答案：D2.Thesalinometerisprovidedwith_____fittedonthefreshwaterpumpdeliveryside.()A、demisterB、electrodeC、heaterD、ejector答案：B3.Whenseparatinglubeoilinpurifier,theoptimalseparatingquantityis_____oftheratedquantityonnameplate.()A、100%B、1/2C、1/5D、1/3答案：D4.Oneofthepurposesofchemicallytreatingboilerwateristo_____.()A、constantlydecreaseealkalinityB、reduceblowdownfrequencyC、eliminatewatersidecleaningD、reducescaleformation答案：D5.Theby-productsofoxidation,asaresultofwatercontaminationofhydraulicoil,aregenerally_____.()A、removedbycellulosetypefiltersB、gums,varnishes,andacidsC、alwaysneutralizedbyoiladditivesD、harmlessandhavenoeffectonsystemponents答案：B6.Acentrifugearrangedtoseparatetwoliquidsisknownas_____.()A、anoilywaterseparatorB、apurifierC、acentrifugalpressorD、aclarifier答案：B7.Thesafetyvalvesaremountedinpairsto_____theboileragainstoverpressure.()A、useB、releaseC、protectD、effect答案：C8.Everythingisingoodorderexcepttheoilseparator.()A、Everythingisingoodorder.B、Thereissomethingwrongwiththeoilseparator.C、Thereissomethingwrongwiththeoilywaterseparator.D、Thereissomethingwrongwiththesewagewaterseparator.答案：B9.Iamgoingtodismantletheoilyseparator.()A、Theoilyseparatorwillbereassembled.B、Theoilyseparatorwillbemounted.C、Theoilyseparatorwillbedismounted.D、Theoilyseparatorwillbesecured.答案：C10.Theengineerisinspectingtheoilywaterseparator.()A、Theoilywaterseparatorisbeingchecked.B、Theoilywaterseparatorisbeingdismantled.C、Theengineeristalkingabouttheoilywaterseparator.D、Theoilywaterseparatorisbeingrepaired.答案：A11.SurelyIwillinspecttheincineratorburnermorecarefullyandmakesureitisnotblocked.()A、Iwillchecktheincineratorburnermorecarefully.B、Iwillchecktheincineratorburnersurely.C、Iwillcheckheboilerburnermorecarefully.D、Iwillchecktheboilerburnersurely.答案：A12.Pleaseinspecttheoilpressureofthesteeringgearsystematonce.()A、Whatisthematterwiththesteeringgear?B、Whatistheconditionofthesteeringgear?C、Changethesteeringgearintohand-drivensteeringgear.D、Checktheoilpressureofthesteeringgearsystemimmediately.答案：D13.Weshouldtestthesteeringgeareachvoyage.()A、Thesteeringgearshouldbetestedeachweek.B、Thesteeringgearshouldbetestedeachvoyage.C、Thesteeringgearshouldbetestedeachmonth.D、Thesteeringgearshouldbetestedeachday.答案：B14.Theballastpumpisingoodorder.()A、Theballastpumpisoutoforder.B、Theballastpumpworkswell.C、Thereissomethingwrongwiththeballastpump.D、Theballastpumpdoesnotrunsmoothly.答案：B15.Closethelowerandupperseawaterinletvalvesimmediately.()A、Shutoffboththelowerandupperseawaterinletvalvesatonce.B、Shutoffboththelowerandupperseawateroutletvalvesatonce.C、Closetherightseawaterinletvalvenow.D、Closeeithertheupperorlowerseawaterinletvalvesrightnow.答案：A16.PleasedischargeNo.5portballasttank.()A、No.5portballasttankwillbefilled.B、No.5portballasttankwillbede-ballasted.C、ThereareproblemswithNo.5portballasttank.D、No.5portballasttankhasbeenfilledup.答案：B17.Theseawaterflushingvalvesshouldbecoatedwithgreenpaint.()A、Pleasepainttheseawaterflushingvalveswithyellowcolor.B、Pleasepainttheseawaterflushingvalveswithblackcolor.C、Pleasepainttheseawaterflushingvalveswithgreencolor.D、Pleasepainttheseawaterflushingvalveswithredcolor.答案：C18.Pleasetransfer15.5tonsofballastwaterfromNo.1porttoNo.2starboard.()A、Theamountofballastwatertransferredis15.5tons.B、Therewillbetotally50.5tonsofballastwatertransferred.C、TheballastwaterwillbetransferredfromNo.2toNo.1.D、Notransferwiththeballastwater.答案：A19.Thedamagedfreshwatercoolingpumpshouldberepaired.()A、Freshwatercoolingpumpisnewlyinstalled.B、Thefeedwaterpumpshouldberepaired.C、Freshwatercoolingpumpneedsreplacing.D、Freshwatercoolingpumpshouldberepaired.答案：D20.Theballastingpumpcanbereplacedwiththemainseawaterpump.()A、Themainseawaterpumpcanbereplacedwiththeballastingpump.B、Themainseawaterpumpcanreplacetheballastingpump.C、Theballastingpumpcanbereplacedwiththefire-fightingpump.D、Theballastingpumpcanbereplacedwiththeauxiliaryseawaterpump.答案：B21.Theoutputofthefreshwatergeneratorishigh.()A、Thedischargeofthefreshwaterfailed.B、Theoutletvalveofthefreshwaterisopen.C、Thepressureofthefreshwaterisincreasing.D、Thedischargeofthefreshwaterishigh.答案：D22.There'saloudnoiseinthegearboxofthewindlass.()A、Thewindlassisnoisy.B、Thegearboxisnoisy.C、Thewindlassnoiseislow.D、Thegearboxislow.答案：B23.Wehavetousethiskindofpipeundersuchcircumstances.()A、Wecanonlyusethiskindofpipenow.B、Thiskindofpipeisgoodforuse.C、Wemayuseanotherone.D、Ilikethisone.答案：A24.Wearealsogoingtocleanthefiltersoftheballastpump.()A、Wewillcleanthefiltersofthefueloilpump.B、Thefiltersofthelubeoilpumpwillbecleaned.C、Thefiltersofthebilgepumpwillbecleaned.D、Thefiltersoftheballastpumpwillbecleaned.答案：D25.IwillrenewtheremotecontrolvalveofNo.4cranebecausethesealingconditionofthevalveispoor.()A、TheremotecontrolvalveofNo.4craneisgood.B、Thesealingconditionofthevalveispoor.C、TheremotecontrolvalveofNo.5craneisfaulty.D、TheremotecontrolvalveofNo.6craneisfaulty.答案：B26.Thatistheoil-burningDtypeauxiliaryboiler.()A、Theboilerisheatedbyexhaustgas.B、Thisboilerisheatedbygas.C、Thisboilerisheatedbyburningoil.D、Thisboilerisheatedbyburninggasoline.答案：C27.Wearegoingtochangedieseloiltofueloilfortheboiler.()A、Theboilerwillbeheatedbyliquidgas.B、Theboilerwillbeheatedbyfueloil.C、Theboilerwillbeheatedbydieseloil.D、Theboilerwillbeheatedbydieselandfueloil.答案：B28.Theinternalpartoftheboilermustbecleanedbytheyard.()A、Cleaningtheexternalpartoftheboilerintheyard.B、Cleaningtheinternalpartoftheboilerintheyard.C、Theexternalpartoftheboilermustbecleanedbychemicalsolution.D、Theinternalpartoftheboilermustbecleanedbyacidsolution.答案：B29.Thischemicalsolutioncan'tbeusedtocleantheinternalpartoftheboiler.()A、Theexternalpartoftheboilercan'tbecleanedbythischemicalsolution.B、Thischemicalsolutioncan'tbeusedtocleantheexternalpartoftheboiler.C、Thischemicalsolutioncanbeusedtocleantheexternalpartoftheboiler.D、Theinternalpartoftheboilercan'tbecleanedbythischemicalsolution.答案：D30.Theairconditioningsystemisoutoforder.()A、Theairconditioningsystemisingoodorder.B、Thereissomethingwrongwiththeairconditioningsystem.C、Theairconditioningsystemisoutofstock.D、Theairconditioningsystemrunswell.答案：B31.Theairofrefrigeratingcoolantsshouldberemovedpletely.()A、Purgetheairpletely.B、Purgetherefrigeratingcoolantspletely.C、Purgetheairandrefrigeratingcoolantspletely.D、Purgetheairofrefrigeratingcoolantspletely.答案：D32.Thereissomethingwrongwiththesteeringgear.()A、Thereissometroublewiththesteeringgear.B、Thereissomethingwrongwiththeturninggear.C、Thereisnoproblemwiththesteeringgear.D、Thereisnoproblemwiththeturninggear.答案：A33.Oilpressureofthesteeringgearishigherthannormallimit.()A、Thesteeringgearisturningslowly.B、Oillevelishigherthannormal.C、Thereisairinhydraulicoilofthesteeringgear.D、Oilpressureisabnormalinthesteeringgear.答案：D34.Youwilltellmeseveraldegreesofrudderangle.()A、Theyarediscussingthesteeringgear.B、Theyareinstallingthesteeringgear.C、Theyaretestingthesteeringgear.D、Theyarerepairingthesteeringgear.答案：C35.Theresistancetothemovementoftheglobuleinoilywatermixturedependsonitssizeandthe_____ofthefluid.()A、pressureB、velocityC、gravityD、viscosity答案：D36._____isusedtoensurethatshipsdonotdischargeoilwhenpumpingoutbilgewater.()A、OilseparatorB、OilywaterseparatorC、FilterD、Strainer答案：B37.Ifacentrifugalpumpisdrivenbyaconstantspeedelectricmotorandproducesadischargepressurelessthandesigned,thecauseisprobably_____.()A、excessivepumpspeedB、excessivesuctionheadC、wornwearingringsD、grosspumpmisalignment答案：C38.Anelectricallydrivenautomaticallyoperatingauxiliaryblowerisprovidedforslowspeedand_____ofalowspeeddieselengine.()A、maneuveringoperationsB、badbustionC、coolingD、mooringtrial答案：A39.Thepurposeofthe_____inthevaporpressioncycleistoacceptthelow-pressuredrygasfromtheevaporatorandraiseitspressuretothatofthecondenser.()A、condenserB、pressorC、evaporatorD、expansionvalve答案：B40.Inaradialpistonpump,reversalandcontroloffluidflowareacplishedbymovingthe_____.()A、centralvalveB、radialplungerC、floatingringD、cylinderbody答案：C41.The_____isusedtomeasurethevolumeofaliquidorgasthroughapipelinewithinanygivenperiodoftime.()A、flow-meterB、viseterC、micrometerD、feeler答案：A42.Whichofthefollowingconditionswouldcause‘panting'inasteamingauxiliaryboiler?()A、InsufficientbustionairB、LowwaterlevelC、FlamefailureD、Faultyflamescanner答案：A43.Ifdieselfuelwasdischargingfromthewastewateroutletofadisktypecentrifugalpurifieroperatingasaseparatoryoushouldtryto_____firstly.()A、re-primethepurifierB、removethedischargeringC、slowthepurifiertoitsproperspeedD、putinanadditionaldischargering答案：A44.Disinfectorusedinthesewagebiologicaltreatmentplantusuallyis_____.()A、chlorinewaterB、ozoneC、hypo-calciumchlorideD、calciumoxide答案：C45._____isnottheadvantageofself-primingreciprocatingpump.()A、SimplestructureB、ProducingrequireddischargepressureC、DealingwithalargeamountofvaporD、Makingaseal答案：A46.Themainsteeringgearmustbeabletosteertheshipatmaximumaheadservicespeedandbecapableatthisspeed,andattheship'sdeepestservicedraught,ofputtingtherudderfrom35degreesononesideto30degreesontheothersidewithinno_____.()A、morethan28secondsB、morethan60secondsC、lessthan28secondsD、lessthan60seconds答案：A47.Tocloseabutterflyvalve,itisonlynecessarytoturnthehandle_____.()A、AturnB、HalfofaturnC、One-thirdofaturnD、Aquarterofaturn答案：D48.Theliquidentersthepump-housingonthesuctionside,andiscarriedaroundbetween_____ofthegearwheels.Theliquidisdischargedthroughthedischargeline.()A、theteethB、theimpellerC、thevaneD、thevolute答案：A49.Whichoneisnotthenormaloperationforboilershutdown?()A、Carryoutsootblowing,ifpermissible.B、ChangefuelsupplytodieseloilC、ClosesteamstopvalvesonboilerwhenpressureisreducedD、Drainboileremptywhenithascooleddown答案：D50.Brinedensityinadistillingplantismeasuredwitha/an_____.()A、psychrometerB、salinometerC、anemometerD、sphygmomanometer答案：B51.Theoilsludgeisburntinthe_____onboard.I'llshowyoutheashes.()A、boilerB、mainengineC、auxiliaryengineD、incinerator答案：D52.WhichofthefollowingmodesofheattransferdoesNOTrequireanyphysicalcontactbetweenawarmerandacoolersubstance?()A、RadiationB、ConductionC、NaturalconvectionD、contactdirectly答案：A53.Thecapacityofmanyairconditioningplantsissuchthatundertropicalconditionsnearlyallcontrolvalvesmovetothe_____position.()A、fullyopenB、shutC、semiopenedD、closed答案：A54.Sub-coolingincreasesthe_____oftherefrigerationcycle.()A、capacityB、refrigerationeffectC、massflowrateD、volumeflowrate答案：B55.Theboilerfeedpumpdischargepressureishigherthanthesteamdrumpressureto_____.()A、ensurefeedwaterflowintotheboilerB、keepthesteamdrumpressurehighC、preventwaterhammerinthefeedlineD、helpthefeedwaterflashtosteam答案：A56.Theliquidentersthepump-housingonthesuctionside,andiscarriedaroundbetweentheteethof_____.Theliquidisdischargedthroughthedischargeline.()A、ThegearwheelB、TheimpellerC、ThepistonD、theplunger答案：A57.Forapurifier,changingtoagravitydiscwithlargerholediameterwillmovetheinterfacetowardsthe_____.()A、bowlperipheryB、bowlcenterC、uppersurfaceD、lowersurface

船舶電氣及自動(dòng)化部分答案：A58.Whenthetwovoltagesuppliesareinphasethepointerisstationaryinthe_____position.()A、11o'clockB、12o'clockC、10o'clockD、9o'clock答案：B59._____isusedtoparallelingandremovingtheloadofthealternators.()A、GeneratorcontrolpanelB、ParallelingpanelC、LoadpanelD、Busbar答案：B60.Weshould_____beforetheoperationofshipgenerator'sparallelingoff.()A、transfertheloadB、restartthegeneratorC、cutoffthepowersupplyD、increasetheload答案：A61._____isamachinebywhichelectricalenergyistransformedintomechanicalenergy.()A、AnalternatorB、AnelectricmotorC、AdieselengineD、Amainswitchboard答案：B62.Theunitsmustincorporateanaudio-visualalarmsystemwhichesintooperationwhenanyrunningconditionis_____.()A、undercontrolB、ingoodC、changedD、outoforder答案：D63.In_____thecontrolactionisindependentoftheoutput.()A、aclosedloopcontrolsystemB、anopenloopcontrolsystemC、aboilercontrolsystemD、asteeringgearcontrolsystem答案：B64.Switchboardsmaybeofthedead-fronttypeinwhichalllivepartsareinstalledbehind_____andonlytheoperationhandlesandinstrumentsareonthefront.()A、thecapstanB、thecollectorC、thepanelsD、thesurface答案：C65._____isnotinstalledontheemergencyswitchboard.()A、ControlpanelB、parallelingpanelC、LoadpanelD、Bus-bar答案：B66.Tocontroladeviceorsystemistoadjustorvary_____whichaffectit.()A、thestructuresB、thelinesC、theparametersD、thelocation答案：C67.Whatcannotaffecttheinsulationresistance?()A、moistureB、dirtC、electricityD、oildeposits答案：C68._____isprovidedforeachgeneratorwithselectorswitchtoreadthecurrentineachphase.()A、AnammeterB、AvoltmeterC、AfrequencymeterD、Asynchroscope答案：A69.Themainswitchboardismadeupoffollowingpartsexcept_____.()A、bus-barB、parallelingpanelC、shorepowerboxD、machinerypanelofthemaingenerator答案：C70.Electricalcircuitsareprotectedagainstoverheatingbymeansofa/an_____.()A、circuitbreakerB、amplifierC、Diode(二極管)D、capacitor答案：A71.Brushgearshouldbeinspectedtoensure_____brushpressureandthe_____adjustedifnecessary.()A、adequate,brushesB、little,brushesC、adequate,springsD、little,springs答案：C72._____belongstoemergencypowersupplyingequipment.()A、EmergencyfirepumpB、WindlassC、Main-seawaterpumpD、Freshwaterpump答案：A73._____controlsystemisoneinwhichthecontrolactionisindependentoftheoutput.()A、FeedbackB、NegativefeedbackC、CloseloopD、Openloop答案：D74._____isprovidedforeachgeneratorwithselectorswitchtoreadeachphasevoltage.()A、AnammeterB、AvoltmeterC、AfrequencymeterD、Awattmeter答案：B75.Theprimaryfunctionofanelectricmotoristo_____.()A、developtorqueB、generatehighvoltagesC、produceamagneticfieldD、generatehighelectricalresistance答案：A76.Priortoanyoverhaulworkonelectricequipment,itisimportanttoensurethecircuitsare_____.()A、liveB、deadC、excitedD、online答案：B77.Theclosed-loopsystemdiffersfromtheopen-loopsystemby_____.()A、thelackofafeedbackB、thepresenceofafeedbackC、thelackofaputerD、thepresenceofaputer答案：B78.Welearnthatthesimplestcontrolleractionis_____.()A、TWO-STEPCONTROLLERactionB、PROPORTIONALCONTROLLERactionC、INTEGRALCONTROLLERactionD、DERIVATIVECONTROLLERaction答案：A79.Theoperationofparallelingtwoalternatorsrequiresthevoltagestobe_____andalsoinphase.()A、zeroB、eliminatedC、differentD、equal答案：D80.Theemergencyswitchboarddoesn'thave_____.()A、controlpanelB、parallelingpanelC、loadpanelD、bus-bar答案：B81.ThesynchroscopemovesslowlyintheFASTdirectionandtheparallelingswitchisclosedasthepointerreachedthe_____position.()A、11o'clockB、12c/clockC、10o'clockD、9o'clock答案：A82.ADCgeneratorisusedtosupplydirectcurrentinordertomaintainanACgeneratorfieldandisknownasa/an_____.()A、rotorB、statorC、exciterD、armature答案：C83.Thisisanautomaticchangeoverswitch.()A、Thisisadomesticchangeoverswitch.B、Thischangeoverswitchishome-made.C、Thischangeoverswitchworksautomatically.D、Thechangeoverswitchiscontrolledbyhand.答案：C84.Synchroscopeandsynchroindicatinglightsarelocatedon_____ofmainswitchboard.()A、loadpanelB、emergencygeneratorcontrolpanelC、batterycharginganddischargingpanelD、parallelingpanel答案：D85.Inaseriescircuit,whichvaluewillremainunchangedatallplacesinthecircuit?()A、VoltageB、CurrentC、ResistanceD、Inductance答案：B86.Theopenloopcontrolsystemisoneinwhichthecontrolactionis_____thatistheoutputinnowaycontrolsthesystem.()A、dependentoftheoutputB、independentoftheoutputC、dependentoftheinputD、independentoftheinput答案：B87.Anaccidentalpathoflowresistance,allowingpassageofabnormalamountofcurrentisknownasa/an_____.()A、opencircuitB、shortcircuitC、polarizedgroundD、groundreferencepoint答案：B88.Whataboutthemostworkingtemperatureoftheelectricmotor?()A、I'dliketoknowthemostworkingpoweroftheelectricmotor.B、I'dliketoknowthemostworkingvoltageoftheelectricmotor.C、I'dliketoknowthemostworkingfrequencyoftheelectricmotor.D、I'dliketoknowthemostworkingtemperatureoftheelectricmotor.答案：D89.Thewiresshouldbecorrectlyconnectedtoassurethecorrectphasesequence.()A、Afterconnectingthewires,pleasechecktheload.B、Afterconnectingthewires,pleasechecktheswitchboard.C、Afterconnectingthewires,pleasecheckthephasesequence.D、Afterconnectingthewires,pleasechecktheresistance.答案：C90.There'smatterwiththesurfaceofthemutator.()A、Themutatorsurfacemayhavesomefaults.B、Themutatormayhavesomethings.C、Thetroubleliesonthematterofthemutator.D、Themutatormustbeintrouble.答案：A91.Keeptheelectricalequipmentclean,itisessentialforgoodoperation.()A、Itisimportanttokeeptheelectricalequipmentclean.B、Itisimportanttoknowtheoperationoftheelectricalequipment.C、Itisimportanttoknowthetypeoftheelectricalequipment.D、Goodoperationdependsonmuchelectricalknowledge.答案：A92.Pleaseadjustcontrolairpressurefrom8.0kgf/cm2to7.5kgf/cm2.()A、Thecontrolairpressurewillbereducedto7.5kgf/cm2.B、Thecontrolairpressurewillbereducedto8.5kgf/cm2.C、Thecontrolairpressurewillbereducedto7.0kgf/cm2.D、Thecontrolairpressurewillbereducedto8.0kgf/cm2.答案：A93.Thegeneratorsshouldrunwithoutsparksandnoises.()A、Thegeneratorsareworkingwithoutsparksnow.B、Thegeneratorsareworkingwithoutnoisesnow.C、Thegeneratorsshouldworkwithnoisesandsparks.D、Thegeneratorsshouldnotworkwithnoisesandsparks.答案：D94.No.1generatorhasbeenrunningfor3000hrswithoutbeingchecked.()A、No.1generatorisbeingchecked.B、No.1generatorhasn'tbeeninspectedfor3000hrs.C、No.1generatorshouldn'tbecheckedwhileitisrunning.D、No.1generatorhasn'tbeeninspectedfor2000hrs.答案：B95.Don'tturnonNo.2generatorenginewithoutbeingasked.()A、Don'tstartNo.1generatorengineifbeingasked.B、Don'tstartNo.2generatorengineifbeingasked.C、Don'tstartNo.1generatorengineuntilbeingasked.D、Don'tstartNo.2generatorengineuntilbeingasked.答案：D96.Twogeneratorsinparallelareusedgenerallyasthemainpowersupply.()A、Therearetwogeneratorsonboard.B、Themainpowersupplyisproducedwithtwogeneratorsinparallel.C、Theemergencygeneratorisbeingusednow.D、Themaingeneratorsareoutoforder.答案：B97.No.3generatorneedssomerepairfromtheshipyard.()A、Theshipyardneedssomehelp.B、TheshipyardneedsrepairingNo.3generator.C、TheshipyardwillrepairNo.3generator.D、Itisnecessaryforustogethelpfromtheshipyard.答案：C98.ThefrequencyofanACgeneratoriscontrolledbythe_____.()A、rheostatB、governorC、exciterD、capacitor答案：B99.Tocontroladeviceorsystemistoadjustorvary_____whichaffectit.()A、thestructuresB、linesC、theparametersD、location答案：C100.Anelectricaldevicewhichemploysastationaryarmatureandarotatingelectromagneticfieldisusedaboardasa_____.()A、magneticamplifierB、ship'sservicealternatorC、three-wireDCgeneratorD、saturablecorereactor答案：B101.Theelectricalpowerissuppliedfromthegeneratorsto_____fromwhereitisdistributedtoallpartsoftheshipthroughnumerousbreakersandrelays.()A、thedistributionboxB、themainswitchboardC、thesectionboardD、theemergencyswitchboard答案：B102.Electricwiresshouldhaveeachfeatureofthefollowingexcept_____.()A、flameretardantB、moistureresistantC、oilresistantD、lowconductivity答案：D103.Avoltmeterispositionedacrossthebus-barstoindicatetheir_____.()A、currentB、voltageC、powerD、resistance答案：B104.Theovercurrentrelay_____themotorcontactorwhenthemotorexceedsitsratedcurrent.()A、connectsB、tripsC、foulsD、destructs答案：B105.Theoperationof_____twoalternatorsrequiresthevoltagestobeequalandalsoinphase.()A、parallelingB、series-mountingC、runningD、controlling答案：A106._____isnotinstalledontheemergencyswitchboard.()A、AmmeterB、VoltmeterC、WattmeterD、Synchroscope答案：D107.Electricalpowerisexpressedin_____.()A、ohmsB、voltsC、ampsD、watts答案：D108.The_____isameasureofthephasedifferencebetweenvoltageandcurrentandisexpressedasthecosineofphaseangle.()A、powerB、efficiencyC、effectivepowerD、powerfactor答案：D109.Inaseriescircuit,whichvaluewillremainunchangedatallplacesinthecircuit?()A、VoltageB、CurrentC、ResistanceD、Inductance答案：B110.Whichofthefollowingmaterialsisagoodinsulator?()A、steelB、aluminumC、glassD、copper答案：C111.Theresistanceofelectricwirewilldecreaseasits_____.()A、lengthincreasesB、cross-sectionalareaincreasesC、temperatureincreasesD、percentofmetallicpuritiesincreases答案：B112.ThefrequencyofanACgeneratoriscontrolledbythe_____.()A、rheostatB、governorC、exciterD、capacitor答案：B113.ThefrequencyofanACgeneratorisadjustedbymeansofthe_____.()A、mainalternatorfieldrheostatB、exciterfieldrheostatC、primemovergovernorcontrolD、equalizingreactor答案：C114.ThepurposeofthemutatorandbrushesonaDCgeneratoristo_____.()A、changeACtoDCcurrentB、changeDCtoACcurrentC、neutralizearmaturereactionD、carrycurrenttotheoutsidecircuit答案：A115.Theoperationof_____twoalternatorsrequiresthevoltagestobeequalandalsoinphase.()A、parallelingB、series-mountingC、runningD、control答案：A116.Theoperationofparallelingtwoalternatorsrequiresthevoltagestobe_____andalsoinphase.()A、zeroB、eliminatedC、differentD、equal答案：D117.PriortoclosingthebreakerwhenparallelingtwoACgenerators,theremendedpracticeistohavethefrequencyoftheiningmachine_____.()A、slightlylessthanthelinefrequencyB、thesameasthelinefrequencyC、slightlygreaterthanthelinefrequencyD、AlloftheotherChoices答案：C118.Avoltmeterisconnectedinacircuitin_____.()A、parallelB、seriesparallelC、seriesD、relay答案：A119._____isprovidedforeachgeneratorwithselectorswitchtoreadthecurrentineachphase.()A、AfrequencymeterB、AvoltmeterC、AnammeterD、Asynchroscope答案：C120._____isusedtocontrol,modulate,monitorandprotectgeneratorset.()A、ControlpanelB、LoadpanelC、ParallelingpanelD、Busbar答案：A121.Synchroscopeandsynchroindicatinglightsarelocatedon_____ofmainswitchboard.()A、loadpanelB、emergencygeneratorcontrolpanelC、batterycharginganddischargingpanelD、parallelingpanel答案：D122._____isnotinstalledontheemergencyswitchboard.()A、ControlpanelB、ParallelingpanelC、LoadpanelD、Busbar答案：B123.Usually,emergencyelectricitysuppliesto_____onboard.()A、CargowinchB、WindlassC、SteeringgearD、Mainairpressor答案：C124.Theemergencyswitchboarddoesn'thave_____.()A、controlpanelB、parallelingpanelC、loadpanelD、busbar答案：B125._____belongstoemergencypowersupplyingequipments.()A、CargowinchB、WindlassC、SteeringgearD、Airpressor答案：C126._____isnotinstalledontheemergencyswitchboard.()A、AmmeterB、VoltmeterC、WattmeterD、Synchroscope答案：D127.Shorepowermustbe_____duringdockrepair.()A、disconnectedB、switchedoffC、cutoffD、connected答案：D128.Theovercurrentrelay_____themotorcontactorwhenthemotorexceedsitsratedcurrent.()A、connectsB、tripsC、foulsD、destructs答案：B129._____isamachinebywhichelectricalenergyistransformedintomechanicalenergy.()A、AnalternatorB、AnelectricmotorC、AdieselengineD、Amainswitchboard答案：B130.Theprimaryfunctionofanelectricmotoristo_____.()A、developtorqueB、generatehighvoltagesC、produceamagneticfieldD、generatehighelectricalresistance答案：A131.AnadvantageofDCmotorsoverACmotorsisthatthey_____.()A、arelessexpensiveB、requirelessmaintenanceC、canbestartedacrossthelineD、offeramoreeffectivemeansofcontrollingspeed答案：D132.The_____,cagerotorinductionmotoristhefirstchoicemarinemotorinmostmodernshipsbecauseofitselectricalandmechanicalsimplicity.()A、singlephaseB、twophaseC、threephaseD、fourphase答案：C133.Atransformerinanelectriccircuitservesto_____.()A、generateitsownelectricalpowerB、transformelectricalenergyintomechanicalenergyC、increaseordecreasecircuitvoltageasrequiredD、convertACcurrenttoDCcurrent答案：C134.Reducedvoltageappliedtoamotorduringthestartingperiodwill_____.()A、resultindecreasedaccelerationtimeonlyB、lowerthestartingcurrentandincreaseacceleratingtimeC、causeagreaterstartingtorqueD、increasethestartingcurrentandpumpcapacity答案：B135.Asemiconductorisamaterialwitha_____.()A、conductivityhigherthananormalconductorB、conductivityhigherthananormalinsulatorC、highconductivityatlowtemperaturesD、lowconductivityathightemperatures答案：B136.Copperisoftenusedasanelectricalconductorbecauseit_____.()A、hashighresistanceatlowtemperaturesB、hasahighlypolishedsurfaceC、isabletopasscurrentwithlittleoppositionD、holdsinsulationtogetherwell答案：C137.Sincefuseelementsaremadeofzincoranyalloyoftinandlead,themeltingpointofthefuseelementmustbe_____.()A、higherthanthatofcopperB、lowerthanthatofcopperC、equaltothatofcopperD、reachedwhentheconductoritisprotectingbees“whitehot.”答案：B138.Afusethatblowsoftenshouldbereplacedonlywithafuseof_____.()A、theremendedcurrentandvoltageratingB、highercurrentandvoltageratingC、highercurrentandlowervoltageratingD、lowercurrentandhighervoltagerating答案：A139.Electricalcircuitsareprotectedagainstoverheatingbymeansofa/an_____.()A、circuitbreakerB、amplifierC、diodeD、capacitor答案：A140.Electriccircuitsareprotectedagainstoverloadsandshortcircuitsbymeansofa/an_____.()A、circuitbreakerB、amplifierC、diodeD、capacitor答案：A141.Acircuitbreakerandafusehaveabasicsimilarityinthattheyboth_____.()A、canberesettoenergizethecircuitB、shouldopenthecircuitwhenoverloadedC、willburnoutwhenanovercurrentflowdevelopsD、shouldshortthecircuitwhenoverloaded答案：B142.Anelectricaldevicewhichpreventsanactionfromoccurringuntilallotherrequiredconditionsaremetiscalleda/an_____.()A、limitB、monitorC、modulatorD、interlock答案：D143.Ammeteristomeasurethe_____.()A、currentB、voltageC、powerD、frequency答案：A144.Priortoanyoverhaulworkonelectricequipment,itisimportanttoensurethecircuitsare_____.()A、liveB、deadC、excitedD、online答案：B145.Agroundcanbedefinedasanelectricalconnectionbetweenthewiringofamotorandits_____.()A、shuntfieldB、circuitbreakerC、metalframeworkD、inter-pole答案：C146.Whenthereisafireinalargeelectricmotor,normallytheveryFIRSTstepisto_____.()A、securetheelectricsupplyB、ventilateareatoremovesmokeC、startthefirepumpandleadouthoseD、applyfoam答案：A147.Amotorspeedregulatormaintainsthemotorspeedata_____valuedespitevariationsinloadtorque.()A、constantB、changeC、appropriateD、accurately答案：A148.Fortheportablelighting,itssafetyvoltagecannotexceed_____.()A、50VB、36VC、24VD、12V答案：B149.Deckmachinerymotorswhenfittedwithanti-condensationheaterswhichshouldbeenergizedonlywhentherelevantdeckmachineryunitsare_____.()A、workingB、notinuseC、normalD、used答案：B150.Electricwiresshouldhaveeachfeatureofthefollowingexcept_____.()A、flameretardantB、moistureresistantC、oilresistantD、lowconductivity答案：D151._____controlsystemisoneinwhichthecontrolactionisindependentoftheoutput.()A、FeedbackB、NegativefeedbackC、CloseloopD、Openloop答案：D152.In_____thecontrolactionisindependentontheoutput.()A、aclosedloopcontrolsystemB、anopenloopcontrolsystemC、aboilercontrolsystemD、asteeringgearcontrolsystem答案：B153.Thisarrangementis_____iftheelementsaredirectlyconnectedtooneanotherandthecontrolactiontakesplacewithouthumaninvolvement.()A、amanualclosedloopB、amanualopenedloopC、anautomaticclosedloopD、anautomaticopenedloop答案：C154.Theclosed-loopsystemdiffersfromtheopen-loopsystemby_____.()A、thelackofafeedbackB、thepresenceofafeedbackC、thelackofaputerD、thepresenceofaputer答案：B155.Whichkindofthefollowingcontrollersisthemostsophisticatedcontroller?()A、ProportionalcontrollerB、IntegralcontrollerC、DerivativecontrollerD、PIDcontroller答案：D156._____istheactualvalueofthecontrolledcondition.()A、DesiredvalueB、SetvalueC、MeasuredvalueD、Deviation答案：C157.Thedifferencebetweenmeasuredanddesiredvaluesiscalled_____.()A、make-upB、desiredvalueC、deviationD、setvalue答案：C158._____systemsareprovidedwithastand-bydevicewhichwillautomaticallybeputinuseintheeventoftherunningdevicefailingthroughafaultcondition.()A、AlarmB、MonitoringC、Autostart-upD、NoneoftheotherChoices答案：C159.The_____isusedtomeasurethevolumeofaliquidorgasthroughapipelinewithinanygivenperiodoftime.()A、flowmeterB、viseterC、micrometerD、feeler答案：A160.Oilmistdetectorsareusuallyusedonboardtodetectoilmistdensitywithin_____.()A、theenginecrankcaseB、theenginescavengeboxesC、draintanksD、fueltanks答案：A161._____isusedbythecontrollertoadjustthefuelrackstoreturntheenginespeedtorequired.()A、TherpmdeviationB、TheexhaustgastemperaturedeviationC、ThevibrationdeviationD、Thefuelrankspositiondeviation答案：A162.Connectedtothecontrolcabinet,thesystemcanthenreviewandstorethealarmhistoryandpro