轮机英语选择附有答案

轮机英语选择[复制]1.The_____engineisusedforalternatorsandsometimesformainpropulsionwithagearboxtoprovideapropellerofbetween90to120rpm.[单选题]*Afour-stroke(正确答案)Btwo-strokeCslowspeedDreversible2.Sincetheburningorcombustiontakesplacewithintheengineitself,theengineisknownas_____.[单选题]*Aafire-tubeboilerBaninternalcombustionengine(正确答案)CanexternalcombustionengineDaninternalcombustiongenerator3.Wherewillthethrustforcesfromthepropellerbetransferredtothroughathrustbearing?[单选题]*AThehulloftheship.(正确答案)BTheengine.CThegearbox.DThecrankshaft.4.Sincemostmedium-speeddieselenginesarenon-reversible,whatisusuallyusedtocaterforasternthrust?[单选题]*AareversinggearBacontrollablepitchpropeller(正确答案)CafixedpitchpropellerDaclutch5.____speedenginesoperateinspeedrangesfrom300to1000rpm.[单选题]*ASlowBMedium(正确答案)CHighDDeadslow6.Thethreelargestcategoriesofshipsarecontainerships,_____(forbulkgoodssuchasgrain,coal,ores,etc.)andtankers,whichagaincanbedividedintomorepreciselydefinedclassesandtypes.[单选题]*Abulkcarriers(正确答案)BgeneralcargoshipsCpassengershipsDreefers7.Increasingthecompressionratioofadieselenginewhilemaintainingthedesignedrateoffuelflowwillresultin_____.[单选题]*Aincreasedhorsepower(正确答案)BreducedefficiencyCincreasedheatlossDlowercylinderpressures8.Effectivehorsepoweristhepowerdevelopedbythe_____inthecylinder,butsomeofthisislostbyfrictionwithintheengine.[单选题]*AcrankshaftBcrankCconnectingrodDpiston(正确答案)9.Forthedieselengine,theoperationbetweentwofueloilinjectionsiscalleda_____,whichconsistsofafixedsequenceofevents.[单选题]*Acycle(正确答案)BperiodCrevolutionDcircle10.Thetermusedtoexpresstheignitionqualityofaparticularfuelis_____.[单选题]*Athecetanenumber(正确答案)BoctanenumberCignitionindexnumberDvolatilitypoint11.Apistoninafour-stroke/cycledieselenginemakesfourstrokesduringeach_____.[单选题]*AcrankshaftrevolutionBmechanicalcycleofoperation(正确答案)CperiodoftwocombustioncyclesDcycleoftwoevents12.Foranordinaryfour-strokeenginetheexhaustvalvesopen_____.[单选题]*AafterTDCBbeforeTDCCafterBDCDbeforeBDC(正确答案)13.Foranordinarymodernmarinefour-strokeenginetheinletvalvesopen_____.[单选题]*AafterTDCBbeforeTDC(正确答案)CafterBDCDbeforeBDC14.Fueloilbeginsinjectionintothecylinderofafour-stroke/cycledieselengineduringthe_____.[单选题]*AintakestrokeBexhauststrokeCpowerstrokeDcompressionstroke(正确答案)15.Duringwhichofthelistedpistonstrokeofafour-stroke/cycledieselengine,isthepistonmovingdownward?[单选题]*AIntakestroke(正确答案)BCompressionstrokeCExhauststrokeDPumpingstroke16.Fuelinjectionbeginsduringthecompressionstroke,beforethepistonreaches_____.[单选题]*AtopcenterBbottomcenterCTDC(正确答案)DBDC17.Whatiscommonlyusedtocreateturbulenceinadieselenginecombustionsystem?[单选题]*AShapeofthepistoncrowns(正确答案)BIncreasingthecompressionratiosCIncreasingthepistoncrownsDIncreasingtheturbochargergearratio18.____pistonshavelowinertiaandhighcoefficientofthermalexpansion.[单选题]*ACastironBCaststeelCForgedsteelDAluminum(正确答案)19.Connectingrodsinatrunk-pistondieselengineareusedtoconnectthe_____.[单选题]*AenginetothebedBrockerarmtothecamshaftCcrankshafttothegeartrainDpistontothecrankshaft(正确答案)20.Theuppersectionofapistoniscalledthe_____.[单选题]*AlandBskirtCcrown(正确答案)Dplate21.Thepurposeoftheflywheelofadieselengineisto_____.[单选题]*AcounterbalancethecrankthrowsonthecrankshaftBkeeptheenginerunningsmoothlybetweenpowerstroke(正确答案)Cprovideabelt-drivingsurfacefortheoperationofauxiliarymachineryDpreventtheenginefromover-speeding22.Combustiongasesformedinthecylinderofadieselenginearepreventedfromblowingpastthepistonby_____.[单选题]*AcylindervalvesBcompressionrings(正确答案)CpistonskirtsDoilrings23.Anacceptablemethodofmeasuringforthecorrectrotationalforceappliedtotheconnectingrodandmainbearingbolts,istousea_____.[单选题]*Atorquewrench(正确答案)BmonkeywrenchCpipewrenchDsluggingwrench24.Pistoncrownsareofthedishedtypetoprovide_____betweenthepistoncrownandthecylinderhead.[单选题]*AcombinedchamberBaturbochamberCapresschamberDacombustionchamber(正确答案)25.Anumberofcylinderlinersareenclosedinonecastironcasingtoforma_____.[单选题]*AcylindercoverBcylinderblock(正确答案)CcylinderframeDbed-plate26.Oneendofacylinderforamediumorhigh-speeddieselengineissealedbythepistonandrings,theotherendissealedbythe_____.[单选题]*AcrankcaseBcylinderhead(正确答案)CvalvecoverDengineframe27.Smallerenginescanbemademorerigidthanlargeonesandmaynothave_____.[单选题]*AconnectingrodsBcrankshaftCcrankcaseDthroughbolts(正确答案)28.Thepistonrodstuffingboxincorporatedinatwo-stroke/cycle,crossheaddieselengineservesto_____.[单选题]*AeliminatethenecessityforanoilscraperringBpreventsidethrustandcylinderscoringCpreventsludgeanddirtyoilfromenteringthecrankcase(正确答案)Dscrapeoilandcarbondepositsoffthecylinderwalls29.AtthetopoftheA-framesthereisastrongcastironframecalled_____.[单选题]*AcylinderlinerBcylindercoverCthegearboxDthescavengingbox(正确答案)30.Sealingbetweenthecrankcaseandscavengingairboxesisachievedbymeansofpistonrod_____locatedinthebottomofthescavengingairboxes.[单选题]*AsealingringBglandCbaffleDstuffingboxes(正确答案)31.Theexternalcircumferenceofapairofmainbearingshellsisslightlylargerthanthatoftheboreofthehousingwhichreceivesthem.Thedifferenceistermed“_____”.[单选题]*Anip(正确答案)BnapCgapDlip32.Mainbearingsformediumspeedenginescurrentlyinuseareofthe_____type.Similarbearingshellsareemployedforbottomendbearings.[单选题]*AballBintegrityCthinshell(正确答案)Dthickshell33.Ifafour-stroke/cycledieselengineisrunningat1550RPM,thespeedofthecamshaftwillbe_____.[单选题]*A525RPMB775RPM(正确答案)C1550RPMD1800RPM34.Heatforignitingthefueloilinthecylinderofadieselengineisgeneratedbythe_____.[单选题]*AelectronicignitionsystemBcompressionofairbythepiston(正确答案)CfrictioninthefuelinjectorDfueloilbearingsystem35.Whatisthespeedofthecrankshaftinafour-stroke/cycleenginewhenthecamshaftisturningat750rpm?[单选题]*A375RPMB500RPMC750RPMD1500RPM(正确答案)36.Fuelinjectedintoadieselengine’scylinderisignitedby_____.[单选题]*Atheheatcompressedfuel/airmixtureinthecylinder(正确答案)BthefueligniterCthefuelinjectorDthefuelpump37.Thequantityofoilinjectedintothecylindercanberegulated_____.[单选题]*Abyturningthepumpplunger(正确答案)BbyvarythefuelvalvespringforceCbynomeansbycontrollingthegovernorDbyenlargingordiminishingtheinjectionhole38.Thehighpressurefuelopensthefuelvalveandissprayedintothecylinderintinydropletsknownas_____.[单选题]*AinjectionBpenetrationCatomization(正确答案)Dcompression39._____controlsthefueloiltemperatureinordertoprovideoilatthecorrectviscosityforcombustion.[单选题]*ATheviscosityregulator(正确答案)BThetemperaturecontrollerCTheflowmeterDThepressureswitch40.The_____intheinjectorwillliftatapre-setpressurewhichensuresthatthefuelwillatomizeonceitentersthecylinder.[单选题]*Aneedlevalve(正确答案)BnozzlesCpistonDspring41.Whatisthetermgiventotheprocessofbreakingupfueloilintoveryfineparticlesforbettercombustion?[单选题]*ASettlingBStrainingCSprayingDAtomizing(正确答案)42.Thecleanedheatedoil,afterpassingthroughthecentrifuges,istobepumpedtoa_____.[单选题]*AsettlingtankBservicetank(正确答案)CballasttankDdraintank43.Fromthedailyservicetankthefuelispumpedtoaheaterby_____.[单选题]*AthetransferpumpBthehighpressurepumpCthelowpressurefuelpump(or“boosterpump”(正确答案)Dtheseparator44.Thefueloiltransferpumpsaregenerally_____pumps.[单选题]*Apositivedisplacementrotary(正确答案)BcentrifugalCvaneDcentripetal45.Onmostmoderndieselengines,themainandconnectingrodbearingsreceivetheirlubricatingoilby_____.[单选题]*AbanjofeedBsplashfeedCgravityfeedDpressurefeed(正确答案)46.Generallythefunctionoflubricationistoformafilmoflubricantbetweenanytwosurfacesthathaverelative_____,sothatsurfacesdon’tgettouchwitheachother.[单选题]*AgravityBmotion(正确答案)CratioDdensity47.Friction,enginewear,andlubeoilconsumptioninadieselenginearedirectlyrelatedtothe_____.[单选题]*AacidityoftheoilBpourpointoftheoilCflashpointoftheoilDviscosityoftheoil(正确答案)48.Cylinderlubricationoilforlowspeedmainpropulsiondieselenginesisadmittedtoeachcylinderduring_____.[单选题]*AthepowerstrokeBthecompressionstroke(正确答案)ClowloadoperationonlyDperiodsofstandby49.Lubeoilfiltersremovecontaminantsfromoilmoreefficientlyiftheoilbeingfilteredis_____.[单选题]*Aheatedtoreduceviscosity(正确答案)BcooledtoincreaseviscosityCpumpedrapidlythroughthefilterDpumpedthroughthefilterunderhighpressure50.Largecrossheadtypeenginegenerallyhastwolubricationsystems,afunctionperformedonlybycrankcaseoilsystemis_____.[单选题]*AlubricatingBcooling(正确答案)CcleaningDneutralizing51.Crankchamberoilsmusthavegoodlubricatingpropertiesandbeabletoresistruptureofthefilmseparatingthemovingpartsinorderto_____.[单选题]*AensureminimumlubricationBensureminimumfrictionlosses(正确答案)CensurepropercoolingDkeeptouchwitheachother52.Whichofthefollowingmethodsisnormallyusedtolubricatebearingsinasmallhigh-speeddieselengine?[单选题]*ASplashlubricationBPressurelubrication(正确答案)CSightfeedlubricatorsDMechanicallubricators53.Constantcoolingthevariouscomponentsofdieselenginehasanumberoffunctionsexceptfor_____.[单选题]*AgoodlubricationBlowthermalstressCgoodmechanicalpropertiesDacidcorrosion(正确答案)54.Inacommonoilcoolercirculatedbyseawater,theoilisata_____pressurethantheseawater.[单选题]*Alarger(正确答案)BsafetyClowerDbursting55.Theoutletfromanexpansiontankofaclosedfreshwatercoolingsystemshouldbepipedtothe_____.[单选题]*AcylinderheadwateroutletheaderBcylinderjacketinletmainCheatexchangerinletconnectionDjacketwaterpumpsuctionline(正确答案)56.AdieselenginecoolingwatersystemwithapHfactorof3.0indicatesaconditionof_____.[单选题]*AslightacidityBslightalkalinityCexcessivealkalinityDexcessiveacidity(正确答案)57.Inacommonseawatercoolingsystem,fromtheseasuctiononeofapairofseawatercirculatingpumpsprovidesseawaterwhichcirculatesthelubricatingoilcooler,thejacketwatercoolerandthepistonwatercoolerbefore_____.[单选题]*AcoolingBheatingCsuckingDdischargingoverboard(正确答案)58.Alarge,low-speed,mainpropulsiondieselengineusesseawatertodirectlycoolthe_____.[单选题]*AcylinderheadsBexhaustvalvesCscavengingair(正确答案)Dinjectors59.Onoppositeendsofasingleshaftofaturboblowerareagasdriven_____andanaircompressor,whicharesealedeachother.[单选题]*AchargeairreceiverBscavengingairbeltCturbine(正确答案)Daircooler60.Intakeairflowfromadieselengineturbochargerisdirectlyproportionaltoengine_____.[单选题]*AexhaustgaspressureBexhaustgastemperatureCspeedDload(正确答案)61.Dieselenginemufflersaccomplishnoisereductionby_____.[单选题]*Areducingexhaustgasvelocity(正确答案)BincreasingthefrequencyofgasvibrationCtheuseoflongheadpipesDtheuseofzincelectrodes62.Comparedtoanaturallyaspirateddieselengine,asuperchargeddieselenginehas_____.[单选题]*Aacylinderairchargeofhigherpressure(正确答案)BincreasedpumpinglossesClessvalveoverlapDreducedblow-by63.Onecharacteristicofapulsetypeturbo-chargingsystemis_____.[单选题]*AhighaverageexhaustmanifoldpressureBgreatlyfluctuatinginletmanifoldpressureCconstantexhaustmanifoldpressureDmultipleexhaustpipestotheturbocharger(正确答案)64.Inanaturallyaspirateddieselengine,thevolumeofairintakeisdirectlyrelatedtoengine_____.[单选题]*AcompressionratioBvalvesize(正确答案)CfuelpressureDcylinderclearancevolume65.Eachcylinderhasonestartingvalvewhichisusuallyopenedbyairpressureandclosedby_____.[单选题]*AnutsandboltsBnewjointsCspringforce(正确答案)Dsealingrings66.Thestartingairsystemofanengineonboardusuallyhasinterlocksinorderto_____.[单选题]*AensureasuccessfulshuttingdownatemergencyconditionsBensureasuccessfulstartingatemergencyconditionsCpreventtheenginefromstartingatsomeabnormalconditions(正确答案)Dpreventtheenginefromstartingatemergencyconditions67.Vesselshavingmainenginesarrangedforairstartingaretobeprovidewithatleast_____.[单选题]*AoneautomaticdrainservingbothcontainersBtwoairstartingcontainersofapproximatelyequalsize(正确答案)ConecontrolaircontainerandonestartingaircontainerDoneadditionalmeansofstartingthemainengine68.Openingofthecylinder_____willadmitcompressedairintothecylinder.[单选题]*AsafetyvalveBindicatorcockCblow-downvalveDstartvalve(正确答案)69.Anelectricallydrivenautomaticallyoperatingauxiliaryblowerisprovidedforslowspeedand_____ofalowspeeddieselengine.[单选题]*Amanoeuvringoperations(正确答案)BbadcombustionCcoolingDmooringtrial70.Dieselengineexhaustgastemperaturescanbeusedtodetermineindividualcylinder_____.[单选题]*Aperformance(正确答案)BhorsepoweroutputCfuelconsumptionDscavengeeffect71.Ifthespeedofaturbochargeddieselengineismaintainedconstantastheloadontheengineisincreased,thespeedoftheturbochargerwill_____.[单选题]*AdecreaseuntiltheenginespeedincreasesBincrease(正确答案)CdecreaseDremainunchanged72.Ifthemaximumcylinderpressuresareoutofbalancetheyshouldbeadjustedby_____.[单选题]*AchangingthefuelBadjustingtheinjectorCcleaningtheairfilterDre-timingthefuelpumps(正确答案)73.Thepurposeofanoilmistdetectorinamainpropulsiondieselengineistowarnof_____.[单选题]*Aexcessivemistdensityinthecrankcases(正确答案)BexcessivelyhighcrankcasevacuumCexcessivelyhighbearingtemperatureDexcessivecarbonbuildupinthelubeoil74._____deviceisprovidedtopreventstartingairfrombeingadmittedtothecylinderbeforethereversingiscompleted.[单选题]*AAnautomaticBAtransmissionCAself-regulatingDAninterlocking(正确答案)75.Electricallyoperatedsafetydevicesonauxiliarydieselenginesfunctiontostoptheengineby_____.[单选题]*AincreasingthevolumeofintakeairBshuttingoffthefuelsupply(正确答案)CincreasingtheenginebackpressureDover-speedingtheengine76.Aircocks,usuallypositionedatthe_____inacirculatingsystem,isusedtogetridoftheairinthesystem.[单选题]*AbendingjointBexpansiontankCweldDthehighestpoint(正确答案)77.Adieselengineusinglubeoilwithtoohighaviscositywillexhibit_____.[单选题]*Aincreasedstartingdifficultyincoldweather(正确答案)BincreasedoilconsumptionCthickeningathigheroperatingtemperaturesDminimalfrictionlosses78.Foracontinuousoperationdieselengine,aduplexfilterunitwouldbethebestarrangementbecause_____.[单选题]*Achangingfilterelementswouldnotinterruptengineoperation(正确答案)BfilteringoccurstwiceineachpassofoilthroughthesystemCcloggingwillnotoccurDdroppingpressureishalfofthatthroughasinglefilterunit79.Apracticalwayofcheckingforexcessivefuelinjectioninonecylinderofanoperatingdieselengineisto_____.[单选题]*AfeelthehighpressurefuellineBcheckthecylinderexhaustsforwhitesmokefrequentlyCcheckthecylinderexhausttemperature(正确答案)Disolateeachcylinderandinspecttheinjector80.Fueloilhavingalowcetaneratingcouldresultin_____.[单选题]*AimprovedcoldweatherstartingBexcessivefueloilconsumption(正确答案)CreducedignitionlagDsmootherengineoperation81.Acontrollablepitchpropelleronadieseldrivenvesseleliminatestheneedfor_____.[单选题]*AfrictionclutchesBdisconnectclutchesCreversinggears(正确答案)Dreductiongears82.With_____,theengineneednottobealignedwithreductiongearsorpropellershaft.[单选题]*AdieselenginepropulsionBdieselelectricpropulsion(正确答案)CsteamenginepropulsionDgasturbinepropulsion163.Inmotorship,_____isoftenusedtorecoversomeoftheheatcarriedintheexhaustgasesfromthemainengine.[单选题]*AandieseloilheaterBawasteheatboiler(正确答案)CafreshwatergeneratorDAlloftheotherChoices164.Marineboilersareusedforproducingsteamwhichmaybeusedforthefollowingexcept_____.[单选题]*AdrivingauxiliarymachineryBdrivingthemainenginesCheatingheavyoilDproducingdrinkingwater(正确答案)165.Theliftingpressureof_____issetinthepresenceofasurveyor,itislockedandcannotbechanged.[单选题]*AfuelvalvesofmainengineBinjectorpumpofmainengineCsafetyvalvesofmarineboiler(正确答案)Dsafetyvalvesofareciprocatingpump166.Thefunctionofasafetyvalveonamarineboileristopreventthepressureintheboilerfromrisingabove_____.[单选题]*AdesigntestpressureBmaximumallowableworkingpressure(正确答案)CthepressureusedintheaccumulationtestDthehydrostatictestpressure167.Inaverticalmarineboiler,_____isfittedinthecombustionchamber,onthefloorandsidesofthefurnace.[单选题]*AuptakeBsmoketubeCrefractorymaterial(正确答案)Daccessdoor168.Afire-tubeboilerincludesthefollowingcomponentsexcept_____.[单选题]*AuptakesBdowncomers(正确答案)CsmokeboxesDfurnaces169.Afailureofanycomponentofaflamesafeguardcontrolforanauxiliaryboilerwillresultin_____.[单选题]*AafurnaceexplosionBautomaticburnershutdown(正确答案)CuncontrolledfiringDautomaticrestart170.Impuritiesfromtheboilerwatersurfacecanberemovedthroughthe_____.[单选题]*AsafetyvalveBblowdownvalveCscumvalve(正确答案)Dfeedcheckvalve171.Oneofthepurposesofchemicallytreatingboilerwateristo_____.[单选题]*AReduceblowdownfrequencyBreducescaleformation(正确答案)CeliminatewatersidecleaningDconstantlydecreasealkalinity172.Whichofthefollowingconditionswouldcause“panting”inasteamingauxiliaryboiler?[单选题]*ALowwaterlevel.BFaultyflamescanner.CFlamefailure.DInsufficientcombustionair.(正确答案)173.Whitesmokefromaboilermayindicate_____.[单选题]*Aafracturedtube(正确答案)BlowfueloiltemperatureClowfueloilpressureDinsufficientcombustionair174.Amono-pumpisasingle-screwpump.Thatmeansitconsistsof_____rotor(s).[单选题]*Aone(正确答案)BtwoCthreeDfour175.Thedischargeflowofareciprocatingpumpis_____.[单选题]*AsteadyBinpulsation(正确答案)CcontinuousDlarge176.WhichofthelistedpumpsisNOTapositivedisplacementpump?[单选题]*ACentrifugal(正确答案)BReciprocatingCGearDRotary177.Thepumpsemployedonboardshipcanbedividedintotwomaincategories,i.e._____pumpsandcentrifugalpumps.[单选题]*AgearBnon-positivedisplacementCpositivedisplacement(正确答案)Drotary178.____isnottheadvantageofself-primingreciprocatingpump.[单选题]*ASimplestructure(正确答案)BProducingrequireddischargepressureCDealingwithalargeamountofvaporDMakingaseal179.Tooperateacentrifugalfirepumpatreducedcapacity,youshould_____.[单选题]*AreadjustthereliefvalveBthrottlethesuctionlineCthrottlethedischargevalve(正确答案)Dopentheprimingline180.Ifyouwereoperatingacentrifugalwaterservicepumpwithwornwearingrings,the_____.[单选题]*ApumpwouldbeverynoisyBpumpwouldvibrateexcessivelyCpumpwoulddevelopinsufficientflow(正确答案)Dstuffingboxwouldleakexcessively181.Over-greasingofballbearingsinstalledonpumpswillresultin_____.[单选题]*AsmootherpumpoperationBoverheatingofthebearing(正确答案)CreducedcorrosioninthebearingDincreasedpumpcapacity182.WhichofthefollowingmodesofheattransferdoesNOTrequireanyphysicalcontactbetweenawarmerandacoolersubstance?[单选题]*ARadiation(正确答案)BConductionCNaturalconvectionDContactdirectly183.Refrigerantenteringthecompressorofarefrigerationsystemshouldbeinwhichofthefollowingconditions?[单选题]*ASub-cooledliquidBSub-cooledvaporCSuperheatedvapor(正确答案)DLiquid184.Thetemperatureofarefrigerantgasisthehighest_____.[单选题]*Aatthecompressordischarge(正确答案)BatthecompressorsuctionCintheexpansionvalveDinthereceiver185.Thelatentheatofevaporationisdissipatedinthe_____inacompressionrefrigerationsystem.[单选题]*AevaporatorBcondenser(正确答案)CexpansionvalveDcompressor186.Thecompressorsuctionlineconveystherefrigerantvaporfrom_____to_____.[单选题]*Acondenser/evaporatorBevaporator/compressor(正确答案)Ccompressor/condenserDNoneoftheotherChoices187.Sub-coolingincreasesthe_____oftherefrigerationcycle.[单选题]*AcapacityBrefrigerationeffect(正确答案)CmassflowrateDvolumeflowrate188.Thedevice,whichisinstalledinthecompressorsuctionlinetopreventliquidfromenteringthecompressorwhenhotgasdefrosting,iscalleda_____.[单选题]*Are-vaporator(正确答案)BdehydratorCreceiverDsolenoid189._____maybedefinedastheprocessofaddingheattoanenclosedspacetomaintainitstemperatureaboveambient.[单选题]*AHeating(正确答案)BVentilationCDehumidifyDRefrigeration190._____isthecirculationandrefreshingoftheairinaspacewithoutnecessarilyachangeoftemperature.[单选题]*ARefrigerationBAirconditioningCVentilation(正确答案)DHeating191.Whenaircoolingisinuseitisgoodpracticetokeepallportholes,windowsanddoors_____.[单选题]*Ashut(正确答案)BfullyopenCopenDsemi-opened192.Thequantityofcooledairdeliveredbyanairconditioningunitshould_____thesumofthequantityofairre-circulatedtotheunitandthequantitymechanicallyexhausted.[单选题]*AbehigherthanBbelowerthanCbeequalto(正确答案)Dexceed193.Theprincipleofseparationbywhichallcommerciallyavailableoilywaterseparatorsfunctionis_____differentialbetweenoilandwater.[单选题]*AthetemperatureBtheviscosityCthegravity(正确答案)Dthesize194.Oilywaterseparatorsareusedtoensurethatshipsdon’tdischargeoilwhenpumpingout_____.[单选题]*AballastwaterBboilerwaterCbilgewater(正确答案)Dsewagewater195.Inanoilywaterseparatortheoilwilltravel_____totheoilcollectingspaces.[单选题]*Aupwards(正确答案)BdownwardsCoutwardsDforwards196.Accordingtooneoftheannexesof_____,waterthathastobedischargedshouldcontainlessthan15ppmofoil.[单选题]*AISPSBSTCWCILODMARPOL(正确答案)197.Becausetheflowrateofsupplywaterpumpistoolarge,oilywaterseparatordoesnotworkwell.Whichofthefollowingisnotthereason?[单选题]*Athemonitoringequipmentisoutoforder(正确答案)BseparatingeffectbecomesbadCinnerwalliscontaminatedDseparatingeffectbecomesbadandinnerwalliscontaminated198.Theoilsludgeisburntinthe_____onboard.I’llshowyoutheashes.[单选题]*AboilerBmainengineCauxiliaryengineDincinerator(正确答案)199.Whenanincineratorgoesoutsuddenly,the_____supplyshouldbeshutoffquickly.[单选题]*AairBfuelCsludgeDfuelandsludge(正确答案)200.Disinfectorusedinthesewagebiologicaltreatmentplantusuallyis_____.[单选题]*AchlorinewaterBozoneChypo-calciumchloride(正确答案)Dcalciumoxide201.Biologicalsewagewatertreatmentplantworksonthe_____.[单选题]*AheatingprocessBsettlingprocessCaerationprocess(正确答案)Dcentrifugingprocess202.Thehighoildensitywillpositiontheinterface_____thanwillalowdensity.[单选题]*AfartherawaythewateroutletBfartherawaythebowlperipheryCclosertothebowlperiphery(正确答案)Dclosertothebowlcenter203.Forapurifier,changingtoagravitydiscwithlargerholediameterwillmovetheinterfacetowardsthe_____.[单选题]*Abowlperiphery(正确答案)BbowlcenterCuppersurfaceDlowersurface204.Whenseparatinglubeoilinoilseparator,theoptimalseparatingquantityis_____oftheratedquantityonnameplate.[单选题]*A100%B1月2日C1月5日D1月3日(正确答案)205.Theunitsmustincorporateanaudio-visualalarmsystemwhichcomeintooperationwhenanyrunningconditionis_____.[单选题]*AchangedBingoodCoutoforder(正确答案)Dundercontrol206.Ifdieselfuelwasdischargingfromthewastewateroutletofadisktypecentrifugalpurifieroperatingasaseparatoryoushouldtryto_____firstly.[单选题]*Are-primethepurifier(正确答案)BremovethedischargeringCslowthepurifiertoitsproperspeedDputinanadditionaldischargering207.Ifthebowlspeedoftheoilpurifierisalwayslowerthantheratedspeed,whichcauseisincorrect?[单选题]*AThemotorisoutoforder.BThebrakeisn’treleased.CThefrictionpadsareslippery.DThethroughputistoohigh.(正确答案)208._____cancauseoilflowfromwateroutletofaseparator.[单选题]*AOilinletvalveopeningtooquickly(正确答案)BOiltemperaturelittlehigherthannormalCDiameterofgravitydisctoosmallDViscosityofoillittlelowerthannormal209._____istheproductionofpurewaterfromseawaterbyevaporationandre-condensing.[单选题]*AEvaporationBCirculationCCondensationDDistillation(正确答案)210._____areusedtolimitthepressureinanyparticularportionandmainlycontrolthepressureafterthevalve.[单选题]*AReliefvalvesBCheckvalvesCSafetyvalvesDReducingvalve(正确答案)211.Tocloseabutterflyvalve,itisonlynecessarytoturnthehandle_____.[单选题]*AOnethirdofaturnBHalfofaturnCAquarterofaturn(正确答案)DAturn212.Amongthebasiccategoriesofequipment,whichofthefollowingareusedtoconvertmechanicalintohydraulicenergy?[单选题]*AThehydraulicpumps(正确答案)BValvesCHydrauliccylindersDHydraulicmotors213.Inageneralcargocrane,_____isfittedtoliftthecargoload.[单选题]*AtheslewingmotorBtheluffingmotorCthehoistingmotor(正确答案)DNoneoftheotherChoices214._____areusedforcargohandling.[单选题]*ACranes(正确答案)BMooringwinchesCWindlassesDForeman215._____isnotacomponentofawindlass.[单选题]*AAcablelifterBAsootblower(正确答案)CAmooringdrumDAwarpend216.Oncetheanchorisheavedupandfirmlyseated,_____isusedtolockthechaininplace.[单选题]*AwindlassBachainstopper(正确答案)CahydraulicmotorDcapstan217.Therequiredrudderangleistransmitted_____fromthesteeringwheelatthebridgetothetelemotoratthesteeringgear.[单选题]*AmanuallyBbycompressedairCbyfueloilDhydraulicallyorelectrically(正确答案)218.Whichofthefollowingcanbeusedintransmissionsystemusually?[单选题]*AHydraulicoil(正确答案)BAnimaloilCLightoilDFueloil280.Anelectr