輪機英語（輔機）考試復習題庫100題（含答案）

PAGEPAGE1輪機英語（輔機）考試復習題庫100題（含答案）一、單選題1.Tothoroughlypumpoutthebilgesusingahorizontallymountedcentrifugalpump,the.A、pumpmustalwaysbeprimedB、volutemustimpartaradialandrotarymotionofthewaterC、suctionsideconnectionmustguidetheliquidtothelanternringsD、stuffingboxshouldnotbeallowedanywaterleakage答案：A2.Distilledwaterfromanevaporatormaybedischargedintoapotablewatertank.A、throughadetachablehoseconnectionB、afterpassingthroughanactivatedcharcoalfilterC、afterchemicalanalysisshowsitisfitforconsumptionD、throughasolenoidoperatedthree-wayvalve答案：D3.Inanairconditioningsystem,lowheadpressureassociatedwithareciprocatingpressorcanbetheresultof

.A、brokenvalvespringsB、tightdrivebeltsC、highlinevoltageD、airinthesystem答案：A4.Inthegovernorhydraulicsystem,whichofthefollowingrestoresthespeedtoitsoriginaldesiredvalue?A、modificationB、pensationC、makingupD、altering答案：B5.Steeringgearscanbearrangedwithhydrauliccontrolequipmentknownasa‘’orwithelectricalcontrolequipment.A、telemeterB、tele-manometerC、telemotorD、barometer答案：C6.Whenstarted,apleteoilywaterseparatingunitisfirstfilled.Theoilywatermixtureisthenpumpedthroughtheinletpipeintothecoarseseparatingpartment.A、withdirtywaterB、withcleanwaterC、byoilywaterD、bymixedwater答案：B7.Ofthefollowing,whichonedoesnotbelongtotherotarypump?A、VanepumpB、GearpumpC、ScrewpumpD、Piston答案：D8.Theclosedhydraulicsystemconsistsofanaxialpistonpumpwithvariableoutputandamutuallyconnectedthroughoilpressurelines.A、controlcylinderB、oilpipeC、oilpumpD、hydraulicmotor答案：D9.Whichofthefollowingstatementsconcerningfire-tubeboilersiscorrect?A、bustiongasesflowthroughthetubes.B、Flamesimpingeonthetubes.C、bustionoccursinthetubes.D、Waterflowsthroughthetubes.答案：A10.Apumpisthatwherethevolumeofthepumpchamberisalternatelyincreasedtodrawtheliquidinandthendecreasedtoforcetheliquidout.A、injectorB、positivedisplacementC、centrifugalD、Centripetal答案：B11.Whatharmwillbebroughtbycondensationformedwithintheplasticfilmofanairconditioningplant?①Makingtheinsulationvapoursealwetandineffective②causingdripsanddamppatchesonceilingsA、①B、②C、both①and②D、neither①nor②答案：C12.Thelowpressuresideofarefrigerationsystemisconsideredtoexistfromthe.A、expansionvalvetothepressorB、receivertotheexpansioncoilC、expansionvalvetotheevaporatorD、condensertotheexpansionvalve答案：A13.Pumpefficiencymaybelostasaresultof.A、airenteringthepumpthroughapinholeB、leakinthedischargemanifoldorleakinagasketonthesuctionsideofthepumpC、thesuctionvalveinthewideopenpositionD、thepumpbeinginstalledtooclosetothesuctiontank答案：B14.Itispossibletomountadoublesuctioncentrifugalpumpimpellerwiththevanesfacinginthewrongdirection.Thiswouldcausethepump.A、headcapacitytoimproveB、dischargetobereversedC、efficiencytodecreaseD、slippagetodecrease答案：C15.Theboilerwateralkalinityinacoil-typeauxiliaryboilershouldbemaintainedatthepHremendedbytheboilermanufacturerto.A、precipitatesilicafromsolutionB、reducecorrosionintheheatingcoilC、preventclogginganderosioninthecoilD、maintainzerowaterhardness答案：B16.Thepaneloffreshwatergeneratorsalinityindicatordoesnotinclude.A、powerswitchB、testbuttonC、indicatedsaltcontentD、indicatedwatertemperature答案：D17.Failureoftheburnerflameinanautomaticauxiliaryboilerwouldprobablybearesultof.A、waterinthefueloilB、brokenhightensionleadsC、incorrectelectrodesettingD、fullfuelpressureatthenozzle答案：A18.Anexhaustfanismonlyinstalledtoavoidexcessiveairpressureinthespace.A、PlusB、negativeC、minusD、positive答案：D19.Ifthecapacityofacentrifugalpumpdecreasesgraduallyoveralongperiodoftime,youshouldreplacethe.A、packingglandB、mechanicalsealC、lanternringsD、wearingrings答案：D20.Intheproductionoffreshwaterfromseawaterthroughaprocessofheatingandcooling,thecoolingphaseofproductionisusuallycalled.A、EvaporationB、distillationC、dehydrationD、condensation答案：D21.Inageneralcargocrane,isfittedtoliftthecargoload.A、theslewingmotorB、theluffingmotorC、thehoistingmotorD、thefanmotor答案：C22.Oncetheanchorisheavedupandfirmlyseated,isusedtolockthechaininplace.A、windlassB、achainstopperC、ahydraulicmotorD、capstan答案：B23.Whichofthefollowingdevicesismontobothmechanicalandhydraulicgovernors?A、Directlinkagebetweentheball-headandfuelrackB、servomotorC、pensatingdeviceD、Flyweights答案：D24.Whichofthelistedcontaminantswillbesatisfactorilyremovedfromfueloilbycentrifuging?A、SludgeB、DieselfuelC、LubeoilD、Gasoline答案：A25.Whenavacuumboilingevaporatorworks,thehotjacketwaterwillpassoverthetubestackand____theseawaterpassingthroughthetubes.A、disposeB、dissolveC、heatD、Dissipates答案：C26.ThespeedofaradialpistonhydraulicMOTORiscontrolledbyvaryingthe.A、amountofcylinderblockoffsetwithrespecttotherotorB、fluidflowratedischargedtothemotorC、lengthofthemotorpistonstrokeonthepowercycleD、pintledischargeratetothesuctionsideofthepump答案：B27.Acentrifugalfueloilpurifiershouldbeshutdownif.A、moresealingwaterisneededB、thecoverclampneedstighteningC、thepurifierhasabadvibrationwhenstartedD、waterisdischargedfromtheoverflowline答案：C28.Large-borepipesorarefittedbetweenthesteamandwaterdrumtoensuregoodnaturalcirculationofthewater.A、down-ersB、waterwalltubesC、generatingtubesD、screentubes答案：A29.Ifthefeedwaterpumpofanautomaticboilerstartsfrequently,thereasonmayNOTbe.A、thesteamdemandislowB、theblowdownvalveisleakyC、therearesomeleakygeneratingtubesD、thesteamdemandishigh答案：A30.Airvalvesintheairpressoraresubjecttowear,soallvalvespartsshouldbe.A、cleanedwithwirebrushB、carefullyandthoroughlycleanedwithacleaningfluidC、checkedbyusingasmallpieceofwoodD、removed,dismantledandinspectedatfixedintervals答案：D31.Awiseprecautionforanengineertotakeistogothroughacmodationandpublicroomsperiodicallyrecording.A、drybulbtemperatureB、wetbulbtemperatureC、wetanddrybulbtemperaturesD、airhumidity答案：C32.Whenthesteeringwheelisturned,oilisdirectedtothesteeringgearramsby.A、modulatingtheoilflowwiththesix-wayvalveB、movingtheautomaticpressuredifferentialvalveC、movingthereceivingtelemotorwhichregulatesthetwo-wayvalveD、varyingtheeccentricityofafloatingringorangleofatiltingbox答案：D33.Theoperatingmediumfordeckcranemotorsmaybe.A、pressedairB、thefueloilC、steamD、hydraulicorelectric答案：D34.Blacksmokeingfromaboilercanbecausedby.A、lowwaterlevelB、highwaterlevelC、excessivelyhighfuelpressureD、lowoiltemperature答案：D35.Thelatentheatofevaporationisdissipatedintheinapressionrefrigerationsystem.A、evaporatorB、condenserC、expansionvalveD、pressor答案：B36.Inaverticalmarineboiler,isfittedinthebustionchamber,onthefloorandsidesofthefurnace.A、uptakeB、smoketubeC、refractorymaterialD、accessdoor答案：C37.Boilerwaterhardnessisincreasedby.A、zeroalkalinityinthewaterB、scaleformingsaltsinthefeedwaterC、dissolvedgasesinthewaterD、improperoperationoftheDCheater答案：B38.Theprocessofremovingmoisturefromairisknownas.A、humidificationB、dehumidificationC、vaporizationD、evaporation答案：B39.Whichofthefollowingcannotcausetheboilerignitionflamefailure?A、ThesolenoidvalveismalfunctioningB、TheburnercontroldoesnotworkwellC、TheoilnozzleisblockedD、Thepurgesteamvalveisopen答案：D40.Inanemergencysituation,forexampleintheeventofdamagetoafreshwatercoolerorgenerator,theseawaterpumpscanbeusedtosupplytothefreshwatercoolingsystem,merelybyremovingtheblind-flanges.A、seawaterB、freshwaterC、coolingoilD、anyoftheothers答案：A41.Ifthefeedpumpforanauxiliaryboilerfailstodeliverthefeedwatertotheboiler,thecausemaybe.A、highsteampressureintheboilerB、abnormallyhighfeed-watertemperatureC、abnormallyhighboilerwatertemperatureD、steamdemandexceedingfeedpumpcapacity答案：B42.Asforoilseparator,contributestopoorseparationefficiencyandcarriesoverofwaterintothecleanoiloutlet.A、AtoobiggravitydiscB、AtoosmallgravitydiscC、ThehighoiltemperatureD、Thehighspeedmotor答案：B43.Theflamesafeguardcontrolsystemofalargeautomaticauxiliaryboilerwillprovidefuelshutoffinthecaseofhigh.A、waterB、voltageC、fuelpressureD、steampressure答案：D44.Theinthesteeringgearmovetheruddertotherequiredangle.A、controlequipmentB、powerunitC、transmissionmechanismsD、fittingsandpipeline答案：C45.Whichofthelistedconditionscanleadtocavitationinacentrifugalpump?A、Vaporpocketsformedinthesuctionflowstream.B、Roughcasingvolutesurfaces.C、Wornwearingrings.D、Heavyfluidintheflowstream.答案：A46.Aliquidisbeingtransferredbyacentrifugalpump.Astheliquidpassesthroughthevolute,itsvelocitydecreasesand.A、itspressureincreasesB、itspressuredecreasesC、thepotentialenergydecreasesD、thekineticenergyincreases答案：A47.Thewaterinanauxiliaryboilershouldbechemicallytesteddailyforalkalinityand.A、soaphardnessB、nitrogencontentC、chloridecontentD、dissolvedCO2答案：C48.isnottheadvantageofself-primingreciprocatingpump.A、SimplestructureB、ProducingrequireddischargepressureC、DealingwithalargeamountofvaporD、Makingaseal答案：A49.Thedewpointisreachedwhenthewetbulbtemperatureis.A、equaltothedrybulbtemperatureB、twicethedrybulbtemperatureC、lessthanthedrybulbtemperatureD、50°Cabovethedrybulbtemperature答案：A50.Pittinginthesuctionareasofacentrifugalpumpbronzeimpellerisusuallycausedby.A、cavitationB、electrolysis(電解)C、abrasionD、corrosion答案：A51.Ifaradialpistonhydraulicpumpfailstodeliverratedfluidvolume,thecausecanbe.A、contaminatedfluidB、pittedthrustringsC、wornpintlebearingsD、obstructedsuctionspassage答案：D52.Theusualsymptomsofcavitationinacentrifugalpumpis.A、noiseandvibrationB、anincreaseindischargepressureC、anincreaseinsuctionpressureD、liftingofthereliefvalve答案：A53.Whichproblemcanoccurifthebrakebandliningofawildcatbrakebeesexcessivelyworn?A、Thedrivingenginewillover-speed.B、Theanchorwillimmediatelydrop.C、Theclutchwilloverheat.D、Thebrake'seffectivenesswillbereduced.答案：D54.Thepurposeofthesafetyreliefvalvesinstalledonanauxiliaryboileristo.A、relieveexcessfueloilpressureduringthe“off”firecycleB、admitwatertothedrypipeC、throttletheforceddraftfenoutputforproperbustionD、reduceexcesssteampressureintheboiler答案：D55.Afluidcoilwilllargequantitiesofheatwhenitchangesstatefromaliquidtoavapor.A、releaseB、absorbC、developD、regenerate答案：B56.Acoil-typeautomaticallyfiredauxiliaryboileristobelaidupwetforanindefiniteperiod.Theboilerwatershouldbetreatedtoensurethat.A、themanufacturer’sremendedPHismaintainedB、thereisnoexcessofoxygenscavengingchemicalsC、sludgeformationcannotoccurinthesteamseparatorD、watersideblow-downwillnotberequired答案：A57.Checkvalveisn'tusedtocontrol.A、directionofoilflowB、backpressureofreturnoilC、bypassoffilterD、highpressureoverflow答案：D58.Thefulltorqueelectricbrakeonanelectriccargowinchfunctionsto.A、actasabackupbrakeintheeventthemechanicalbrakeshouldfailB、automaticallyholdtheloadassoonascurrenttothemachineisshutoffC、automaticallygoverntheloweringspeedoftheloadD、automaticallygovernthehoistingspeedoftheload答案：B59.Ifyouwereoperatingacentrifugalwaterservicepumpwithwornwearingrings,the.A、pumpwouldbeverynoisyB、pumpwouldvibrateexcessivelyC、pumpwoulddevelopinsufficientflowD、stuffingboxwouldleakexcessively答案：C60.Externalandinternalleakageinhydraulicsystemsmaybecausedby.

①unusualvibration②abnormalpressure③excessivewornpartsA、①B、②C、③D、①②③答案：D61.Thequantityofcooledairdeliveredbyanairconditioningunitshouldsumofquantityofairrecirculatedtotheunitandthequantitymechanicallyexhausted.A、behigherthanB、belowerthanC、beequaltoD、exceed答案：C62.Thevolumesofthepumpchambersareincreasedanddecreasedbythereciprocatingmotionof.A、thevaneB、theimpellerC、thepistonD、thegear答案：C63.WhichofthefollowingfunctionsisNOToneofthefunctionsofairconditioner?A、RefreshingtheairB、WakingupC、AdjustingtheairhumidityD、Adjustingtheairtemperature答案：B64.Dualelectro-hydraulicsteeringunitsusuallyoperate.A、withbothpumpsonlineatthesametimeB、withonepumponstandbyC、withthefollow-upgeardisconnectedD、onlywhentherudderismovedamidships答案：B65.withvariousarrangementsofbarrelsaretheusualmooringequipmentusedonboardships.A、CranesB、WinchesC、CapstanD、Windlass答案：B66.Inwhichofthelistedponentsischemicalenergyconvertedtothermalenergywithregardstoboileroperation?A、furnaceB、super-heaterC、steamdrumD、conomizer答案：A67.areusedsacrificiallytoprotectheatexchangerheaders,oreventheship'shullitself.A、CopperrodsB、ZincrodsC、CarbonrodsD、Magnetrods答案：B68.Rudderpositionisshownonthebridgebythe.A、rudderangleindicatorB、follow-upgearC、telemotorpositionD、rapsonslideindicator答案：A69.Anincineratorauxiliaryburnercannotbeignited.ItisNOTcausedby.A、carbondepositsontheelectrodesB、defectiveatomizerC、lowoilpressureD、toomuchwaterintheoilsludge答案：D70.Accordingtowhatisthecargohandlingequipmentrated?A、thesafeworkingloadtobeliftedB、thecapacityofthedrivemotorC、outputofthewinchD、cargohandlingwires答案：A71.Whendistillingseawater,thecoolingwaterdischargingfromthedistillerisfedbacktoevaporatorasfeedwater.A、todecreasescaleformationB、forbettercoolingeffectC、formoreeconomicalpurposeD、toraisevacuum答案：C72.Thetubeinaboilershouldbeblindediffound____.A、scaledB、informedC、leakyD、Deformed答案：C73.AstoFreonrefrigerationsystem,whentheheatloadbeginstoincrease,theneedlevalveofanexpansionvalvewill.A、moveinanopeningdirectionB、moveinaclosingdirectionC、eitheropenorcloseD、notmoveatall答案：A74.Tocloseabutterflyvalve,itisonlynecessarytoturnthehandle.A、aturnB、halfofaturnC、one-thirdofaturnD、aquarterofaturn答案：D75.Tomaintainthedesigndischargepressureofacentrifugalpump,theclearancebetweenthe.A、impellerandlanternringiscriticalB、impellerandcasingwearingringsiscriticalC、packingboxandpackingglandiscriticalD、glandsealandpackingglandiscritical答案：B76.Mostdeckcranesusecoolers.A、fresh-waterB、sea-waterC、forcedconvectionairD、naturalconvectionair答案：C77.Whenburningdieselfuelinanoil-firedboiler,forsafetyreasonswhatshouldbekeptinmind?A、Uselargeburnertipwheneverpossible.B、Fuelsupplyshouldnotbecutoffimmediately.C、.Immediatelyshutofffuelandventfurnaceifthereisanignitionfailure.D、Blowmoreairintothefurnacetoassistburning.答案：C78.Whenitisnecessarytoopenarefrigerationsystemforrepairsandthesystemwillbeopenformorethanafewminutes,theopenendsofthesystemshouldbe.A、dehydratedB、purgedC、pluggedD、evacuated答案：C79.Whichofthefollowingconditionswouldcause“panting”inasteamingauxiliaryboiler?A、InsufficientbustionairB、Lowwater1evelC、FlamefailureD、Faultyflamescanner答案：A80.Whenaircoolingisinuse,itisgoodpracticetokeepallportholes,windowsanddoors.A、shutB、fullyopenC、openD、semi-opened答案：A81.Tooperateacentrifugalfirepumpatreducedcapacity,youshould.A、readjustthereliefvalveB、throttlethesuctionlineC、throttlethedischargevalveD、opentheprimingline答案：C82.After-coolersareusedwithairpressorsto.A、reducethetemperatureofpressedairB、decreasethedensityofpressedairC、dampenpressurepulsesinthedischargeairD、ensurepleteexpansionofthepressedair答案：A83.Sludgemayforminthecrankcaseofanairconditioningpressorasaresultof.A、bubblingrefrigerantB、overheatingandoxidationC、loweredoperatingtemperaturesD、reducingthecloudorflocpoint答案：B84.Whichofthefollowingwouldnotbeburntinanincinerator(notratifiedbyIMO)onboard?A、wasteoilB、wasteclothesC、oilragsD、PVCgarbage答案：D85.Asforanoil-firedboilerifatanormalsteamingconditionandwatergoesoutofsightingaugeglassestheactionyoushouldtakeis:I.secureoiltofires;II.increasefeedpumppressure.A、IB、IandIIC、IID、neitherInorII答案：A86.istheproductionofpurewaterfromseawaterbyevaporationandre-condensing.A、EvaporationB、CirculationC、CondensationD、Distillation答案：D87.Over-greasingofballbearingsinstalledonpumpswillresultin.A、smootherpumpoperationB、overheatingofthebearingC、reducedcorrosioninthebearingD、increasedpumpcapacity答案：B88.Theopeningofthehumidifier'svalveofair-conditionershouldbe,whenthecircumstancetemperatureislowerthan0°C.A、decreasedB、increasedC、fixedD、closed答案：B89.Alldeckmachineryrequireroutinemaintenancework,includingsplashlubricationforalltotallyenclosedworkingparts,lubricatingopengearsandclutcheswithopengearpoundand.A、oilingthebearingswithlubricantfromtheforcedfeedsystemB、greasingbearingsontheshaftswithhighpressuregunsC、paintingtheexposedpartswithanti-corrosivepaintD、disassemblingthemovingpartsonceeverytwomonths答案：B90.Therequiredrudderangleistransmittedfromthesteeringwheelatthebridgetothetelemotoratthesteeringgear.A、manuallyB、bypressedairC、byfueloilD、hydraulicallyorelectrically答案：D91.Ifananchorwindlasshasbeenidleforsometime,youshould.A