48輪機英語

1、中華人民共和國海事局2009年第5期海船船員適任統(tǒng)考試題（總第48期）科目：輪機英語試卷代號：805適用對象：無限近洋航區(qū)3000kw及以上船舶二三管輪（本試卷卷面總分100分，及格分為70分，考試時間100分鐘）答題說明：請選擇一個最合適的答案，并將該答案按答題卡要求。在其相應位置上用2B鉛筆涂黑。第1題至88題，每題1分，第89題至96題，每題1.5分。一、單項選擇題1.Dieselenginesclassifiedasrecipr

2、ocatinginternalcombustionenginesbecausethey____A.useenergyfromfuelburnedoutsidetheircylindersB.burnfuelinacombustionchamberthatmovesbackfthC.burnfuelinachamberwhereitsenergymovesapistonupdownD.acontinuouscombustionproces

3、stoimpartrotarymotiontothepistons2.Theabbreviation“MIP”stsf_____A.dleindicationpressureB.meanindicatedpressureC.meanindicatedpitchD.dleindicatedpower3.Thetermusedtoexpresstheignitionqualityofaparticularfuelis_____A.cetan

4、enumberB.octanenumberC.ignitionindexnumberD.volatilitypoint4.Theperiodwhenbothinletvalvesexhaustvalvesareopenisreferredtoas____A.valveloopB.valveuniflowC.valveoverlapD.valvegrinding5.Whichofthefollowingstatementsrepresen

5、tsthefunctionofthecompressionringsinstalledatthetopofadieselenginepistonA.ControltheamountoflubeoilburnedinthecombustionchamberB.TransmitheatfromthepistontothecylinderlinerC.Preventdamagetoringgroovesbyactionasaheatdam.D

6、.Dissipatecombustionchambergaspressurebychannelingitthroughtheringgap.6.Thegasloadsontheenginestructureareconstrainedbymeansofhydraulicallypreloaded_____Whichconnectthebedplateframesectionscylinderjacketsintoasingleunit.

7、A.connectingrodsB.meanbearingC.columnD.therods7.______ofdifferentthicknessareedbetweentheshellstoenableadjustmentofthebearingclearness.A.ScrewsB.FilmsC.DisesD.Shims8.Comparedtofourstrokecycleenginestwostrokecycledieselen

8、gineshavethedisadvantagesof____A.lesseventqueB.highercylinderheadtemperaturesC.fewerpowerstrokeperrevolutionD.greaterweightsizerequirements9.Duringthefuelimectionperiodfuelpressuremustexceedcylindergaspressureto_____A.en

9、sureperationdistributionofthefuelinthecombustionchamberB.ensuretheneedlevalveisflushedcleanduringeachinjectionC.preventcombustiongasblowbackintotheopenneedlevalveD.preventreflectedpressurewaveswhentheneedlevalvecloses10.

10、Theupperpistonringsinlargeslowspeedtwostrokecycledieselenginesaremosteffectivelylubricatedbyoil____A.fedfrommechanicallubricatsB.thrownofffromthemainbearingsC.suppliedfmwickfeddriplubricatsD.flowfromacentrifugalbanjooile

11、r11.Inadieselengineclosedfreshwatercoolingsystemtheamountofcoolantflowingthroughtheheatexchangeiscontrolledbythe_____A.sectionpressureregulatB.thermostaticbypassvalveC.seawatertemperatureD.waterlevelintheexpansiontank12.

12、Thepurposeofanaftercooleristo______A.reducetheturbogeroperationtemperaturethecauseisprobably_____A.excessivepumpspeedB.excessivesuctionheadC.wnwearingringsD.grosspumpmisalignment30.Propertiesofagoodrefrigerationoilinclud

13、e_______A.lowwaxcontentB.highpourpointC.highviscosityD.lowwaxcontenthighpourpointhighviscosity31.The_____onlyallowsfadjustmentoftemperatureineachroombytheoccupantmanuallycontrollingtheairvolumeadmitted.A.centralaircondit

14、ioningsystemB.highvelocitysystemC.lowvelocitysystemD.singleductsystem32.Theprocessofaddingmoisturetoairtoincreasetherelativehuityisknownas______A.sublimationBdesiccationC.huificationD.miniaturization33.Sludgymayfminthecr

15、ankcaseofanairconditioningcompressasaresultof_____A.bubblingrefrigerantB.overheatingoxidationC.loweredoperatingtemperaturesD.reducingthecloudflocpoint34.Whichoftheequipmentlistedismosteffectiveinprocessingbilgeslopsfover

16、boarddisgeA.a100PPMoilywaterseparatB.assemblingthelubeoilpurifierasaseparataligningittothebilgeoverboardC.a15PPMoilywaterseparatD.amagicduplexstrainer35.Whenstartedacompleteoilywaterseparatingunitisfirstfilled_____.Theoi

17、lywatermixtureisthenpumpedthroughtheinletpipeintothecoarseseparatingcompartment.A.withdirtywaterB.withcleanwaterC.byoilywaterD.bymixedwater36.WhichisthepollutionpreventionequipmentA.boosterpumpB.evapatC.incineratD.cooler

18、37.Concerningtheincinerat’soperationwhichofthefollowingisnotcrectA.scavengingtimeshouldbemethan30secondsbefeignitingB.theoiltemperatureofwasteoiltankis80100℃C.firstignitingtheincineratwithdieseloilwhenthetemperatureofhea

19、rthisabout600℃thewasteoilisdrawnin.D.theashfromincineratcanbedumpedintoseanodistancelimitation38.Bacteriawhichlive____aresaidtobeaerobicA.inthepresenceofoxygenB.withoutoxygenC.inthepresenceofnutritionD.withoutnutrition39

20、.Fapurifierchangingtoagravitydiscwithsmallerholediameterwillmovetheinterfacetowardsthe______A.bowlperipheryB.bowlcenterC.uppersurfaceD.lowersurface40.Toensurelubeoilpurifierwkinginnmalconditiontheintervalbetweentwosludgy

21、disgingshouldnotexceed____hours.A.2B.4C.5D.641.WhichofthefollowingproblemswilloccurifadisktypecentrifugallubeoilpurifierisnotproperlyprimedpritoadmittingoilflowtothebowlA.Contaminationofthelubeoilbyemulsificationwillresu

22、ltB.ThelubeoilwillnotbesubjectedtothepropercentrifugalfceC.ThelubeoilwilloverheatflashD.Oilwilldisgefromtheheavyphasedisgeptbewasted42.Avacuumisinitiallycreatedinaflashtypedistillingplantby_____A.theflashingofthefeedwate