甲类三管英语考试试题.doc

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1、1、Inthetwostrokedieselengine,itisdesignedsothattheoilimpingementistimedtoproceedonlyonthepistonringbeltduring________.A.compressionstrokeB.suctionstrokeC.expansionstrokeD.exhauststroke2、Inafourstrokeengine,whichprocesslaststhelongestperiod?A.exhaustands

2、uctionprocessB.suctionandcompressionprocessC.combustionandexhaustprocessD.workingandexhaustprocess3、Onwhatdoyoudependhavingtheaircoolerofmainenginechemicallywashed?A.increasedairpressuredifferencebeforeandaftaircoolerB.reducedexhausttemperatureinallcyli

3、ndersC.reducedtemperaturedifferencebetweenwaterinletandoutletD.bothAandC4、Whenoccurringafireinthescavengeairbox,thefollowingmeasuresshouldbetakenexceptfor________.A.reducingspeedtoSLOWandaskingbridgeforpermissiontostopB.stoppingthefueloilsupplyC.switchi

4、ng-ontheauxiliaryblowersD.puttingthescavengeairboxfireextinguishingequipmentintofunction5、Continuoussurgingofturbochargercanbecausedby________.①crashstopofengine;②increasedbackpressureafterT.Ch.;③fouledordamagedturbinenozzlering.A.allarecorrectB.②and③ar

5、ecorrectC.noneoftheaboveiscorrectD.①onlyiscorrect6、Whenasuddenincreaseinsteamdemandoccursfromtheboiler,thewaterlevelinthedrumatthehigherpressurewill_______.A.risequicklyB.riseslowlyC.dropquicklyD.dropslowly7、Onmodernships,centrifugalpumpwithaself-primer

6、hasreplacedreciprocatingpumpasbilgepumpbecause________.A.centrifugalpumpischeaperthanreciprocatingpumpB.thesizeofcentrifugalpumpwithsamecapacityissmallerthanthatofreciprocatingpumpC.centrifugalpumpmakesmaintenanceeasierthanreciprocatingpumpdoseD.allofth

7、eabove8、Whichcauseoffollowingwillnotleadtorefrigerationplantshort-cycle?A.lackofrefrigerantB.refrigerantwithmuchwaterC.setdefectivelylowpressurerelayD.nocoolingwater9、Toreceiveoilresiduesfromthepurificationoffuelandlubricatingoilsinthemachineryspaces,wh

8、atkindoftank(s)shouldbeprovidedonboard?A.bilgetankB.sludgetankC.overflowtankD.oilcollectingtank10、Theoildischargemonitoringsystemintheoiltankervesselsisusedfordetectingtheamountofoildischargedoverboardtoensurethatitdoesnotexceed_