轮机英语补充题目

新题

1.Thedatatoberecordedonthissheet____theperformanceoftheengine.

A.makestheexpertstojudge

B.enablestheexpertstojudge

C.maketheexpertsjudging

D.enabletheexpertstojudge.

2.Cooling_____theenginemetalsretaintheirmechanicalproperties.

A.forces

B.enables

C.makes.

D.isableto

3._____thateverythingintheenginecrankcaseiscorrect,startupthecrankcaselubricatingoilpump.

A.Tosatisfy

B.Tobesatisfied

C.Mtersatisfying

D.Afterbeingsatisfied.

4.Hearingastrongnoise,_____atonce.

A.theenginestopped

B.theenginewasstopped

hestoppedtheengine.

D.hehadstoppedtheengine

5.Thetwo-strokecyclebeginswiththepistoncomingupfromtheBDC,withthescavengingportsinthesidesofthecylinders

being_.

A.open.

B.uncover

C.covered

D.closed

6.Hieterm“moderatespeed“waspreviouslyinterpretedasmeaningaspeedwhichwouldenableavessel______withinhalf

therangeofvisibility.

A.stopping

B.beingstopped

C.tostop

D.tobestopped.

7.Hardlyhadtheenginestarted______thetemperatureofthecoolingwatersuddenlyroseupto40c.

A.then

B.than

C.when.

D.after

8.duringthelastrepair?

A.DidyouhaveNo.4cylinderrepair

B.DoyouhaveNo.4cylinderrepaired

C.DidnttyouhaveNo.4cylinderrepairing

D.Didn'tyouhaveNo.4cylinderrepaired.

9.Themainengineiscooledwithfreshwater______isaddedsuitablesmallquantitiesofchemicalstopreventcorrosion.

A.inwhich

B.onwhich

C.towhich.

D.bywhich

10.Theexhaustportsarelocatedaroundthelowerpartofthecylinderliner,_____theproductsofcombustionaredrivenby

scavengingair.

A.inwhich

B.bywhich

C.throughwhich.

D.fromwhich

11.Whenenteringafoaminjectedspace____breathingapparatus.

A.putout

B.puton.

C.takeoff

D.takein

12.Theexhaustvalveisopenedataboutthesametime____theairinletportsareopened.

A.before

B.after

C.when.

D.until

13.,wecontinuedliftingoutthepistons.

A.Lateasitwas.

B.Asitwaslate

C.Sinceitwaslate

D.Becauseofitslate

14.doesittaketochangethemainenginefromaheadtoastern?

A.Howmanytimes

B.Howmuchwater

Howlong.

D.Howlength

15.Wehaveplannedtoremovethepistonwiththehelpofassistantengineersduringthecai^ounloading,whilethevessel

portShanghai.

A.reachesto

B.gets

C.callson

D.callsat.

16.thefollowingpossiblecausesshouldbeinvestigated.

A.Shouldtheenginestopwithoutapparentreason.

B.Theengineshouldstopwithoutapparentreason

C.Theenginestopswithoutapparentreason

D.Tlicengineisstoppedwithoutapparentreason

17.Tliedifferencebetweenasuperchargedengineandanun-superchargedengineisthat_____,

A.thelater

B.thelatter

C.theformer.

D.thefarmer

18.canbefoundonmostmediumtolargemerchantvesselsevenifthemainengineiseitherasteamturbineor2-stroke

crossheadengine.

A.Themediumspeed4-stroketrunkpistonengine.

B.Thelowspeed2-strokecrossheadengine

C.Themediumspeed2-strokecrossheadengine

D.Tlielowspeed4-stroketrunkpistonengine

19.allowstheenginetobeplacedwhereverismostsuitable,astheynolongerhavetobealignedwithreductiongearing

andshaftingasisthecasewithconventionalinstallations.

A.Dieselenginepropulsion

B.Dieselelectricpropulsion.

C.Steamenginepropulsion

D.Gasturbinepropulsion

20.Mediumspeedengineshavea____powertoweightratiothantheslowspeedtwostrokes,butduetothehigherspeeds

tendtohave____mamtenanceintervak.

A.higher/reduced.

B.higher/increased

C.lower/reduced

D.lower/increased

21.Thepurposeoftheskirtortrunkinfour-strokecycleenginesistoactinasimilarmannertoa____.

A.crosshead.

B.crown

C.pistonrod

D.connectingrod

22.Thefour-strokecycleissocalledbecauseittakes____tocompletetheprocessesneededtoconverttheenergyinthefuel

intowork.

A.twostrokesofthepiston

B.fourstrokesofthepiston.

C.onerevolutionofthecrankshaft

D.fourrevolutionsofthecrankshaft

23.Inthesuctionstroke,thecrankshaftisrotatingclockwiseandthepistonismoving_____thecylinderTheinletvalveis

_____andafreshchargeofairisbeingdrawnorpushedintothecylinderbytheturbocharger.

A.up/opened

B.down/open.

C.up/closed

D.down/closed

24.Itisduring_____thatworkenergyisbeingputintotheengine;duringtheother3strokesofthepiston,theengineishaving

todothework.

A.thesuctionstroke

B.thecompress沁nstroke

C.theexpansionstroke.

D.theexhauststroke

25.Pressurizedairentersthecylinderviatheinletportsandpushestheremainingexhaustgasfn)mthecylinderinaprocess

knownas“_____

A.charging

B.supercharging

C.scavenging.

D.exhausting

26.Thebedplatemustberigidenoughtosupporttheweightoftherestoftheengine,andmaintainthecrankshaft,whichsitsin

thebearinghousingsinthe,inalignment.

A.longitudinalgirders

B.transversegirders.

C.foregirders

D.aftgirders

27.Basicallythebedplateconsistsoftwo______,whichrunthelengthoftheengine.

A.longitudinalgirders.

B.transversegirders

C.foregirders

D.aftgirders

28.TheA-framescarrythecrossheadguidesandsupporttheengine______.

A.foundation

B.seating

Q.entablature.

D.bedplate

29.Topreventexcessive____inthetransversegirders,thetieboltsarepositionedasclosetothecenterofthecrankshaftas

possible.

A.thermalstresses

B.bendingmoments.

C.thermalloads

D.surfacetensions

30.Becausethetieboltsaresoclosetothecrankshaft,someenginesemploy_____toholdthecrankshaftmainbearingcapin

positioninsteadofconventionalstudsandnuts.

A.throughbolts

B.jackbolts.

C.i叩bolls

D.fittedbolts

31.Thecrankshaftsonthelargemodem2-strokecrossheadenginesarebigmakesasasingleunitandsoare

constructedbyjoiningtogetherindividualforgings.

A.enough/to

B.too/to.

C.such/so

D.so/that

32.Thecrankpinsandjournalsweremachinedandmatchingholesboredinthewebs,whichwereslightly_____indiameter.

A.smaller.

B.larger

C.higher

D.lower

33.Today,crankshaftsforhrge2-strokecrossheadenginesareofthe_____type.

A.semi-buill.

B.built-up

C.solidforged

D.individualforged

34.Theofthesemi-builtmethodoftheconstructioncrankshaftisthatbymakingthetwowebsandcrankpinfroma

singleforgingthegrainflowinthesteelfollowsthewebn)undintothecrankpinandbackdowntheotherweb.

A.advantages.

B.disadvantages

C.poweradvantages

D.powerdisadvantages

35.Theconnectingrobisfittedbetweenthecrossheadandthecrankshaftlttransmitsthefiringforce,andtogetherwiththe

crankshaftconvertthe_motiontoa_____motion.

A.rotary/reciprocating

B.upanddown/foreandaft

C.foreandaft/upanddown

D.upanddown/rotary.

36.Theslippersrun______inthecrossheadguidesasthepistonandrodare_______andpreventthetopoftheconnectingrod

frommovingsideways.

A.upanddown/reciprocating.

B.upanddown/rotating

C.backandforth/reciprocating

D.backandforth/rotating

37.Becausethetopoftheconnectingrodswingsaboutthepinandchangesdirectioneachtimethepistonreachesmid-stroke,

therelativespeedbetweenbearingandpinatmid-strokeiszero,_toaniaximumasthepistonapproachestopor

bottomdeadcenterandthenbacktozeroagainasthepistonapproachesmid-strokeandtheconnectingrodchanges

direction.

A.accelerates/decelerates.

B.accelerates/accelerates

C.decelerates/decelerates

D.decelerates/accelerates

38.Tlieloadonthecrossheadpinisalways,soitisthe______half*ofthebearingwhichissubjecttowear.

A.upwards/top

B.upwards/bottom

C.downwards/top

D.downwards/bottom.

39.Becauseofthehy>hloadsthebearingmaterialisatin-aluminumalloybondedtoasteelshellThecrossheadpinishighly

polishedtoa_・

A.flatsurface

B.mirrorfinish.

C.slopingsurface

D.inclinedsurface

40.Oilissuppliedtothecrossheadusingaswingingamiora_____andissometimesboosteduipressuretoandefficient

lubrication.

A.telescopicpipe.

B.largeborepipe

C.generatingpipe

D.centralpipe

41.Becauseoftheresultinghigherpressuresinthecylinderfromthecombustionofthisgreatermassoffuel,andthelarger

diameters,thelinermustbemade_atthetoptoaccommodatethehigherstresses,andpreventcrackingofthe

material.

A.thinner

B.thicker.

C.smoother

D.rougher

42.Cylinderlinersfromolderlowerpoweredengineshadauniformwallthicknessandthecoolingwasachievedbycirculating

coolingwaterthroughaspaceformedbetween_.

A.crownandskirl

B.linerandjacket.

C.ringandgroove

D.jacketandblock

43.Fuelhastobeinjectedintotheengineatahighpressuresothatit_____correctly.

A.ispurified

B.intimed

C.iscompressed

D.atomizes.

44.Becausethetimingofinjectioniscrucial,_____mountedonthecamshaft,whichisdrivenbythecrankshaftareusedto

operatethefuelpumps,oneofwhichisprovidedforeachcylinder.

A.gears

B.rams

C.barrels

D.cams.

45.Thehigh-pressurefuelopensthefuelvalveandissprayedintothecylinderintinydropletsknownas____.

A.injection

B.penetration

C.atomization.

D.compression

46.Itisimportanttonotethattheinjectiononlytakesplacewhentheplungerismovingupthecam____,

A.basecircle

B.slope.

C.bottompoint

D.toppoint

47.Astheplungermovesupwardsinthebarrel,injectionwillcommenceoncetheplungerhas_____thespillportsandthe

pressurebuildsup.

A.openedup

B.closedoff.

C.linedup

D.takenoff

48.Itshouldbeevidentthattheamountoffuelinjectedintothecylinderisdependentonthepositionofthehelixrelativetothe

A.inletport

B.exhaustport

Q.spillport.

D.scavengeport

49.Theplungerismachinedtoveryfinetolerances,asisthematched_____inwhichitreciprocates.

A.barrel.

B.ram

C.piston

D.rod

50.Fuelsofdifferentqualitiesmayrequireadvancingorretardingtheinjectiontiming,inadditiontowhichiftheinjection

timingisadvancedwhentheengineisrunningatloadsbelowthe_,thenasavinginfuelcanbeachieved.

A.BHP

B.MCR.

C.IHP

D.MEP

51.Injectorsonmodernenginesarecooledbyacombinationoftheintensiveborecoolinginthecylinderbyacombinationof

theintensiveborepocketsandbythefuelwhichisre-circulatedthroughtheinjectorwhenthefollowerisonthe_of

thecamorwhentheengineisstopped.

A.slope

B.base.

C.top

D.bottom

52.theoxygencontentintheexhaustgas,__________thecombustionis.

A.Thelower/theworse

B.Thehigher/thebetter

C.Thelower/thebetter.

D.Thehighest/theworst

53.Toomuchexcessairis______becausetheheatgeneratedisbeinglostthrnughtheexhausttrunkinginsteadofbeingmade

usedofinheatingthewatertoproducesteam.

A.notgood.

B.good

C.better

D.thebest

54.Onengineshavingoilcooledpistonsthelubricatingoilpre-hcatermustbeputintooperationandtherateofheatingso

thatthetemperatureofthepistoncoolingoilreturnsare32to35coveraperiodofatleasttwohours.

A.slow

B.quick

C.arranged.

D.high

55.Iftheenginecanbestartedandmaneuveredonhighviscosityfuel,the______ofthefuelreachingtheinjectorsshouldbe

raisedtosuchapointthattheviscosityislessthantherequiredvalue,i.e27cSt.

A.pressure

B.temperature.

C.viscosity

D.density

56.Starttheturninggear,andwithsomeonehand-operatingthecylinderlubricatorsatregularintervals,andwiththe

indicatorcocks_,andwiththecontrolgearinthe______position,givetheengineatleastonecompleteturn.

A.open/"stop".

B.closed/"stop"

C.open/"start”

D.closed/"start"

57.Foratiretobegintheremustbepresentacombustiblematerial,oxygenorairto______combustion,andasourceofheat

atatemperaturehighenoughtostartcombustion.

A.begin

B.support.

C.last

D.extinguish

58.Indicationsof______arelossinpowerandirregularrunningoftheengine,highexhausttemperaturesofcorresponding

unite,highlocaltemperatureinscavengetrunk,surgingofturbocharger,andspariksandsmokeemittedfromscavenge

drains.

A.acrankcaseexplosion

B.ascavengefire.

C.abnormalcompressionraUo

D.incorrectair/fuelratio

59.InshipswheretheengineroomisdesignedasUMS,temperaturesensorsarefittedatcriticalpointswithinthescavenge

spacesActivationwouldcauseautomatic_oftheengine.

A.stop

B.start

C.speedup

D.slowdown.

60.Ifascavengefirestarts,theenginemustbeputto"______"andthefuelmustbetakenoffthecylindersaffectedbythefire.

A.stopengine

B.finishedwithengine

C.deadslowahead.

D.deadslowastern

61.Thelubricationtothecylindersaffectedbythefiremustbetopreventseizureandallscavengedrainsmustbe

topreventthedischargeofsparksandburningoilfromthedrainsintotheengineroom.

A.decreased/opened

B.decreased/shut

C.increased/opened

D.increased/shut.

62.Ifthescavengefireisofamoremajornature,ifthereisariskofthefireextendingorifthescavengetrunkisadjacentto

thecrankcasewithriskofahotspotdevelopingitsometimesbecomesnecessarytotheengine.

A.stop.

B.start

c.speedup

D.slowdown

63.Fuelinjectionequipmentmustbekeptingoodcondition,timedcorrectly,andtheineachcylindermustalsobe

carefullybalancedsothatindividualcylindersarenotoverloaded.

A.M1P.

B.MCR

C.MEP

D.BHP

64.Ifcylinderlinerwearisuptomaximumlimitsthepossibilityofscavengefireswillnotbemateriallyreduceduntiltheliners

are_・

A.polished

B.renewed.

C.adjusted

D.ground

65.Theinjectionmaybedelayed,_____thepumpsareingoodorder,ifthefuellinestotheinjectionvalveshavenotbeen

clearedofair.

A.because

B.though.

C.since

D.until

66.Iftheactionoftheengineindicatesthatsomeofthecylindersarenotfiring,theonesaffectedmaybedeterminedby

watching_.

A.thebadsmoke

B.thesmokyexhaust

C.theexhausttemperature.

D.thepeakpressure

67.If____aretakenatregularintervals,anyunequaldistributionofloadwillbeeasilyfoundout.

A.indicatordiagrams.

B.nomo-gram

C.temperaturereadings

D.pressurereadings

68.Mosttroubleslikelytooccurwithmarinedieselenginecan,iflocatedintime,beremediedwithnodifficultyandmanycan

beiftheengineismaintainedwithahighsenseofresponsibilitytothepeopleonthepartofthemotormenand

engineers.

A.foundout

B.eliminated

C.avoided.

D.lowered

69.Thedieselengineissimilartothegasolineengineinthat__

A.bothofthemareignitedbycompressedair

B•bothofthemaretheformsofexternalcombustionengines

C.bothofthemhavesparkplugs

D.thepowerisdevelopedbythepistoninthecylinder.

70.Thereasonwhymoreandmoreofthelargemerchantvesselsarebeingpoweredbymedium-speeddieselenginesis

A.theyoperatebetween150and450rpm

B.theyareconnectedtothepropellerbygearing

C.theirsmallersizeandweight.

D.theycanbeconnecteddirectlytothepropellerwithoutgearing

71.Gasturbinesdifferfromsteamturbinesinthat.

A.steamratherthangasisusedtoturnashaft

B.vaporratherthangasisusedtoturnashaft

C.theformerusesgastoturnashaft.

D.thelatterusesgastoturnashaft

72.Coolingmakestheenginemetalstheirmechanicalproperties.

A.Remain

B.toremain

C.retain.

D.toretain

73.Asuperchargedenginediffersfromanun-superchargedengineitoperatesatanincreasespressure.

A.inwhich

B.onwhich

C.atwhich

D.inthat.

74.Defectiveatomizerinadieselenginewillleadto.

A.smokyexhaust.

B.startingfailure

C.overload

D.overspeed

75.Defectiveaircoolerinadieselenginewillleadto.

A.smokyexhaust.

B.startingfailure

C.overload

D.overspeed

76.Defectivegovernorinadieselenginemayleadto.

A.smokyexhaust

B.startingfailure

C.ignitionrelay

D.overspeed.

77.Defectivetiminggearinadieselenginemayleadto.

A.smokyexhaust

B.startingfailure.

C.overload

D.overspeed

78.Ifexhausttemperaturesaretoohigh,youshouldcheck.

A.aircooler

B.turbocharger

C.chargeair

D.A+B+C.

79.Ifscavengeboxshouldbehot,wouldoccur.

A.seizedpiston

B.defectiveatomizer

C.scavengefire.

D.toomuchL.O

80.Abuilt-upexhaustvalveisoneinwhich_____.

A.thestemandheadsaremadeofdifferentmaterial.

B.low-alloysteelisusedthroughout

C.areplaceablevalvediskisweldedtothehead

D.theself-centeringactioncomesfrommotionofthevalvestemintheguide

81.Poorcombustioninadieselenginecanbecausedby______.

A.highcompressionpressure

B.lowintakeairtemperature

C.lowexhaustpressure

D.highscavengeairtemperature.

82.Whichofthefollowingmaycausethatanenginedoesntturnonstartingair?

A.toolowstartingairpressure

B.mainstartingvalveclosed

C.neitherAnorB

D.AandB.

83.Combustionknockcanoccurinthecylindersofadieselengineunderanyconditionpermitting

A.ashortenedignitiondelayperiod

B.aleanfuel/airmixture

C.excessfuelinthecombustionchamber

D.rapidvaporizationofinjectedfueldroplets.

84.Toavoidscavengefiresoccurringtheenginetimingandequipmentmaintenance

A.shouldbecorrectlycarriedout.

B.shouldcorrectlybetakenplace

C.shouldcarriedwithcare

D.musttocarryoutwithgreatcare

85.Theviscosityregulatorcontrolsthefueloiltemperatureprovideoilatthecorrectviscosityforcombustion.

A.inorderthat

B.becauseof.

C.inorder(o

D.owingto

86.Duringtheinspection,thestartingairvalvesshouldbeclosed______theenginefromturning.

A.toincrease

B.tospeedup

toprevent.

D.toreduce

87.Theusualmethodofeffectivelyapplyingfoamonafireisby______.

A.sprayingdirectlyonthebaseofthefire

B.flowingthefoamdownaverticalsurface.

C.sweepingthefirebeforeyouwiththefoam

D.sprayingdirectlyonthesurfaceofthefire

88.Precisionenginebearinginsertsaremanufacturedwithasmallportionofthebearingendsextendingbeyondthebearing

housingorcapsTheinstalhtionprocessofthesebearingsrequiressufficient_.

A.overlap

B.crush.

C.laporlead

D.protrusion

89.Asforturbineoil,contactingwithwaterintheformofsteamwillbeinevitablesogoodpropertieswillbeessential.

A.defrosting

B.de-oiling

C.demulsifying.

D.dehumidifying

90.The__engineisusedforalternatorsandsometimesformainpropulsionwithagearboxtoprovideapropellerofbetween

90to120rpm..

A.four-stroke.

B.two-stroke

C.slowspeed

D.reversible

91.Tocorrectahuntingprobleminamainpmpulsiondieselenginehydraulicgovernor,youshould______.

A.increase(hegovernoroilpressure

B.adjustthespeeddroopsetting

C.adjustthespeederspringtravel

D.adjustthecompensatingneedlevalve.

92.Thelowersectionofapistoniscalledthe.

A.land.

B.skirt

C.crown

D.plate

93.Whichofthefollowingcanbeobtainedbymeansofanindicatorcard?

A.thepeakpressureinacylinder

B.thetemperatureofthecoolingwater

C.thefuelconsumption.

D.noneoftheabove

94.Grindthe.

A.keyway

B.shaft

C.packing

D.valve.

95.,theenginemustbestoppedimmediately.

A.Shouldknockingoccur.

B.Ifknockingoccur

C.Shouldifknockingoccurs

D.Ifoccurknocking

96.Thethreebasicpartsofanyeductorarethenozzle,thesuctionchamber,andthe_____.

A.injector

B.compressor

C.diffuser.

D.siphon

97.Adieselenginewhichisratedfornormaloperationatacrankshaftspeedof800RPM,iscommonlyclassedasa

A.slow-speeddiesel

B.medium-speeddiesel.

C.high-speeddiesel

D.constant-speeddiesel

98.Thepressuredifferencebeforeandafterthelubeoilfilterindicates_____thefiltershouldbecleaned.

A.when.

B.how

C.where

D.whether

99.Themechanicalefficiencyofanengineisalwayslessthan100%____lossesoccurringintheformfriction.

A.because

B.since

Q.dueto.

D.owingto

100.Energylosesfrictionoccursineveryengine.

A.because.

B.thanksto

C.duesto

D.owingto

101.JamesWatt_____thesteamenginein1796.

A.discovered

B.haddiscovered

C.invented.

D.hadinvented

102.Pumpupthestartingairreservoirstotheirmaximumpressureand_____theairreservoirsandairsystem.

A.open

B.close

C.drain.

D.vent

103.Tliefour-strokecyclebeginswiththepiston.

A.comingupfromtheBDC

B.comingupfromtheTDC

C.comingdownfromtheBDC

D.comingdownfromtheTDC.

104.themoveableplateandfloatingringinsidethepumpisveiydifficult.

A.Havingadjusted

B.Beingadjusted

C.Toadjust.

D.Adjusted

105.Nosooner_____thantheystartedtorepairthesludgepump.

A.thesecondengineerhadgotintotheengineroom

B.thesecondengineergotintotheengineroom

C.hasthesecondengineergotintotheengineroom

D.didthesecondengineergetintotheengineroom.

106.Theyoungmotomianaswellastheothers______tooperatetheoilseparator.

A.haslearnt.

B.havelearnt

C.learn

D.arelearning

107.Beforedismantlingthepipe,wouldyoutheoilretainedinthehosewith____?

A.flash/freshair

B.wash/freshwater

Cflush/compressedair.

D.rush/dieseloil

108.TheoilsludgeisburntintheonboardI,IIshowyoutheashes.

A.boiler

B.mainengine

C.auxiIiiiryengine

D.incinerator.

109.Inboilers,besidesmaintainingtheburneratomizers,airdiffuservanes,fueltemperature,forceddraftfan,fuelpumpand

otherhardwareingoodcondition,therearesomeadjustmentsonthe_thatcanproduceagoodflameforthemost

efficientoperation.

A.fuel-airratio.

B.compressionratio

C.fuelrack

D.viscosityindex

110.Deckmachinery,whichisalsoknownashullmachinery,includesallpowerdrivenequipmentlocated____themachinery

spacesthatis______withthemainpropulsionplant.

A.inside/associated

B.inside/notassociated

C.outside/associated

D.outside/notassociated.

111.OlllThetransmissionsystemisthemeans____themovementoftherudderisaccomplished.

A.bywhich.

B.towhich

C.inwhich

D.atwhich

112.Tlierequiredrudderangleistransmittedhydraulicallyorelectricallyfromthesteeringwheelatthebridgetothe____at

thesteeringgear,justabovetherudder.

A.transmitter

B.tele-motor.

C.hydraulicram

D.hydrauliccylinder

113.Inthevariabledeliverypump,movingthespindlemorefromthecentralpointwillcause____fluidtobepumpedand

consequently_____pressureisgeneratedtodrivetherams.

A.more/more.

B.more/less

C.less/more

D.less/less

114.Certainreq