《輪機(jī)英語》二三管輪考證必備

第一章船舶動(dòng)力裝置

1.“Beforedisconnectingtheoilpipe,wouldyouflushtheoilretainedin

thepipe?”askedtheoilbargeowner.

A.byusingoffreshwater

B.withcompressedair

C.byusingofseawater

D.withchemicalcompound

2.“Standbyanengine“means.

A."preparetostoptheengine^^

B?"assembleanengineonitsbedplate^^

C."makeanenginereadyforstarting^^

D."dismantleanengine”

3.Aisthefoundationoftheengine,withoutthesupportofwhichthe

shaftalignmentinparticular,andenginestructureasawhole,wouldinevitablybe

lost.

A.Frame

B.Bedplate

C.Cylinder

D.Liner

4.arecommonlyusedinmechanical-hydraulicgovernortosenseengine

speeds.

A.Bulbs

B.Bulks

C.Flyweights

D.Flywheels

5.aregenerallyformedintheframeofthebothin-lineandVeeengines

togivemaintenanceaccesstothecrankshaftmainandconnectingrodlargeend

bearing.

A.Doors

B-Aspirategauzer

C.Coupling

D.Blind

6.deviceisprovidedtopreventstartingairfrombeingadmittedtothe

cylinderbeforethereversingiscompleted.

A.Anautomatic

B.Atransmission

C.Aself-regulating

D.Aninterlocking

7.fueloilslubricatingoilsrequiretreatmentbeforepassingto

theengine.

A.Both/and

B.Neither/nor

C.Either/or

D.Both/or

8.issometimesusedforpistoncoolingsinceleaksintothecrankcase

wouldnotcauseproblems.

A.Dieseloil

B.Hydraulicoil

C.Lubeoil

D.Mineraloil

9.istheremovalofexhaustgasesbyblowinginfreshair.

A.Gasexchange

B.Charging

C.Scavenging

D.Supercharging

10.isusedforcylinderandcylinderhead,thesaltwaterisusedfor

coolingthelubricatingoil,thefreshwaterinthecoolersandthechargingairinthe

aircooler.

A.Thefueloil

B.Thelubeoil

C.Theseawater

D.Thefreshwater

11.maybethefirstpossiblecausewhichmakestheenginetolosepower

orslowdownwhenitisrunning.

A.Hotbearing

B.Startingvalves

C.Unequaldistributionofload

D?Excessivecrankshaftclearance

12.ofanenginecrankshaftcanbedetectedbymeasuringdeflectionsof

crankwebsforeachunitoftheengine.

A.Misalignment

B?Length

C.Strength

D.Stresses

13.oftheA-framesthereisastrongcastironframecalledthescavenging

airbox.

A.Atthetop

B.Atthebottom

C.Inthetop

D.Inthebottom

14.pistonshavelowinertiaandhighcoefficientofthermalexpansion.

A.Castiron

B.Caststeel

C.Forgedsteel

D.Aluminum

15.shouldnotundertakeanytaskwhichwillinterferewiththesupervision

dutiesrelatingtothemainmachineryandassociatedequipment.

A.Thewatchkeepingpersonnel

B.Thechiefengineer

C.Thepersononabunkerbarge

D.Anyoftheabove

16.thecylinderwillcontainagreatweightofairandwillbecapable

ofburningagreatquantityoffuel.

A.Atthebeginningofthecompressionstroke

B-Atthebeginningofthesuctionstroke

C.Attheendoftheworkingstroke

D.Attheendoftheexhauststroke

17.thesuperchargepressureis,poweranenginedevelops.

A.Thehigher/themore

B.Higher/more

C.Higher/little

D.Thehigher/theless

18.isnotproperlysetthuscausingeitheradvancedorretardedfiring.

A.Apiston

B.Afuelinjectionpump

C?Afeedwaterpump

D.Alubeoilpump

19.rodsarenotinproperconditionsothattoomuchfuelissupplied

tothecorrespondingcylinder.

A.Piston

B.Sounding

C.Regulating

D.Connecting

20.shows1.2meterandthespecificgravityoftheoilis0.96According

tothemeasuringscale,thatmakes150tons.

A.Thepistonrod

B.Thepushrod

C.Thesoundingrod

D.Theconnectingrod

21.allowsforexpansionandwatermakeupinthewatercoolingsystem.

A.Atoptank

B?Aheadtank

C.Aheadvalve

D.Adraintank

22.attheendofthedistributionpipeensuresthatadequatepressure

ismaintainedbythepump.

A.Areliefvalve

B.Analarm

C-Apressuregauge

D-Anon-maimvalve

23.isusedforwashinganddrinking.

A.Theballastsystem

B.Thesaltwatersystem

C-Thebilgesystem

D.Thedomesticsystem

24.providethewatertothepistons.

A.Pneumaticpipes

B.Hydraulicpipes

C.Telescopicpipes

D.Operatinggaspipes

25.arefittedintheexhaustsystemandfacilitatechargeremovaland

scavengingineachcylinder.

A.Diffusers

B-Compressors

C.Steamboilers

D.Sootblowers

26.areformedbyabrasiveparticlesenteringthebearingandscoringthe

shaft.

A.Grooves

B-Recesses

C.Ridges

D.Nips

27.aremountedonandboltedtothebed-platecrossgirders.

A.Thecrankshaft

B.Thecrankcase

C.Theguide-ways

D.Theframes

28.isaprecautionwhichcontributestoavoidingtroubleundernormal

operatingconditions.

A.Constantinspection

B-Keepingconstantload

C.Remainingconstanttemperature

D.varyingspeed

29.isasourceofpowerbywhichthedieselenginemayoperate.

A.Waterenergy

B.Electricalenergy

C.Chemicalenergy

D.Heatenergy

30.isarrangedforcleaningthelubricatingoilinthesystemandclean

oilcanbeprovidedfromastoragetank.

A.Afilter

B.Acentrifuge

C.Adistiller

D.Agenerator

31.isfullyfloatinginbothconnectingrodsmallendandthepistonskirt.

A.Thepistonrod

B-Thecrossheadpin

C.Thegudgeonpin

D.Thecrank-pin

32.ismadeofabosswithseparatedbladesmountedintoit.

A.Avariablepitchpropeller

B.Avariablepitchnut

C.Afixedpitchparallel

D-Afixedpitchscrew

33.isusuallydrivenbytheenginecamshaftandsuppliespilotairto

thecylinderairstartvalve.

A.Anairreceiver

B.Anoperatingvalve

C.Anautomaticvalve

D-Anairdistributor

34.neutralizestheacidconditionsandcleansestheringsand

grooves.

A.Thedetergency/thealkalinity

B.Thealkalinity/thedetergency

C.Theinhabitant/thewater

D.Theadditives/thedistilledwater

35.orairventingarrangementisfittedtothefuelsupplypassage.

A.Anairpump

B.Acompressor

C.Afuelpump

D.Apriming

36.providinglubricatingfilms,oilusedinmarinedieselengineshave

toremoveheatfromoilcooledpiston.

A.Exceptfor

B.Beside

C.Except

D.Inadditionto

37.theengines,thedieselengineisusedengineonboard.

A.Between/morecommonly

B.Among/themostcommonly

C.Between/notmorecommonly

D.Among/notthemostcommonly

38.waterismoreexpensivethanfreshwaterlthashighspecificheatand

lowviscosity.

A.Distilled

B.Distilling

C.Boiling

D.Boiled

39.forthecamshaftgeartrainistakenfromaspurgearwhichforasix

cylinderengineisatthecouplingend.

A?Thedrivengear

B.Thedrive

C.Thegrease

D.Thelubricatingoil

40.inwhatpositiontheenginestopstherewillalwaysbeatleastone

ofthecylinderswithitsstartingairvalveopentoadmitcompressedairtostartthe

engine.

A.Because

B.Owingto

C.For

D.Nomatter

41.issecuredbymeansofside-chockboltsandend-chockbolts.

A.Thebedplate

B.Thecolumn

C.Themainbearing

D.Thedoublebottom

42.usuallyhelpstoinduceairmovementtoassistcombustion.

A.Cylindercover

B.Mainbearing

C.Theexhaustvalve

D.Thepistonmovement

43.mayhavetwoemergencysourceofpower,thusrequiringtwoemergency

switchboards.

A?Largepassengervessels

B.Generalcargoships

C.Containerships

D.Oiltankers

44.suppliespilotairtocontrolthecylinderairstartvalves.

A?Anaircompressor

B.Anindicatorcock

C-Anairdistributor

D.Asafetyvalve

45.clearancesinthemainorcrankpinbearingswillsometimesbe

indicatedbylossofpressureinthelubricatingsystembeforeanybearingknockis

heard.

A.Toolarger

B.Toosmaller

C.Excess

D.Excessive

46.Acaststeelstrongbackisfittedinwayofthecombustionspacetohelp

absorb.

A.flametemperature

B.fueloil

C.airmovement

D.gasforces

47.Achargeoffreshairisdrawnintotheenginecylinderandthenby

themovingpistonveryhighpressure.

A.pressed/to

B-pressurized/with

C.pushed/in

D.compressed/to

48.Acommontroublewiththefuelpumpplungerorfuelvalvespindleis.

A.waterleakage

B-steamleakage

C.oilleakage

D.airleakage

49.Acommontroublewiththefuelpumpplungersorfuelvalvespindleis.

A.brokendown

B.stuck

C.oilleakage

D.carbonized

50.Adieselengineissimilartoagasolineengineexceptthattheformerhas

no.

A.cross-head

B.cylinder

C.connectingrod

D.sparkplug

51.AdieselenginescrankcaseoillevelisfoundtobetoohighYoushouldsuspect

that.

A.theenginewasoverfilled

B.theremightbeafuelleak

C.theremightbeawaterleak

D.alloftheabove

52.Adistancepiece,knownasamaybeinterposedbetweentherodand

thebearinghousing.

A.bearingshell

B.bearingliner

C.compressionplate

D.leadwire

53.Adistancepiece,withgroundfaces,knownasacompressionplate,maybe

interposedbetweentherodandthebeatinghousing,itsthicknessbeingchosento

ensurethecorrect.

A.compressionpressure

B.compressiontest

C.compressionratio

D.compressionclearance

54.Adistancepiece,withgroundfaces,maybeinterposedbetweentherodand

thebearinghousing,itsthicknessbeingchosentoensurethecorrect.

A.expansionratio

B.pressureratio

C.compressionratio

D.clearanceratio

55.Agovernorautomaticallycontrolsenginespeedbyregulating.

A.fuelsupply

B.firingorder

C.engineload

D.oillevel

56.Agudgeonpininatrunkpistonmaybefreetofloatandrotate,with

tolimitaxialmovement.

A.splitpins

B.crankpins

C.dipsticks

D.circlips

57.Aheaterinthecircuitfacilitateswarningoftheenginepriortoby

circulatinghotwater.

A.starting

B.stopping

C.tostart

D.tostop

58.Ahightemperaturealarmorwhichwillmeltisusedtoguardagainst

theexplosionofcompressorairpipelines.

A.aflametrap

B.areliefvalve

C.afusibleplug

D.aburstingcap

59.Ahotairstartpipeindicatesthatthereis.

A.inefficientcooling

B.aleakingairstartvalve

C.acloggeddrainvalve

D.aleakingairbottle

60.Alevelgaugeforatankisto.

A.givethepressure

B.givethecontents

C.givetheshapeofthetank

D.givetheaccuracylevel

61.Alubricantoftenhastoperformmanydutiesinanysituation,inaddition

toitsfundamentaljobof.

A.resistingoxidization

B-reducingfriction

C.promotingmovingspeed

D.developinginertia

62.Amainbearingconsistsoftwoshellswhicharesecuredbymeansofstuds

and.

A.tierods

B.throughbolts

C.leadwires

D.bearingcaps

63.Anumberofcylinderlinersareenclosedinonecastironcasingtoform

a.

A.cylindercover

B.cylinderblock

C.cylinderframe

D.bed-plate

64.Areductioninloadonadieselengineresultsinofspeedofthe

crankshaft.

A.areduction

B.anincrease

C.anouting

D.adownwards

65.Aseparatepistoncoolingsystemisusedanycontaminationfrompiston

coolingglandstothepistoncoolingsystemonly.

A.tohelp

B.tolimit

C.toprotect

D.toremove

66.Aseparatepistoncoolingsystemisusedtolimitanycontamination

pistoncoolingglandsthepistoncoolingsystemonly.

A.between,to

B.either,or

C.from,to

D.neither,nor

67.Asinglepiecefittedwithbronzeringsguidesthepistoninthe

cylinderliner.

A.pistonskirt

B.pistoncrown

C.guideway

D.cross-head

68.Avariablepitchpropellerismadeabosswithseparatebladesmounted

intoit.

A.of

B.upof

C?from

D.out

69.A:PleasetellmethespecificationsandquantityB:.

A.Pumpdieseloilfirst

B.300tonsof180cstfueloil

C.Thefigureisallright

D.OK,r11signit

70.Abouthalfanhourbeforetheengineisrequired,coolingwaterat

mustbecirculated.

A.morethantheworkingtemperature

B.lessthantheworkingtemperature

C.theworkingtemperature

D.thesameasthesurroundingtemperature

71.Accordingtothewaytheenergyoftheexhaustgasesisutilized,

pressure-chargingcanbedividedintotwomainsystems,namely,the

constant-pressuresystemand.

A?thepulse-phasesystem

B.thepulseDopplersystem

C.thepulsesystem

D.thepulseinterval

72.Acidsolutioninthesystemcanbetestedfromtimetotimebyputtingsome

ontoapieceoflime.

A.strength

B-dense

C.percentage

D.velocity

73.Additivesprotectivelayersonmetalsurfacesguardingthemagainst

corrosion.

A.damage

B?form

C.dissolve

D.contaminate

74.Adjustbymeansofleadwire.

A.theclearanceofthemainbearing

B.thediameterofmainbearing

C.thegapofmainbeating

D.thetoleranceofmainbearing

75.Administrationsshouldbearinmindthesignificanceofinmaintaining

safetyoflifeandpropertyatseaandinpreventingmarinepollution.

A.advancednauticalequipment

B.advancedperformancemainengines

C.emergencyequipment

D.communicationandlanguageskills

76.A-framesandcylinderblockisheldtogetherbytoformarigid

structure.

A.connectingrods

B.pistonrods

C.tierods

D.jack-bolts

77.A-framesaremountedonthebedplateandsupportandcylinderblock.

A.themainbearing

B.thecylindercover

C.theentablature

D.thesump

78.After"F.W.E."isgiven,theairsystemisshutdown,thegear

put

in,alldrainsandindicatorcocksopened,andthecoolingwaterkeptrunning.

A.steering

B-timing

C.turning

D.running

79.Afterensuringthattheiscorrectthebearingclearanceshouldbe

checked.

A.nap

B.g叩

C.nip

D.deflection

80.Afterfittingbackinplacethegearwheels,dontforgetthem.

A.togrease

B.greasing

C.oiling

D.lubricating

81.Afterpassingthroughtheturbinetheexhaustgasisconductedoutintothe

A.intercooler

B.compressor

C.cylinder

D.openair

82.Aftertheengineiswarned,weshouldtheturninggearbeforestarting

uptheengine.

A.takein

B.putin

C.takeout

D.putup

83.Aftertheorder""isgiven,theairsystemisshutdown,theturning

gearputin.

A.FinishedwithEngine

B.StoptheEngine

C.Stand-byEngine

D.Slow-downEngine

84.Aircocks,usuallypositionedattheinacirculatingsystem,isused

togetridoftheairinthesystem.

A.bendingjoint

B-expansiontank

C.weld

D.thehighestpoint

85.Alltheringsareslightlyroundedontheirexternaltopandbottomedges

tokeeptheoilfilmonthecylinderlinerduringfornewpistonrings.

A.therunning-inperiod

B.therunningprocess

C.gasexchangeprocess

D.theboilerfiring

86.Allthreesystemshavetheportstoswirltheincomingairanddirect

itintheappropriatepath.

A.angled

B.rounded

C.beingangled

D.beingrounded

87.Althoughthecrankshaftsofmediumdieselenginesappeartoberobust,they

relyonthesupportoftodeveloptheirfullstrength.

A.thepistonrods

B-thecrankthrows

C.thethrustbearings

D.themainbearings

88.Aluminumpistonshavecoefficientofthermalexpansioncomparedwith

thoseofcastiron.

A.higher

B.lower

C.thesame

D.noneoftheabove

89.Amongtheringsofapistontheoneissubjectedtothegreatestload

andtemperature.

A.bottom

B.middle

C.top

D.noneoftheabove

90.Analuminumpistonhaslowerinertiaandhighercoefficientofcompared

tothatofcastiron.

A.viscosity

B-twistingmoments

C.inertia

D.thermalexpansion

91.Anelectricallydrivenautomaticallyoperatingauxiliaryblowerisprovided

forslowspeedandofalowspeeddieselengine.

A.manoeuvringoperations

B.badcombustion

C.cooling

D.mooringtrial

92.Anincreaseinloadonadieselengineresultsinofspeedofthe

crankshaft.

A.areduction

B.anincrease

C.anouting

D.adownwards

93.Aninterlockintheremoteoperatingvalvelinestopsthevalvewhen

theengineturninggearisengaged.

A.toopen

B.opening

C.open

D.opened

94.Anoverspeedsafetydeviceisusuallyfittedtoageneratorenginefor

intheeventofoverspeed.

A.cuttingpowerofftheengine

B.increasingthefuelpumpsetting

C.brakingthecrankshaft

D.stabilizingtheshipspeed

95.Asaheatengine,energyisthesourceofpowerbywhichthediesel

enginecanbeoperated.

A.electric

B.heat

C.mechanical

D.exhaust

96.Asforadieselengine,lackofcombustionairmaybedueto.

A.foulingturbine

B.fuelpumpfaults

C.lubricationfailure

D-excessivecooling

97.Astheplungermovesup,theportsareclosedandthefuelanddelivered

totheinjectornozzleatveryhighpressure.

A.beingcompressed

B.tobepumpedup

C.ispressurized

D.arebuiltup

98.Atleastcylindersinfour-strokeenginewillbeconfiguredtoensure

thattheenginecanbestartedwiththecrankshaftatwhateverposition.

A.6

B.2

C.12

D.8

99.AtthetopoftheA-framesthereisastrongcastironframecalled.

A.cylinderliner

B.cylindercover

C.thegearbox

D-thescavengingbox

100.Besuretomaketheengineturnbybeforestartingandafterstopping.

A.steeringgear

B.turninggear

C.steeringwheel

D.turningcycle

101.Bearingknocksarelikelytooccurfrom.

A.lessclearance

B.dirtylubeoil

C.overload

D.bearingwear

102.Becausethecastingsofsmallerenginesarenotsobigandheavy,

andcylinderblockmaybemadeinonepiece.

A.thecolumn

B.thejacket

C.cylindercover

D.cylinderliner

103.Bedplatesaretheoftheengine,withoutthesupportofwhichthe

shaftalignmentinparticular,andenginestructureasawhole,wouldinevitablybe

lost.

A.hull

B.projection

C.graphitization

D.foundation

104.Before"stand-by"isrungontheenginetelegraph,itisusualto

givethe

mainengineaheadandastern.

A.abrieftrialwithturninggear

B.abrieftrialonpower

C.alongtrialbysteeringgear

D.oneminutestrialwithwindlass

105.Beforeamarinedieselengineisstartedthecylindersandpistonsmust

be.

A.cooledtoappropriatetemperature

B.warmedupgraduallytoappropriatetemperature

C.openedupandrenewed

D.groundandpolished

106.Beforebeingusedthefuelservicetankshouldbedrainedof.

A.sodasolution

B-mechanicalimpurities

C.ballast

D-waterandresiduals

107.Beforepumpingupthecrankcaseoil,shouldbeworkedbyhandto

minimizecorrosiveactionontheliners.

A.theindicators

B.thestartingvalves

C?thecylinderlubricators

D.theturninggear

108.Beforereplacingapistonyoushouldcheckthatallringsare.

A.free

B-fastened

C.broken

D.stuck

109.Beforereplacingapistonyoushouldchecktheringstoseethatall

clearancesandgapsarethepermissibletolerances.

A.above

B.at

C.over

D.within

110.Beforereplacingapistonyoushouldchecktheringstoseethatall

clearancesandgapsarewithinthepermissible.

A.deflection

B-discrepancy

C?error

D.tolerance

111.Beforestartingtheenginetheairbottleshouldbe.

A.pumpedup

B.loaded

C.discharged

D.opened

112.Beforestartingtheturninggear,shouldbeworkedbyhandtominimize

corrosiveactionontheliners.

A.theindicators

B.thestartingvalves

C-thecylinderlubricators

D.theturninggear

113.Blow-offofthereliefvalvesoftheenginescylindersmaybecausedby

A.toolowlead

B.waterinfuel

C.tootightspring

D.leakage

114.Blow-offofthereliefvalvesofthemaincylindersduringoperation

indicates.

A.thecylindercoveriscracked

B.theinjectorholesisclogged

C.thecamsarenotproperlyset

D.fuelpumpisleaking

115.Bridgegaugecanbeusedtomeasureofadieselengine.

A?diametersofjournals

B.deflectionsofcrankwebs

C.diametersofcrankpins

D.noneoftheabove

116.Careandcleanlinessarerequiredwheninstallingdieselfuelfilters.

A.topreventthefuelsystemfrombecomingair-hound

B.topreventthefuelsystembecomingcloggedwithdirtyparticles

C.bothoftheabove

D.topreventthelubricatingoilfromleakingoutofthefilterelement117.Cast

ironcarrierrings,machinedgrooves,areprovidedforallthe

pistons.

A.caulkedinto

B-caulkinginto

C.pressedinto

D.screwedinto

118.Chargingisthefillingoftheenginecylinderwithasupplyoffor

compression.

A?water

B.freshair

C.fueloil

D.gas

119.Chargingisthefillingoftheenginecylinderwithasupplyorchargeof

freshaircompression.

A.toneed

B-readyfor

C.wantto

D.goingtobe

120.Charging-airpressureincreasesifthereisincorrectcombustionanddrop

intheofthedieselengine.

A?machineefficiency

B.machineryefficiency

C.mechanicalefficiency

D.mechanicsefficiency

121.Compressedairissuppliedbyaircompressionto.

A.theairreceivers

B.thestartingvalves

C.thecylindercovers

D.thedistributors

122.Compressedairisusedonboardship.

A.forstartingdieselengines

B.inpneumaticcontrolsystem

C.inpneumatictools

D.Alltheabovearetrue

123.Constantcoolingthevariouscomponentsofdieselenginehasanumberof

functionsexceptfor.

A.goodlubrication

B.lowthermalstress

C.goodmechanicalproperties

D.acidcorrosion

124.Coolingenablestheenginemetalstheirmechanicalproperties.

A.toretain

B-toremain

C.tomaintenance

D.tohave

125.Coolingofengineisachievedbycirculationacoolingliquidaround

internalpassageswithinthe.

A.boiler

B.heater

C.engine

D-cooler

126.Coolingofenginesisachievedbyacoolingliquidaroundinternal

passageswithintheengine.

A.flowed

B.flowing

C.mixing

D.circulating

127.Coolingofenginesisachievedbycirculatingacoolingliquidaround

internalwithintheengine.

A.air

B.passages

C.pipes

D.means

128.Cracksincylinderandcylindercoversmayfromunequalheating.

A.make

B.cause

C.result

D.produce

129.Cracksinthecylindersandcylindercoversmayunequalheating.

A.resultfrom

B.resultin

C.giveout

D.givenfrom

130.Cracksinthecylindersandcylindercoversmayresultfrom.

A.lowspeed

B.unequalheating

C.lesslubricating

D-lowchargeairpressure

131.Crankshaftsofmediumspeedenginesarefromasinglepieceofsteel.

A.unusuallysolidwelded

B.neverbesolidforged

C.almostinvariablysolidforged

D.almostinvariablybewelded

132.Crossscavengingrequiresthefittingoftopreventairorexhaust

gasescapewhenthepistonisatthetopofthestroke.

A.aexhaustvalve

B.apistonskirt

C.apistoncrown

D.anairsuctionvalve

133.Cylinderlinercoolingisoftenreferredtoas.

A.pistoncooling

B.sleevecooling

C.centralcooling

D.jacketcooling

134.Cylindersofmarinedieselenginesarenormallycooledby.

A.seawater

B.finemineraloil

C.sanitarywater

D.freshwater

135.Dieselenginesarestartedbysupplyingintothecylindersinthe

appropriatesequencefortherequireddirection.

A.coolingwater

B.compressingair

C.compressedair

D.cylinderoil

136.Dieselenginesarestartedbysupplyingintothecylindersinthe

appropriatesequencefortherequireddirection.

A.fueloil

B.dieseloil

C.compressedair

D.jacketwater

137.Dieseloilmaybeusedtocoolofadieselengine.

A.cylinders

B.exhaustvalves

C.pistons

D.fuelvalves

138.Dirtinthefueloilsystemofadieselenginecancause.

A.cloggedfilters

B.poorcombustion

C.overloadingofthediesel

D.shockoffuellines

139.Dirtyoilmustbebeforebeingusedagain.

A.mixedwithcleanoil

B.purified

C.heated

D.strained

140.Doorsaregenerallyformedintheofthebothin-lineandVeeengines

togivemaintenanceaccesstothecrankshaftmainandconnectingrodlargeend

bearing.

A.bedplates

B.columns

C.cylinderblocks

D.safetycaps

141.Duetoactionofpistonssomerelativemotionbetweenpartsincontact

inthecoolantsupplyandreturnsystemmustoccur.

A.reciprocating

B-rotating

C.running

D.removing

142.During,thestartingairvalvesshouldbeclosedtopreventtheengine

fromturning.

A.overhaul

B.running

C.blowingdown

D.Alloftheabovearecorrect

143.Duringrepair,lubricationlinesandorificesmustbe.

A.takenaway

B.engaged

C.connected

D.sealedoff

144.Duringtheinspection,thestartingairvalvesshouldbeclosedthe

enginefromturning.

A.toincrease

B.tospeedup

C.toprevent

D.toreduce

145.Duringthesuctionstroke,thepistonismoving.

A.inwards

B.outwards

C.downwards

D.upwards

146.Duringworking,whenthepistonisnearthe,theairignitesthefine

sprayoffuel.

A.TDC

B.DTC

C.BDC

D.BCD

147.Eachcrankismadeupoftwocrankwebsjoinedbyacommontowhich

thebottomendbearingisfitted.

A.throw

B.crankshaft

C.crankpin

D.crosshead

148.Eachcylinderhasonestartingvalvewhichisusuallyopenedbyairpressure

andclosedby.

A.nutsandbolts

B.newjoints

C.springforce

D.sealingrings

149.Eachcylinderisclosedatthetopbya,madeofaspecial

heat-resistantsteel.

A.cylinderliner

B.couplingflange

C.cylindercover

D.pistoncrown

150.Eachcylinderlineronthemarinemediumspeedengines.

A.isusuallycooledbyseawater

B.canbereplacedwhenwornout

C.isindirectcontactwiththewaterintheboreofthecylinder

D.cantexpandwhenheated

151.Eachjournalandpinshouldbeexaminedforandgrooving.

A.bridges

B.recesses

C.rears

D.ridging

152.Eachpistonstuffingboxisprovidedwithtwosealingringsandthree.

A.packings

B.pistonrings

C.distributorrings

D.scraperrings

153.Eitheralowinjectionpressureoraleakageofpistonringsisableto

lead.

A.ahighexhausttemperature

B.ahighsmokyexhaust

C.ahighoutput

D.ahighcompression

154.Emulsionoilsandsodiumnitritearebothapprovedadditives,butthelatter

cannotbeusedifanypipesareorifanysolde