輪機(jī)英語(yǔ)考試（海事局審核）題庫(kù)（含答案）

（新版）輪機(jī)英語(yǔ)考試（海事局審核）題庫(kù)（含答案）

一、單選題

1.Weneedashorecranetoshifttheengineashore.()

A、Pleasearrangeacranefortheengineshifting.

It'sdifficulttoshifttheengineashore.

C、Ashorecraneisquiteabigmachine.

D、It^hardtofindashorecrane.

答案：A

2.Thesmal

lendoftheconnectingrodisattachedtothepistonwitha.()

A、crankpin

B、slidingwedge

C、wristpin

D^torquebushing

答案：C

3.WhichofthelistedpumpsisNOTapositivedisplacementpump?()

A、Centrifugal

B、Reciprocating

C、Gear

D、Rotary

答案：A

4.alIowsfbrexpansionandwatermakeupinthewatercoolingsystem.()

A^Asettlingtank

B、Aheadtank

C\Aheadvalve

D、Adraintank

答案：B

5.Ithasanoutputof7350kwatl25i*pm.()

A、Itspoweris7350kw.

B、Itsratingspeedisl50rpm.

C、Itcandevelop1OOOOhorsepoweratl25rpm.

D、ItsoutputisaIways7350kw.

答案：C

6.I

nsomedesignsthecylinderoiIistimedsothattheoilinjectsonlyonthe

0

A、pistoncrown

B、pistongroove

C>pistonskirt

D、pistonringbel1

答案：D

7.isamachinebywhichelectricalenergyistransformedintomechanicalen

ergy.0

A、AnaItemator

B、Anelectricmotor

C>Adieseiengine

D、Amainswitchboard

答案：B

8.Intakeairflowfromadieseiengineturbochargerisdirectlyproportionaltoe

ngine_.0

A、exhaustgaspressure

B、exhaustgastemperature

C、speed

D、load

答案：D

9.Theby-productsofbxidation,asaresultofwatercontaminationofhydraulico

iI,aregenera11y_.()

A、removedbycellulosetypefiIters

B、gums,varnishes,andacids

C>aIwaysneutralizedbyoiIadditives

D、harmlessandhavenoeffectonsystemponents

答案：B

10.The

latentheatofevaporationisdissipatedintheinapressionrefrige

rationsystem.O

A、evaporator

B、condenser

C、expansionvalve

D、pressor

答案：B

11.1wanttoknowwhatdiscountyouusuallygive.()

A>Howmanypiecescanlget?

B、Howmuchdiscountcanlget?

C、Howcanlcounttheamount?

D、Howabouttheprice?

答案：B

12.Weshallarrangefbrovertimeworktomorrownight.()

A、Weshallarrangefbrovertimeworkthisnight.

B、Weshallarrangeforsomeworknextnight.

C\Weshallarrangeforovertimeworklastnight.

D、OvertimeworkshalIbean*angedtomorrownight.

答案：D

13.isthecirculationandrefreshingoftheairinaspacewithoutnecessari

Iyachangeoftemperature.()

A>Refrigeration

B、Airconditioning

C、VentiIation

D、Heating

答案：c

14.Youwanttohavethemainenginesuperchargerandtheaircoolerrepaired.()

A、YouwiIIrepairthemainenginesuperchargerandtheai

rcoolerbyyourself.

B、You'verepairedthemainenginesuperchargerandtheaircooler.

C、Youwantsomeonetorepairtheenginesuperchargerandtheaircooler.

D、Youwantsomeonetorepairthemainengine.

答案：C

15.Thevesselwasseriouslydamagedinengineroom.()

A、Engineroomsustainedseveredamage.

B、Vesselencounteredbadweathercausingseriousdamage.

C、Vesselwasinsafetyinspiteofengineroomdamage.

D、DamagesustainedtovesseFsengine.

答案：A

16.Thereare3cracksonbacksideofsewagetank.()

A、Thesewagetankiscracked.

B、The3cracksofsewagetankareverybad.

C、Thecracksofsewagetankarebackedup.

D、Thepipeofsewagetankiscracked.

答案:A

17.Theresistancetothemovementoftheglobuleinoilywatermi

xturedependsonitssizeandthe___ofthefIuid.()

A、pressure

B、velocity

C>gravity

D、viscosity

答案：D

18.Thefunctionofasafetyvalveonamarineboileri

stopreventthepressureintheboiIerfromi*isingabove_.()

A、designtestpressure

B、maximumallowableworkingpressure

C、thepressureusedintheaccumulationtest

D、thehydrostatictestpressure

答案：B

19._______Inanydieseiengineclosedfreshwatercoolingsystem,thelowestpressureex

istsatthe__.()

A、jacketwateroutlet

B、coolingwateq)umpoutlet

C、heatexchangeroutlet

D、expansiontankatmospherievent

答案：D

20.TherearesomespeciaItooIsfordockingrepair.()

A、Sometoolsarenecessaryfortheship*srepair.

B、Sometoolsarenecessaryfordockingrepair.

C、SomespeciaItooIsarenecessaryfbrdockingrepair.

D>SomespeciaItooIsarenecessaryfbrtheship'srepair.

答案：c

21.Inaboilerthehotgasesfromthefurnacepassthroughthetubeswhilethe

waterisontheoutside.()

A、water-tube

B、fire-tube

C、exhaustgas

D、NoneoftheotherChoicesistrue

答案：B

22.PIeaseringthisfirmup.()

A、PIeasesigntheform.

B、PleasemakeaphonecalItothisfirm.

C>PleasefiIlupthisfbrm.

D、Pleasecallonthisfirm.

答案：B

23.ViscosityofanoiIisameasureofits

,0

A、weight

B、internalfriction

C、demulsibility

D、S.A.E.number

答案：B

24.YoushouIdtakesoundingofthebiIgetank.()

A、Howisthebilgesystem?

B、Isthebilgesystemingoodorder?

C\DoesthebiIgesystemsoundwelI?

D、Youshouldmeasurethelevelofthebilgetank?

答案：D

25.Largepi

pesordown-ersarefittedbetweenthesteamdrumandtoensurego

odnaturaIcircuIationofwater.()

A、fire-tubes

B、furnaces

C、waterdrums

D、waterwalItubes

答案：c

26.Onopp

ositeendsofasingleshaftofaturbo-blowerareagasdrivenandan

airpressor,whichareseaIedeachother.()

A、chargeairreceiver

B、scavengingairbel1

C、turbine

D、aircooler

答案：c

27.Anaccidentalpathoflowresistance,aIlowingpassageofabnormal

amountofc

urrentisknownasa/an_.()

A、opencircuit

B、shortcircuit

C^polarizedground

D、groundreferencepoint

答案：B

28.Pleaseshowmetherecordofyourlastintemalaudit.()

A、Iwouldliketohavealookattherecordofyourlastintemalaudit.

B、Iwouldliketohavealookattherecordofyourlastannualsurvey.

C、Iwouldliketohavealookattherecordofyourlastbunkering.

D、IwouldliketohavealookattherecordofyourlastspeciaIsurvey.答案：A

29.Thewiresshouldbecorrectlyconnectedtoassurethecorrectphasesequence.

A、Afterconnectingthewires,pleasechecktheload.

B、Afterconnectingthewires,pleasechecktheswitchboard.

C、Afterconnectingthewires,pleasecheckthephasesequence.

D、Afterconnectingthewires,pleasechecktheresistance.

答案：C

30.Ihadreadyourapplicationformtwodaysbefore.()

A、Ihadreadyourapplicationformfourdaysbefbre.

B、Ihadlookedyourapplicationfbrmthreedaysbefore.

C、Ihadreadyourapplicationformthedaybefbreyesterday.

D、Ihadrememberedyourapplicationformthreedaysbefore.

答案：c

31.Thepumphasaconstantstrokeandtheamountoffueldeliveredi

sregulatedbyrotating__speciaIlyarrangedhelicalgroovecutintoit.()

A、thepumpcylinder

B、thepumpcam

C、thepumpplunger

D、thepumpmiIer

答案：c

32.ISMCodeisashi

pmanagementsystemembracingqualitycontrolintheareasofsafetyandpolluti

onprevention.11isapplicableto.()

A、Tugs

B、Yachts

C、cruiseship

D、anyvessel

答案：D

33.ThefrequencyofanAC

generatoriscontrolledbythe.()

A、rheostat

B、governor

C、exciter

D、capacitor

答案：B

34.Whenanengineisstartingandhasgotasufficientlyhighspeed,

sayabout20rp

m,_.0

A、thestartingairsupplyiscutoffandfuelisinjectedintothecylinders

B、thefuelfeedingiscutoffandthetuminggearisputin

C>thestartingairsupplyiscutoffandthetuminggearistakenout

D、theelectricblowerisshutdownandfuelisinjectedintothecylinders

答案：A

35.Inanoilywaterseparatortheo

iIwiIltraveltotheoilcoIlectingspace

s.0

A、upwards

B、downwards

C、outwards

D、forwards

答案：A

36.Asfbranoi1-fi

redboiIer,toomuchairwouIdindicatedby.()

A、yeIlowishflame

B、goIdenyellowflame

C>miIkyflame

D、briIliantwhiteflame

答案：D

37.Thesparepartsorderedhavenotbeendeliveredonboardintime.Q

A、Thesparepartshavebeenorderedbutnotdeliveredasexpected.

B、Thesparepartshaven^beenordered.

C、Thesparepartsorderedhavebeendeliveredonboai,d.

D、Thesparepartsorderedhavebeendeliveredonboardintime.

答案:A

38.Aci

rcuitbreakerandafusehaveabasicsimiIarityinthattheyboth.()

A、canberesettoenergizethecircuit

B、shouldopenthecircuitwhenoverloaded

C>wiIIbumoutwhenanovercurrentflowdevelops

D、shouldshortthecircuitwhenoverloaded

答案：B

39.Themainenginegovernorismaintainedinstri

ctaccordancewiththemanufacturerinstructionsand___requirements.()

A、cleanregularly

B、plannedmaintenance

C、renewalintervals

D、checkmonthly

答案：B

40.Ifitisreallybeyondpatching,justrenewit.()

A>11^beyondpatching.

B、Ifyourenewit,weneedn'tpatchit.

C、Youmaynotrenewit.

D、Renewit,ifnecessary.

答案：D

41.Avoltme

terispositionedacrossthebus-barstoindicatetheir.()

A、current

B、voltage

C、power

D、resistance

答案：B

42.Accordi

ngtoMARITIMELABOURCONVENT10N2006,ofseafarersundertheag

eofl8shalIbeprohibited.()

A、Nightwork

B、Hotwork

C、Highplacework

D^WeIdwork

答案：A

43.Priortoanyoverhaulworkonelectricequipment,itis

importanttoensurethecircuitsare.()

A>live

B、dead

C、excited

D、online

答案：B

44.Ourofficehoursarefrom07:00am.tol6:00hours.()

A、Wework8hoursaday.

B、Wecanebackafter4p.m.

C、Wemaygotoworkat8am.

D、OurofficeisopenalItheday.

答案：B

45.Onmostmodemdieseiengines,themainandconnectingrodbearingsrecei

vethe

irIubricatingoiIby_.()

A、banjofeed

B、splashfeed

C、gravityfeed

D、pressurefeed

答案：D

46.1thinkalIcrewshaveagoodknowIedgeofMARPOLconvention.()

A、AIIcrewsmusthaveagoodknowIedgeofMARPOLconvention.

B、AlIcrewshavealittleknowledgeofMARPOLconvention.

C>NobodyknewMARPOLconvention.

D、AIIcrewshaveunderstoodMARPOLconvention.

答案：D

47.Sealingbetweenthecrankcaseandscavengingairboxesisachi

evedbymeansofthepistonrodlocatedinthebottomofthescavengingairboxes.()

A、stuffingboxes

B、gland

C、sealingring

D、baffle

答案：A

48.Butthismorningthepainsbeefrombadtoworse.()

A、Thismorningthepainsbeebad.

B、Thismorningthepainsgotbad.

C、Thismorningthepainsdisappear.

D、Thismorningthepainsaregettingworse.

答案：D

49.Damagerepairsarenecessaryforashipwiththeresultofcollision,groundin

gand.0

A、blackout

B、minorfire

C、flooding

D、maingeneratorfailure

答案:c

50.BunkeringshalIbeterminated

ifthereisa.①severeelectricalstorm

②fireonthepier③fireontheship()

A、?

B、③

C、②③

答案：D

D、①②③

51.Eachcylinderisdosedatthetopbya

madeofaspeciaIheat-resistantste

el.O

A、cylinderliner

B、couplingflange

C、cylindercover

D、pistoncrown

答案：C

52.Iwanttoknowwhetheryouhaveanydifficultyinsupplyingthem.()

A、Isitdifficulttorepairthem?

B、Isitdifficulttocheckthem?

C、Isitdifficulttosupplythem?

D、Isitdifficulttopaintthem?

答案：C

53.Hoursofrestmaybedividedintonomorethantwoperiods,oneofwhichshal

Ibea

11east_hoursinlength,andtheintervalbetweenconsecutiveperiodsofrestsha

答案：B

11notexceedhours.()

A、6/12

B、6/14

C、8/12

D、8/14

答案：B

54.Astheamountofmoistureintheairi

ncreases,thedifferencebetweenthedrybulbandwetbulbtemperatureswi11.()

A、increase

B、decrease

C、remainunchanged

D、begreatestatdewpoint

答案：B

55.1amgoingtoanaIyzethefreshcooIingwater.()

A、lamgoingtotestthecoolingfreshwater.

B、lamgoingtotestthecoolingpistonoiI.

C、lamgoingtotestthecoolingfueloil.

D、lamgoingtotestthecoolingseawater.

答案：A

56.Engine_referstotherelativetimeofpositionofcrank,atwhi

cheachoperationduringthecycleismencedandispleted.()

A、timing

B、deviation

C、firingorder

D、phase

答案:A

57.Everythingisinorder,wewi11givemainengineabrieftria1.()

A、Weshouldtrymainenginebeforeeverythingisgood.

B、TrythemainenginetomakesureeverythingisalIright.

C\Wedidn*thavemainenginetriedonlytofindthateverythingwasOK.

D、Wedon'ttrytheengineuntiIeverythingisverywelI.

答案：D

58.IwiIIrenewtheremotecontroIvalveofNo.4cranebecausethesealingconditi

onofthevalveispoor.()

A、TheremotecontroIvalveofNo.4craneisgood.

B、Thesealingconditionofthevalveispoor.

C、TheremotecontroIvalveofNo.5craneisfaulty.

D、TheremotecontroIvalveofNo.6craneisfaulty.

答案：B

59.Thefueloi

Isusedintoday'sdieseienginesareproducedfrom.()

A、heavyfueloil

B、crudeoiIsources

C、dieseloil

D、bunkerfueloiI

答案：B

60.Iwanttoknowwheretheshoreconnectionboxis.()

A、Whereistheshoreconnectionboxmade?

B、IMliketoknowthelocationoftheshoreconnectionbox.

C>Wherecanlgettheinformationaboutthebox?

D、Howabouttheworkingconditionoftheshoreconnectionbox?

答案：B

61.Theoperationof___twoaltematorsrequi

resthevoltagestobeequalandalsoinphase.()

A、paraIleling

B、series-mounting

C、running

D、control

答案：A

62.Thischemicalsolutioncan^beusedtocleantheintemalpartoftheboiler.

0

A、Theexternalpartoftheboilercan'tbecleanedbythischemicalsolution.

B、Thischemicalsolutioncan'tbeusedtocleantheexternalpartoftheboiler.

C、Thischemicalsolutioncanbeusedtocleantheextemalpartoftheboiler.

D、Theintemalpartoftheboilercan'tbecleanedbythischemicalsolution.

答案：D

63.ThemainaimofistoremovefueIcontaminants-notabI

ywater,cataIystfines,abrasivegritandsodiumfromseawater一一

thatcancauseexcessivewearwhenbumedintheengine.()

A、oilywaterseparator

B、centrifugalseparators

C、finefilter

D、incinerator

答案：B

64.Ihopethetimeforpletioncanbeshortened.()

A、11dliketoshortentherepairtime.

B、11dliketocutdowntherepairexpenses.

C、11dliketocancelsomerepairiterns.

D、Fdliketostoptherepair.

答案：A

65.0nepipelineis6inchesindiameterforheavyoilandtheotheris4i

nchesfordieseloi1.()

A、Thereare6pipelinesinalI.

B、Thereare4pipelinesinalI.

C>Thereare2pipelinesinalI.

D、Thereisonlyonepipeline.

答案：c

66.Tocontroladeviceorsystem

istoadjustorvarywhichaffectit.()

A、thestructures

B、thelines

C>theparameters

D、thelocation

答案：C

67.After”FWE”isgi

ven,theairsystemisshutdown,thegearputin,a11dr

ainsandindicatorcocksopened,andthecoolingwaterkeptrunning.()

A、steering

B、timing

C、turning

D、running

答案：C

68.Ifavess

elissteamingatasteadyrate,andthewaterleveIhasdroppedoutofcightinthebo

ilergageglass,theFIRSTcorrectiveactionshouldbeto.()

A、openthefeed-waterbypassregulator

B、blowdowntheboilergaugeglass

C、slowdowntheengines

D、cutoutthefires

答案：D

69.Acentri

fugearrangedtoseparatetwoIiquidsisknownas.()

A、anoilywaterseparator

B、apurifier

C、acentrifugalpressor

D、aclarifier

答案：B

70.hasasimuItaneoussuctionactionanddischargeaction.()

A、ThesingIeactingdisplacementpump

B、theCentrifugalpump

C、Thedoubleactingdisplacementpump

D、theGearwheelpump

答案：C

71.IfausedlubeoiIanalysisindicatesanexcessivechromatecontent,thi

smean

s.0

A、airfiltrationisinadequate

B、enginecoolantisleakingintothelubeoiI

C>fueloilisleakingintothelubeoiI

D、thepistonringsareexcessivelyworn

答案：B

72.isthecirculationandrefreshingoftheairinaspacewithoutnecessari

Iyachangeoftemperature.()

A、Refrigeration

B、Airconditioning

C>VentiIation

D、Heating

答案：C

73.11dliketoknowsomethingaboutrepairforauxiliaryengine.()

A、Iwanttoknowrepairprogressoftheauxiliaryengine.

B、Therepairingoftheauxiliaryengineissomething.

C>YourrepairoftheauxiliaryengineiswelIknown.

答案：A

D、Iliketorepairyourauxiliaryengine.

答案：A

74.Under

ISMCode,theshiptowhichitapplieshastocarry.()

A、anInternalionalShipSecurityCertificate

B、anIntemationalOiIPollutionPreventionCertificate

C、aSafetyManagementCertificate

D、anIntemationalBaIlastWaterManagementCertificate

答案：C

75.Astheamountofmoistureintheairi

ncreases,thedifferencebetweenthedrybulbandwetbulbtemperatureswi11.()

A、increase

B、decrease

C>remainunchanged

D、begreatestatdewpoint

答案：B

76.Howtidyandcleantheengineroomlooks!()

A、Howdirtytheengineroomis!

B、Whatatidyandcleanengineroom!

C、Whereistheengineroom?

D、Howtheengineroomlookslike!

答案：B

77.Thehighlimitalarmoftheexhausttemperatureisonnow.()

A、Nothingshouldbedoneinsuchcase.

B、Theexhausttemperatureisnormalnow.

c、Theexhausttemperatureisdroppinggradually.

D、Theexhausttemperatureisabnormal.

答案：D

78.PleasemakepreparationsforannuaIsurvey!()

A、Wearesubjecttoannualsurvey.

B、PreparationsforspeciaIsurveyhavetobemade.

C、NothingshouldbepreparedfbrannuaIsurvey.

D、Somethingshouldbepreparedforintermediatesurvey.

答案：A

79.STCWConventionstatesthattheofficerinchargeoftheengineeringwatchi

sthe___representative.()

A、ship-ownefs

B、master's

C>chiefengineer's

D、manager's

答案：C

80.PIeasete11mewhereyoursecuritycertificateis.()

A、Imayhavealookatyoursafetycertificate.

B、ImayhavealookatyourOiIRecordBook.

答案：c

C、Youshouldshowmeyoursecuritycertificate.

D、YoushouIdshowmeyourlOPPcertificate.

答案：c

81.The_shouldbekeptrunningforabouthalfanhourafterFW.E.O

A、themainlubricatingoiIpump

B、fueloilpump

C、airpressor

D>auxiliaryblower

答案：A

82.OnoIderships,temperaturemaintenancecanbemadeeasierbyincreasingthe

ofrecircuIatedtofreshair.()

A、rate

B、ratio

C、percentage

D、permi11age

答案：B

83.ThefrequencyofanAC

generatoriscontrolledbythe.()

A、rheostat

B、governor

C、exciter

D、capacitor

答案：B

84.YoushouldtelImehowlongitwiIItaketopletethiswork.()

A、Areyougoingtofinishitintwodays?

B、DidyoutelIthesurveyorabouttheschedule?

88.YoushouldhavethoughtaboutdischargingoilsludgetoshorereceptionfaciIiti

es.()

A、YoushouldhavedischargedoiIsludgetoshorereceptionfacilities.

B、YoushouldhavedischargedoiIsludgeoverboard.

C、YoushouldhaveconsidereddischargingoiIsludgetoshorereceptionfaciIiti

es.

D>Youshouldhavethoughtaboutbumingoilsludgeonboardship?

答案：c

89.W

henseparatinglubeoilinpurifier,theoptimalseparatingquantityis

_oftheratedquantityonnameplate.()

A、100%

B、1/2

C、1/5

D、1/3

答案：D

90.Duringtoppingoffbfbunkertanks,theloadingratemustbepersonallysuperv

isedbythe_.()

A、terminaloperator

B、person-in-charge

c、master

D、chiefengineer

答案：B

91.No.3generatomeedssomerepairfromtheshipyard.()

A、Theshipyardneedssomehelp.

B、TheshipyardneedsrepairingNo.3generator.

C、TheshipyardwiIIrepairNo.3generator.

D、11isnecessaryforustogethelpfromtheshipyard.

答案：C

92.Thesafetyvalvesaremountedinpa

irstotheboileragainstoverpressur

e.0

A、use

B、reIease

C、protect

D、effect

答案：C

93.No.1generatorhasbeenrunningfbr3000hrswithoutbeingchecked.()

A、No.1generatorisbeingchecked.

B、No.Igeneratorhasn'tbeeninspectedfor3000hrs.

C>No.1generatorshouldn^becheckedwhiIeitisrunning.

D、No.1generatorhasn'tbeeninspectedfor2000hrs.

答案：B

94.PIeaseshowmeyourIOPPcertificate.()

A、IwanttohavealookatyourlOPPcertificate.

B、IwanttotakeoveryourlOPPcertificate.

C、IwanttoissueyourlOPPcertificate.

D、IwanttoextendyourlOPPcertificate.

答案：A

95.Oilywaterseparatorsareusedtoensurethatshipsdon'tdischargeoi

Iwhenpumpingout_.()

A、baIlastwater

B、boilerwater

C、bilgewater

D、sewagewater

答案：C

96.Th

eofficerinchargeoftheengineeringwatchshallensurethatalImachineryinvolvedwi

ththemaneuveringoftheshipcanimmediatelybeplacedintheof

operationwhennotifiedthattheshipisincongestedwaters.()

A、manualmode

B、automaticmode

C、remotemode

D、follow-upmode

答案：A

97.The____isusedtomeasurethevolumeofaliquidorgasthroughapipeli

newithinanygivenperiodoftime.()

A、flowmeter

B、viseter

C、micrometer

D、feeIer

答案：A

98.Onehourbeforeshipsailing,thedutyengineerandofficershouldcheck

together.()

A、mainenginetachometerandenginetelegraph

B、allkindsofoilandwaterreserves

C、clock、enginetelegraphandtesttherudder

D、crews

答案：C

99.Brinedensityi

nadistiIlingplantismeasuredwitha/an.()

A>psychrometer

B、salinometer

C、anemometer

D、sphygmomanometer

答案：B

100.Thecoastguardhelicopterhasfbundabigoilslickonthewatersnearyourshi

p.0

A>Yourshipisbeingbunkered.

B、YourshipisunloadingoiI.

C、Yourshipissuspectedtodischargeoilywateroverboard.

D>Yourshipissuppliedwithsomewater.

答案：C

101.ThefigurethatthevolumeofairatBDCisdividedbythevolumeofai

ratTDCistermedas_.()

A、ignitionratio

B、powerratio

C、pressionratio

D、injectionratio

答案：C

102.YoumaysuppIyoiIspi11dispersantchemicaIs.()

A、YoutellmewhereoilspiIIdispersantchemicalsare.

B、YouexplainoiIspiIIdispersantchemicalsforme.

C、YouhaveoiIspiIIdispersantchemicalsathand.

D、YouknowoiIspiIIdispersantchemicals.

答案：C

103.WewiIIbefinedifthesulphurcontentisoverl.5percent.()

A、Ifthewatercontentisoverl.5percer)t,wewiIIbefined.

B、WewiIIbefinedifthesulphurcontentexceedsl.5percent.

C、Thesulphurcontentisnotoverl.5percentbecausewehavebeenfined.

D、WewiIIbefinedifthesulphurcontentdoesn'texceedl.5percent.

答案：B

104.Aclosedfreshwatercoolingsystemismonlyusedwithmarinediesei

enginesbecausethe_.()

A、needforwatertreatmentiseliminated

B、coolingwatertemperaturedifferentialisgreater

C、coolingwaterpumpsaredirectlyreversible

D、jacketwatertemperatureismoreeasilycontrolled

答案：D

105.Youwi11sureIygetthemontime.()

A、rmsureyoucangetthemontime.

B、ThetimeissuitabIe.

C>Youcan'tgetthemasyouwish.

D、Youmustmakesureofthetime.

答案：A

106.Thefueloi

ItransferpumpsaregeneraIlypumps.()

A>injector

B、centr