轮机英语复习题Word文件下载.docx

轮机英语复习题Word文件下载.docx

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6.Whichofthefollowingpumpsareself-priming,andcandealwithliquidfromalevelbelowthepump?

①.reciprocating;

②.rotary;

③.centrifugal.

A.①onlyB.①and②C.①,②and③D.②and③

7.Apositivedisplacementpumpisthatwherethevolumeofthepumpchamberisalternatelyincreasedto_____andthendecreasedto______.

A.drawtheliquidin/forcetheliquidoutB.forcetheliquidout/drawtheliquidin

C.suction/drawD.deliver/outlet

8.Heresomeoilintheoilywaterseparator,asaresultofitslower_______,willseparateandrise

intotheoilcollectionspace.

A.temperatureB.viscosityC.densityD.velocity

9.Inacompleteoil/waterseparator,moreoilwillseparateoutontotheundersideoftheseplates

andtraveloutwardsuntilitisfreetoriseintotheoilcollectingspace.What’sthemeaningof“it”

inthesentenceabove?

A.aseparatorB.oilC.waterD.anoilcollectingspace

10._______areusedtoensurethatshipsdon’tdischargeoilwhenpumpingoutoilywaterfrom

anyoilcontaminatedspace.

-----------------------------------------印刷边界，请勿越界-----------------------------------------

出卷人：

出卷日期：

教研室主任：

教务科长：

印刷份数：

A.BoilerB.IncineratorC.OilywaterseparatorD.Sewagetreatmentunit

11.Inanoilywaterseparatortheoilwilltravel________totheoilcollectingspaces.

A.upwardsB.downwardsC.outwardsD.forwards

12.Whenstarted,acompleteoilywaterseparatingunitisfirstfilled_______.Theoilywatermixtureisthenpumpedthroughtheinletpipeintothecoarseseparatingcompartment.

A.withdirtywaterB.withcleanwater

C.byoilywaterD.bymixedwater

13._____areusedforcargohandling.

A.CranesB.MooringwinchesC.WindlassesD.Foreman

14._____areusedtohandleanchorsandchains.

A.CargowinchesB.MooringwinchesC.WindlassesD.Cargohatches

15.Thedrivemotorwillhaveabrakearrangedtofail-safe,i.e.itwill_____theloadifpowerfailsormachineisstopped.

A.liftB.putC.takeD.hold

16._____areusedforhaulinginorlettingoutthewireswhichfastentheshiptotheshore.

17.Cargohandlingunitisratedaccordingtothe_____tobelifted.

A.cargocraneB.jibC.safeworkingloadD.oilpressure

18._____maybefittedforoperatingthederricktoppinglift（thewirewhichadjuststhederrickheight）.

A.AcapstanB.AholdC.AwarpendD.Amooringdrum

19.Inacompressionrefrigerationplanttherefrigerantisunderlowpressureinthe________andunderhighpressureinthe________.

Acompressor/condenserBcondenser/evaporator

Cthrottlevalve/evaporatorDevaporator/condenser

20.Theseincludedeckmachinerysuchasmooringequipment,anchorhandingequipment,cranesand_____.

A.boilersB.bowthrustersC.stabilizersD.hatchcovers

21.Inageneralcargocrane,threeprincipalmovementsare_____;

_____;

_____.

A.hoisting/luffing/slewingB.lifting/raising/lowering

C.rotating/raising/handlingD.hosting/lowering/moving

22.Hydrauliccranesmustbeproperlywarmed-upbeforebeingoperatedbecause_____.

A.warm-upallowsthehydraulicsystemtobecomechargedwithoil

B.warm-upallowsthereliefvalvestobeproperlytested

C.hydraulicstrainersoperateonlyduringthewarm-upperiod

D.hydraulicfluidmustbeattheproperviscosity

23._____istheproductionofpurewaterfromseawaterbyevaporationandre-condensing.

AEvaporationBCirculationCCondensationDDistillation

24.Whendistillingseawaterthecoolingwaterdischargingfromthedistillerisfedbacktoevaporatorasfeedwater___________.

AtodecreasescaleformationBforbettercoolingeffect

CformoreeconomicpurposeDtoraisevacuum

25.Waterevaporatesorsteamcondensesatthesaturationtemperature,whichdependsuponthepressure,thehigherthepressure,______________thesaturationtemperature.

AthemoreBthehigherCthelowerDthehighest

26.Morethanonestageofevaporationcantakeplacebyadmittingtheseawaterintochamberswithprogressively_________pressureintheflashevaporator.

AlowerBhigherCthelowerDthehigher

27.Inavacuumdistillationsystem,thecaseisthehigherthepressure,_____________.

AthesaturationtemperatureishigherBthehigherthesaturationtemperature

CthehigheristhesaturationtemperatureDthesaturationtemperatureismorehigh

28.Whenaflash-typeevaporatoristobesecuredforanextendedperiodoftime,theentireunitshouldbedrained,cleanedand___________.

AcompletelyfilledwithsaltwaterBfilledwithde-scalingcompound

CtightlyclosedtoexcludeairDventedtotheatmosphere

29.Whichofthefollowingstatementsiscorrectrelativetodistillationplantoperation?

ADistillationistheprocessofboilingseawatertoproducevaporwhichiscondensedintofreshwater

BEvaporationisthesecondpartofthedistillationprocesswherebrineisremoved

CBrineistheresultofcondensedseawatervapor

DDistillateistheproductresultingfromtheevaporationoffreshwatervapor.

30.Compressedairisusedonboardship__________.

AforstartingdieselengineBinpneumaticcontrolsystem

CinpneumatictoolsDalltheabovearetrue.

31.Aknockingsoundemittedfromanunloadedaircompressorisprobablycausedby______.

AdamagedintakevalvesBexcessivelytightmountingbolts

CinsufficientcylinderlubricationDaloosepiston

32.IfareciprocatingaircompressorhasaknockoccurringinfrequencywithitsoperatingRPM,

thecauseisprobably_______________.

AmisalignmentorwornmainbearingBinsufficientcylinderlubrication

CdefectiveorpoorlyfittedvalvesDalloftheabove

33.Anun-loaderisinstalledonanaircompressorto__________.

Abypassthehighpressurestagetothelowpressurestageon100%oftheaircompressorsinservice

Bpreventexcessiveinter-stagepressurebuildup

Ccontrolcompressordischargepressure

Dremoveallbutthefrictionalloadduringstarting

34.Toobtainmaximumefficiency,twostageaircompressorsareusually________________.

AhorizontallymountedBneverfittedwithintakefilters

CfittedwithintercoolersDoperatedinanunloadedconditionatalltimes

35.Aknockingsoundfromonecylinderofanoperatingaircompressorindicates__________.

Aadefectiveorbrokenhighpressureun-loaderBaloosevalveplate

CexcessivelyoverloadDnocompression

36.Ifanaircompressorisusedtosupplycompressedairtooutletsthroughouttheengineroom

andondeckofavessel,thesystemisknownasthe____________.

AcombustioncontrolairsystemBsupplyairsystem

CshipsserviceairsystemDlowpressuredeckairsystem

37.Ifanaircompressorisusedtosupplyairprimarilytothecombustioncontrolsystemandother

pneumaticcontrollers,theentiresystemisknownasthe____________.

AcontrolairsystemBforceddraftairsystem

CsupplyairsystemDshipsserviceairsystem

38.Whichofthefollowingproblemcanresultinbelownormalpressureintheintercoolerofan

operatinglowpressureaircompressor?

ADefectivepressurepilotvalve

BDefectivereceiverreliefvalve

CLeakingintakevalvesonthehighpressurecylinder

DLeakingdischargevalvesonthelowpressurecylinder

39.Excessivelylowairpressureoccurringintheintercoolerofareciprocatingaircompressoriscausedby______________________.

AleakydischargevalvesontheLPcylinderBleakydischargevalvesontheHPcylinder

CinsufficientintercoolercoolingDlowambientairpressure

40.Inacompressionrefrigerantplant,therefrigerantflowsfromtheexpansionvalveandthroughthe_______whereitabsorbsheatfromthespacebeingcooledandbecomesagasorvapor.

AcompressorBcondenserCthrottlevalveDevaporator

41.Theboilingandcondensationpointsofrefrigerantmainlydependonthe_______exerteduponit.

AtemperatureBdensityCvolumeDpressure

42.Inarefrigerationsystem,theamountofrefrigerantadmittedtotheevaporatorisdirectlyrelatedto____________.

AthecompressordischargepressureBcondensercoolingwatertemperature

CthesolenoidvalvetemperatureDthesuperheatoftherefrigerantinthetailcoil

43.Theheatusedtochangealiquidtoavaporiscalled_____________.

AlatentheatoffusionBlatentheatofvaporization

CspecificheatofvaporizationDlatentheatofthegas

44.Boththetemperatureandthepressureoftherefrigerantareincreasedinthe________.

AcompressorBcondenserCevaporatorDexpansionvalve

45.Thecompressorsuctionlineconveystherefrigerantvaporform__________to__________.

Acondenser/evaporatorBevaporator/compressor

Ccompressor/condenserDnoneoftheabove

46.Themainsteeringgearmustbeabletosteertheshipatmaximumaheadservicespeedandbe

capableatthisspeed,andattheship’sdeepest