轮机英语复习题Word格式.docx
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轮机英语复习题Word格式.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
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