单选810补文档格式.docx
《单选810补文档格式.docx》由会员分享,可在线阅读,更多相关《单选810补文档格式.docx(105页珍藏版)》请在冰豆网上搜索。
3Atthecompletionofthewatcheachmembershouldhandoverto_____,ensuringthatheiscompetenttotakeoverandcarryouthisdutieseffectively.
A.anoilerB.apumpmanC.hisreliefD.hisleader
4Increasingthetemperatureofafuelwillreduceitsviscosity,andvice-versa.Whatdoes'
vice-versa'
hereimply?
A.Decreasingthetemperatureofafuelwillincreaseitsviscosity.
B.Increasingtheviscosityofafuelwillreduceitstemperature.
C.Reducingtheviscosityofafuelwillincreasethetemperature.
D.Increasingthetemperatureofafuelwillincreaseitsviscosity.
5Amongthebasiccategoriesofequipment,whichofthefollowingsareusedtoallowthehydraulicenergytobecontrolled?
A.hydraulicpumpsB.valvesC.hydrauliccylindersD.hydraulicmotors
6ThevoltagesmostcommonlyadoptedforACsystemareeither440Vor220V_____.
A.two-phaseB.two-phraseC.three-phaseD.three-phrase
7Itiswellknownthatthewholepowerdistributionoftheship'
selectricalservicesmainlydependonthe_____.
A.sub-boardsB.mainswitchboards
C.emergencyswitchboardsD.distributionboards
8Innocaseshallballastwaterbecarriedin_____exceptonthoserarevoyageswhenweatherconditionsaresoseverethatitisnecessarytocarryadditionalballastwaterincargotanksforthesafetyoftheship.
A.ballasttanksB.oiltanks
C.segregatedballasttanksD.cleantanks
9Anelectricallydrivenautomaticallyoperatingauxiliaryblowerisprovidedforslowspeeduniflowand_____ofalowspeeddieselengine.
A.manoeuvringoperationsB.badcombustionC.coolingD.mooringtrial
10Fuelsofhighqualitywiththeirearlierignitionswillcausehigher_____pressureincylindersofadieselengine.
A.compressionB.maximumC.ratedD.oil
11_____areplayaveryimportantpartinhydraulicsystemsbypreventinginteractionbetweendifferentpartsofthehydrauliccircuit.
A.checkvalvesB.motors
C.safetyvalvesD.reducingvalve
12Theovercurrentrelay_____themotorcontactorwhenthemotorexceedsitsratedcurrent.
A.tripsB.connectsC.foulsD.destructs
13Thecentrifugeisaperfectlybalancedpieceofequipment,rotating_____,soallpartsshouldbehandledwithcare.
A.atlowspeed B.athighspeed
C.atmediumspeed D.Noneoftheabove.
14Thecentrifugalseparationoftwoliquidsresultsin_____.
A.theformationofacircularinterfacebetweenthetwo
B.theformationofacylindricalinterfaceamongthetwo
C.theformationofacylindricalinterfacebetweenthetwo
D.theformationofacircularinterfaceamongthetwo
15Withreferencetoanaxialpistonpump,whichoneofthefollowingstatementsiscorrect?
A.Thecylindricalbarreliscoupledtothemotor.
B.Thecylindricalbarrelhasanoddnumberofbores.
C.Theboresendinsockets.
D.Thesocketsfitintheswashplate.
16Ifthetemperaturerises,theoilwillbecomethinner,theamountthatleakwillbe_____andthesystemsunabletobuildupthepressurerequired.
A.increasingB.increasesC.decreasingD.decreases
17Thepurposeoftheevaporationisto_____.
A.absorblatentheatofvaporization
B.absorblatentheatoffusion
C.transferlatentheatofvaporization
D.transferlatentheatoffusion
18Theprincipleofmechanicalrefrigerationis_____.
A.theconversionofaliquidtoagas
B.theabsorptionoftemperatureunderheat,pressure,compressionandexpansion
C.thecompressionofaliquidundertemperatureandexpansion
D.theabsorptionofheatundertemperature,pressure,compressionandexpansion
19Ifasingle-phasemotorrunsslowerthannormal,thecausemaybe_____.
A.voltagehighB.underload
C.startingwindingcutoutD.groundedstator/rotorcoils
20Switchboardmaybeopenfrontordeadfront.Inthecaseof_____,allthemovingormovableparts,switch-gear,circuitbreaker,contactors,etc.,aremountedbehindtheboard,whichmerelyshowstotheobserveraseriesofplainlevelswithvoltmeter,
A.thefrontB.thebehindC.theformerD.thelatter
21Cage-typeinductionmotorshaveaverypoorpowerfactorwhichmaybeaslowas0.3-0.4when_____.
A.startingB.runningC.athighspeedD.atfullload
22Thermocouplescanbeusedoverarangeoftemperaturefrom–25to+65andarecommonlyfoundin_____.
A.coolingwatertemperaturemeasurementB.lubeoiltemperaturemeasurement
C.iceroomtemperaturemeasurementD.