船舶电气与船舶安全.ppt

第三章船舶电气与船舶安全1886Thestaringcurrentofana.c.motoris_theratedcurrent.交流电机的启动电流比额定电流大得多。A.thesameasB.muchlargerthanC.lessthanD.equals1887Ammeteristomeasurethe_安培表用来测量电流。A.currentB.voltageC.powerD.frequencyInamodemthree-phaseA.C.synchronousbrushesgenerator,theexcitationwindingisontherotor.Thatmeans_对于现代三相交流同步有刷的发电机，励磁线圈在转子上。意即转子上的线圈用于输入励磁电流。A.ThegeneratorneednotexcitationB.ThewindingontherotorisforinputtingexcitationcurrentC.TherearethreephasewindingsontherotorD.Thegeneratorhasbrushes1889Theovercurrentrelay_themotorcontactorwhenthemotorexceedsitsratedcurrent.当电动机超过额定电流时，过电流继电器将跳开。A.connectsB.tripsC.foulsD.destructs1886B1887A1888B1889B,The_isameasureofthephasedifferencebetweenvoltageandcurrentandisexpectedasthecosineofphaseangle.功率因数可用来表示电压与电流之间的相位差，表达成相位角的余弦。A.powerB.efficiencyC.effectivepowerD.powerfactor1891Currentchangingindirectionandrisingandfallinginvalueis_方向、大小都变化的电流是交流电。A.A.C.B.D.C.C.generatorD.freshwatergenerator1892Theoperationofparallelingtwoalternatorsrequiresthevoltagestobe_andalsoinphase.两台交流发电机并联，需要电压相等，并且同相。A.zeroB.eliminatedC.differentD.equal1893The_,cagerotorinductionmotoristhefirstchoicemarinemotorinmostmodemshipsbecauseofitselectricalandmechanicalsimplicity.现代船舶上使用的电机都是三相电机。A.singlephaseB.twophaseC.threephaseD.fourphase1894Thestar-deltastarterisaneffectivemethodof_voltagestartingofamotor.采用Y启动器是电饥低电压启动的最好方法。A.increasedB.reducedC.unchangedD.Noneoftheabove1890D1891A1892D1893C1894B,Witha_loadthevoltageandcurrentareinphase.对于纯电阻负荷，电压和电流同相。A.purelyresistanceB.capacitiveC.inductiveD.Noneoftheabove1896Increasingthetemperatureofafuelwill_itsviscosity.提高燃油的温度将降低其粘度。A.increaseB.reduceC.keepD.Noneoftheaboveistrue.1897The_isusedtomeasurethevolumeofaliquidorgasthroughapipelinwithinanygivenperiodoftime.流量计用于测量在给定时间内，通过管子的液体或气体的体积。A.flowmeterB.viscometerC.micrometerD.feeler1898gaugepressuremeans_“表压”即是“超过大气压的压力”。A.vacuumB.theexcessofpressureaboveatmosphereC.figureonagaugeD.Anyoftheabove1899Amanometerisusedtomeasure_压气计用来测量压力。A.pressureB.temperatureC.volumeD.specificgravity1900Theviscosityregulatorcontrolsthefueloiltemperature_provideoilatthecorrectviscosityforcombustion.粘度调节器通过控制燃汕的温度实现粘度的控制。A.inorderthatB.becauseofC.inordertoD.owingto1895A1896B1897A1898B1899A1900C,Aviscosityregulatorusedforanengineisusuallyprovidedinordertoforan_engineburningheavyfueloil.柴油机的粘度调节器能保持燃油粘度恒定。A.regulatethefuelsupplyB.maintainaconstantfuelviscosityatthefuelvalvesC.maintainefficientcoolingD.alterthefueldensity1902Oilmistdetectorsareusuallyusedonboardtodetectoilmistdensitywithin_大型低速柴油机上的油雾检测器用于检测曲柄箱内滑油蒸汽的存在。A.theenginecrankcaseB.theenginescavengeboxesC.draintanksD.fueltanks1903UMSstandsfor_UMS代表“无人机舱。A.ultramuchspaceB.universalmediumsystemC.unitmachinedspaceD.unattendedmachineryspace1904Themaingeneratorsareconnectedto_主发电机与主配电板相连。A.distributionboardsB.sectionboardsC.emergencyswitchboardsD.mainswitchboards1901B1902A1903D1904D,1905Theemergencygeneratororemergencybatteryisconnectedto_onmostlargeships.应急发电机或应急蓄电池与应急配电板相连。A.distributionboardsB.sectionboardsC.emergencyswitchboardsD.mainswitchboardsSwitchboardsmaybeofthedead-fronttypeinwhichalllivepartsareinstalledbehind_andonlytheoperationhandlesandinstrumentsareonthefront在表面不带电式的配电板中，带电部件安装在面板的后面，只有操作手柄和仪表在前面。A.thecapstanB.thecollectorC.thepanelsD.thesurface1907Remotecontrolmeansthat_遥控，意即“系统位于远离操作者处”。A.thesystemismannedmanuallyB.thesystemissituatedremotelyfromtheoperatorC.thesystemiscontrolledautomaticallyD.alltheabove1908The_isacrystalwhich,underpressure,producesanelectriccurrentwhichvarieswiththepressure.压电式传感器是一种晶体，在压力下能产生电流，电流大小随压力变化而变化。A.alternatorB.glassthermometerC.burdontubeD.piezoelectricpressuretransducer1909handleandinstrumentsareonthefront.题干表达有误。可参考第1906题。A.openB.openfronttypeC.livefronttypeD.Noneoftheabove1905C1906C1907B1908D1909B,1910WithUMS,whentheengineroomisunwatched_willcontrolthemainengine.对于无人机舱，由值班驾驶员来控制主机。A.thebridgeofficeronwatchB.thechiefengineerC.thedutyengineerD.thedutymotorman1911Thedifferencebetweenmeasuredanddesiredvaluesiscalled_测量值和所需要值之间的差，称为“偏差”。A.make-upB.desiredvalueC.deviationD.setvaluesystemsareprovidedwithastand-bydevicewhichwillautomaticallybe_putinuseintheevenoftherunningdevicefailingthroughafaultcondition.备用设备装有自动启动系统，当运转设备故障时，便能自动投人使用。A.MannB.MonitoringC.Autostart-upD.NoneoftheaboveTheoperatingmediumforcontrolsystemsmaybe_控制系统的操作介质可以是压缩空气、液压油或电力。A.compressedairB.hydraulicoilC.electricityD.Alloftheabove1914_poweristhepowerdevelopedwithinthecylinderandcanbemeasmedbyanengineindicator.指示功是气缸内发出的功率；可通过示功图来测量。A.TheshaftB.ThemechanicalC.TheelectricD.Theindicated1915_controlsystemisoneinwhichthecontrolactionisindependentoftheout-put.控制作用与输出量无关，这种控制系统是开环控制。A.FeedbackB.NegativefeedbackC.CloseloopD.Openloop1910A1911C1912C1913D1914D1915D,Priortoanyoverhaulworkonelectricequipment,itisimportanttoensurethecircuitsare_对电气设备检修前，应确保电路切断。A.liveB.deadC.excitedD.online1917MoistureinaD.C.motorwouldcause_水分会引起直流电机短路。A.shortcircuitB.speedupC.slowdownD.hunting1918Oncommonlyusedships,iftwoA.C.generatorsareoperatedinparallel,theloadisdistributedevenlyby_两台交流发电机并联运行时，负荷可以通过调节原动机的转速的方法来实现。正确答案应为A.varyingtheD.C.excitervoltageB.varyingthereluctanceoftheairgapC.regulatingthespeedofprimemoverD.shortingoutpartofthearmaturewindings1919Electricinsulationismadeoforganicsubstancesandsogradually_withage.电器绝缘材料是由有机物质组成，随着时间的推移，性能会逐渐恶化。A.deterioratesB.increasesC.arefouledD.becomesbetter1920Electricinsulationismadeoforganicsubstancesandsogradually_withage.见上题。A.deterioratesB.increasesC.arefouledD.becomesbetter1916B1917A1918D1919A1920A,1921Thesystemwillincludevarious_suchaslowtanklevelalarmsandremoteoperationoftankoutletvalvesintheeventsofafire.油舱低位报警和速闭阀等都属于安全设备。A.SwitchesB.panelsC.alarmunitsD.safetydevices1922isusedtoproduceelectricpower._交流发电机用来产生交流电。A.AnalternatorB.freshwatergeneratorC.AcompressorD.Aclarifer1923Thecoilofwirerotatinginthemagneticfieldproducesthe_在磁场中旋转的线圈能产生电流。A.voltageB.currentC.powerD.frequency1924Shorepowermustbe_duringdockrepair.坞修期间，必须接岸电。A.disconnectedB.switchedoffC.cutoffD.connectedThecurrentflowingfirstinonedirectionandtheninanotheriscalled_current.方向改变的电流是交流电。A.analternatingB.arushC.adirectD.anexciting1921D1922A1923B1924D1925A,1926Electricalsupplyisalwaysneededevenifonlyforlightingsoafterashipgoesintoserviceitisextremelyrareforthemainbus-barstobedead,itthereforefollowsthatthebus-barsarecontinuouslyalive_thelifeoftheship.船舶的主母线在整个船舶使用期内都是持续有电的。A.alongB.willC.throughoutD.for1927Theswitchboardsfora.c.systemsdifferfromthed.c.switchgearinthattheopentypepanelsaregenerally_andthedead-frontswitchgearisthecomnnrule.用作交流系统的配电板与用作直流系统的配电板不同之处在于一般不允许使用开式面板，而常用表面不带电式。A.permissiblyB.permissibleC.nopermissibleD.notpermissible1928Youmusttakegoodcareofthedrainagecockoftheaircontrolsystem.Because_leadsscaleformedwhichmightmalfunctionsthepilotcontrolvalveandotherinstruments.必须仔细保养空气控制系统的放残考克。因为水分会引起水垢形成，从而使得控制阀和其他仪表产生故障。A.thetemperatureB.themstC.thepressureD.thehumidity1929Theliquidflowinginthecapillaryissuchthatthedifferencein_readingstakenbeforethecapillaryandafteritisrelatedtotheoilviscosity.对于在毛细管内流动的液体，毛细管前后的压差读数与油的粘度有关。A.pressureB.velocityC.flowrateD.temperature1930_shallbecontinuouslypoweredandshallhaveanautomaticchangeovertoastandbypowersupplyincaseoflossofnormalpowersupply.报警系统应持续供电。A.CoolingsystemB.AlarmsystemC.TheairconditioninginstallationD.Themootingequipment1926C1927D1928D1929A1930B,1931_isamachinebywhichelectricalenergyistransformedintomechanicalenergy.将电能转化为机械能的是电动机。A.AnalternatorB.AnelectricmotorC.AdieselengineD.Amainswitchboard1932Currentchangingindirectionandrisingandfallinginvalueis_见第1891题。A.A.C.B.D.C.C.generatorD.freshwatergenerator1933Switchkx)ardsmaybeofthedead-fronttypeinwhichalllivepartsareinstalledbehind_andonlytheoperationhandlesandinstrumentsareonthefront见第1906题。A.thecapstanB.thecollectorC.thepanelsD.thebrake1934Afterashipentersserviceitis_forthemainbus-bartobemadedead.船舶投人使用后，主母线不带电是极其少见的。A.usuallyB.commonlyC.exceptionalD.unavoidablyTheseparatesuppliesareconnectedineitherstarordeltaformation.Thestarformationismostcommonlyusedandrequires_slip-ringsonthealternator.Y形连接需要4个滑环。A.twoB.threeC.fourD.five1931B1932A1933C1934C1935C,1936Theoperationofparallelingtwoaltermatorsrequiresthevoltagestobeand_alsoinphase.见第1892题。A.zeroB.eliminatedC.differentD.equalWithapurely_loadthevoltageandcurrentareinphase,givingapowerfactorofone.见第1895题。A.inductiveB.resistanceC.combinedD.capacitate1938Theoperationof_twoaltermatorsrequiresthevoltagestobeequalandalsoinphase.见第1892题。A.parallelingB.series-mountingC.runningD.control1939Whichofthefollowingmarineexamplesbelongstotheopenloopcontrolsystem?只有舱室的加热系统可以采用开环控制。A.AccommodationheatingsystemB.SteeringgearC.BoilercontrolD.Cargocontrol1940istheactualvalueofthecontrolledcondition._测量值就是控制条件的实际值。A.DesiredvalueB.SetvalueC.MeasuredvalueD.Deviation1936D1937B1938A1939A1940C,1941Thedifferencebetweenmeasuredanddesiredvaluesiscalled_见第1911题。A.offsetB.errorC.deviationD.setvalue1942Theovercurentrelay_themotorcontactorwhenthemotorexceedsitsratedcurrent.见第1889题。A.connectsB.tripsC.foulsD.destructs1943Electricinsulationismadeoforganicsubstancesandsogradually_withage.见第1919题。A.deterioratesB.increasesC.arefouledD.arecontaminatedThe_isacrystalwhich,underpressure,producesanelectriccurrentwhichvarieswiththepressure.见第1908题。A.alternatorB.glassthermometerC.buniontubeD.piezoelectricpressuretransducer1945Domesticwaterpumpisstartedautomaticallyby_whichoperatesasthewaterlevelfallstoapredeterminedlevel.日用水泵是由压力开关自动启动的。A.alevelcontrollerB.atemperatureswitchC.afloatingballD.apressureswitch1941C1942B1943A1944D1945D,Afterthetroubleoftheautomaticcontrolsystemhasbeencompletelyeliminated,assistanceis_required.自动控制系统的故障已彻底排除，不再需要任何帮A.remainedB.stillC.nolongerD.muchmore1947WithUMS,whentheengineroomisunwatched_willcontrolthemainengine.见第1910题。A.thebridgeofficeronwatchB.thechiefengineerC.thedutyengineerD.thedutymotorman1948Thestaringcurrentofamotoris_theratedcurrent.见第1886题。A.thesameasB.muchlargerthanC.lessthanD.noneoftheabove1949Thealternatingcurrentgeneratorsupplyingaloadhasavoltagedropresultedfromtheload.Whentheloadhasalaggingpowerfactorthisvoltagedrop_由于负荷的特性，交流发电机会产生电压降，当负荷具有滞后的功率因数时该电压下降是很大的。A.issmallB.maybeneglectedC.isusefulD.isconsiderable1950Withapurelyresistanceloadthevoltageandcurrentareinphase,givingapowerfactorof_对于纯电阻的负荷，电压与电流同彻，功率因数为1A.oneB.lessthanoneC.morethanoneD.negativeone1946C1947A1948B1949D1950A,Thepowerfactorisameasureofthephasedifferencebetweenvoltageandcurrentandisexpressedasthe_ofthephaseangle.见第1890题A.sineB.cosineC.tangentD.cotangent1952Thefieldcoils_andthearmatureis_.Ibisisinfactthearrangementadoptedforlarge,heavydutyalternators.常用大型交流发电机的结构，线圈是旋转的而电枢是静止的。A.stationary/rotateB.stationary/stationaryC.rotate/stationaryD.rotate/rotateThestarformationismostcommonlyusedandrequires_onthealternator.见第1935题。A.oneslip-ringB.twoslipringsC.threeslipringsD.foursliprings1954Ana.c.switchboardisusually_thecorrespondingd.c.boardbecauseofthehighervoltageandlowercurrentsandsmallerbus-bars.交流配电板比相应的直流配电板尺寸小、重量轻。A.largerandheavierthanB.asmuchasC.smallerandlighterthanD.moredangerousthan1955Themagneticfieldisprovidedbyelectromagnetssorerangedthatadjacentpoleshave_磁场有电磁铁提供，其布置应使相邻的极具有相反的极性A.oppositepolarityB.thesamepolarityC.negativepolarityD.positivepolarity1951B1952C1953D1954C1955A,Toparallelanincomingmachinetoarunningmachinethereforeitisnecessarytoensurefirstlythat_见第1892题。A.twofrequenciesmustbebroughtintophaseB.theincomingmachineacceptsasmallamountofloadC.therunningmachinemustbeunloadD.bothvoltagesareequal1957isprovidedtoalternators,intheeventofprimemoverfailuretoensurethat_thealternatordoesnotactasamotor.交流发电机装备逆功率保护设备，是为了防止当发电原动机故障时，刁能当作马达使用。A.ReversecurrentprotectionB.ReversepowerprotectionC.SynchronisingdeviceD.Frequencymeter958Withapurely_loadthevoltageandcurrentareinphase,givingapowerfac-torofone.见第1950题。A.inductiveB.capacitiveC.combinedD.resistance1959Whentwodifferentmetalsarejoinedtoformaclosedcircuitandexposedtodifferenttemperaturesattheirjunctions_whichcanbeusedtomeasuretemtmture.当两种不同的金属连接形成封闭回路，连接处与不同的温度接触，将会产生电流据此可用来测量温度。此为热电偶的工作原理A.acurrentwillflowB.apowerwilldevelopC.aheatwillflowD.apressurewillproduce1960Movementofthediaphragmorbellowsis_byalinkagetoaneedleorpointerdisplaytoindicatethedifferentialpressurebetweentwosidesofthediaphragmorbellows.膜片或波纹管的移动通过连接装置传递到指针。以显示膜片或波纹管两侧的压差A.measuredB.recordedC.transferredD.controlled1956D1957B1958D1959A1960C,BourdonTubeisprobablythemostcommonlyused_measuringinstrument.波登管是最常用的表压力测量仪表。A.theabsolutepressureB.thegaugepressureC.thevacuumpressureD.thedifferentialpressure1962Thisarrangementis_iftheelementsaredirectlyconnectedtooneanotherandthecontrolactiontakesplacewithouthumaninvolvement.一步如果控制回路中，部件与部件之间直接相连，控制作用不需要人员的介入就能完成这种控制形式就是自动闭环控制。A.amanualclosedloopB.amanualopenedloopC.anautomaticclosedloopD.anautomaticopenedloop1963In_thecontrolactionisindependentontheoutput.控制作用与输出量无关，即为开环控制。A.aclosedloopcontrolsystemB.anopenloopcontrolsystemC.aboilercontrolsystemD.asteeringgearcontrolsystem1964Usuallythepanelsareinterlockedwith_sothatthedevicescanbemadedeadbeforethedoorsareopened.通常，面板与隔离开关是相互联锁的，这样在门打开之前，设备是不带电的。A.protectiveearthB.isolatorsC.groundswitchD.circuit-breakers1965It_foranemergencygeneratortorequireparalleling.对于应急发电机来说，一般不需要并联运行(除大型客轮外)。A.isusualB.isnotusualC.isnecessaryD.isnotimpossible1961B1962C1963B1964B1965B,Theswitchboardsfora.c.systemsdifferfromthed.c.switchgearinthattheopentypepanelsaregenerally_andthedead-frontswitchgearisthecommonrule.见第1927题A.permissiblyB.permissibleC.nopermissibleD.notpermissible1967_isusedtoproduceelectricpower.见第1922题。A.AnalternatorB.AfreshwatergeneratorC.AcompressorD.Aclarifer1968Themagneticfieldisprovidedbyelectromagnetssoarrangedthatadjacentpoleshave_见第1955题。A.oppositepolarityB.thesamepolarityC.negativepolarityD.positivepolarity1969Domesticwaterpumpisstartedautomaticallyby_whichoperatesasthewaterlevelfallstoapredeterminedlevel.见第1945题。A.alevelcontrollerB.atemperatureswitchC.apressureswitchD.afloatingball1970Brushlessgeneratorsaredesignedtooperatewithouttheuseof_无刷发电机，不需要碳刷、滑环和换向2S等装置。A.brushesB.slipringsC.commutatorsD.alloftheabove1966D1967A1968A1969C1970D,Agroundcanbedefinedasanelectricalconnectionbetweenthewiringofamotorandits_电机接地可以定义为，电机的电线与金属壳体之间的电气连接。A.shuntfieldB.circuitbreakerC.metalframeworkD.inter-pole1972Theoutputvoltageofa440volt,60hertz,ACgeneratoriscontrolledbythe_对于440V，60Hz的交流发电机的输出电压，是由励磁机的输出电压来控制的。A.primemoverspeedB.exciteroutputvoltageC.loadonthealternatorD.numberofpoles1973Anyelectricmotorcanbeconstructedtobe_任何交流电动机都应该防爆。A.shortproofB.groundproofC.explosionproofD.overloadproof1974Whichofthefollowingstatementsrepresentsthemaindifferencebetweenarelayandacontactor_接触器与继电器的主要区别是它能承受较大的负载。A.Contactorscontrolcurrentandrelayscontrolvoltage.B.Arelayisseriesconnectedandacontactorisparallelconnected.C.Contactorscanhandleheavierloadsthanrelays.D.Contactorsaremadefromsilverandrelaysaremadefromcopper.1975Anaccidentalpathoflowresistance,allowingpassageofabnormalamountofcurrentisknownasa/an_产生低电阻、高电流，即发生短路。A.opencircuitB.shortcircuitC.polarizedgroundD.groundreferencepoint1971C1972B1973C1974C1975B,Aresistanceinacircuitofunknownvalueistobetestedusingthevoltmeter/ammetermethod.Therefore,themetersshouldbeconnectedwith_电流表应与电阻串联，而电压表应与电阻并联。A.bothmetersinserieswiththeresistanceB.bothmetersinparallelwiththeresistanceC.theammeterinseriesandthevoltmeterinparallelwiththeresistanceD.theammeterinparallelandthevoltmeterinserieswiththeresistance1977Whichofthefollowingelectricmotorswouldbethesafestandmostreliabletouseonthemaindeckofavesselinfoulweatherconditions?在潮湿气候状况下，船舶主甲板上使用最安全、最可靠的电动机是水密性电动机。A.SealedmotorsB.DripproofmotorsC.EnclosedmotorsD.Watertightmotors1978Adirectcurrentpassingthroughawirecoiledaroundasoftironcoreisthedescriptionofasimple_直流电通过绕在软铁芯上的电线，这就是简单的电磁铁的结构。A.magneticshieldB.electromagnetC.piezoelectricdeviceD.electromagneticdomain1979Whichofthelisteddevicesisusedtomeasurepressureandconvertittoanelectricalsignal?压力传感器能测量压力，并把它转换成电信号。A.TransducerB.ReducerC.TransformerD.RectifierThedevicethatmostcommonlyutilizestheprincipleofelectromagneticinductionisthe_普遍利用电磁铁感应原理的设备是变压器。A.diodeB.transformerC.transistorD.rheostat1976C1977D1978B1979A1980B,Onefactorthatdeterminesthefrequencyofanalternatoristhe_决定交流发电机频率的一个因素是磁极的数目。A.numberofturnsofwireinthearmaturecoilB.numberofmagneticpolesC.strengthofthemagnetsusedD.outputvoltageWhichofthemotorsforthedeviceslistedbelowisfittedwithaninstantaneousoverloadrelay?一般地说，起货机装有瞬时过载继电器。A.FanB.PumpC.WinchD.Machinetool1983TheWheat-stonebridgeisaprecisionmeasuringinstrumentutilizingtheprincipleofchangesin_惠斯登电桥是一种利用电阻变化的原理的精确测量仪表。A.inductanceB.capacitanceC.resistanceD.amperage1984Thegreatestdetrimentaleffectonidleelectricalequipment,suchascargopumpmotors,isthe_对于闲置的电气设备，如货物泵电动机，最大的伤害是绝缘材料吸收水分。A.lossofresidualmagnetismB.absorptionofmoistureintheinsulationC.insulationvarnishflakingD.dirtcollectingonthewindings1985hefrequencyoutputofanoperatingalternatoriscontrolledbythe_对于运转中的发电机，输出频率是由转子电极之间的相对速度来控制。A.relativespeedoftherotorpolesB.numberoftumsofwireintheannaturecoilC.strengthofthemagnetsusedD.outputvoltage1981B1982C1983C1984B1985A,1986Anelectricaldevicewhichpreventsanactionfromoccurringuntilallotherrequiredconditionsaremetiscalleda/an_用来防止产生动作，直到其他所需要的条件都满足，这种电器设备被称为联锁设备。A.limitB.monitorC.modulatorD.interlockAcircuitbreakerandafusehaveabasicsimilarityinthattheyboth_电路切断器和熔断丝具有基本相同的作用过载时，都能切断电流。A.canberesettoenergizethecircuitB.shouldopenthecircuitwhenoverloadedC.willbumoutwhenanovercurrentflowdevelopsD.Alloftheabove1988Theelectrolyteinalead-acidstoragebatteryconsistsofdistilledwaterand_铅一酸蓄电池的电解质是由蒸馏水和硫酸组成。A.hydrogenchlorideB.calciumchlorideC.sulfuricacidD.muriaticacid1989Electricallea