轮机三管轮考证英语43期试题加答案.doc

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1、中华人民共和国海事局2007年第2期海船船员适任证书全国统考试题(总第43期)科目：轮机英语试卷代号：805适用对象：无限、近洋航区3000KW及以上船舶二/三管轮（本试卷卷面总分100分，及格分为70分，考试时间为100分钟）答题说明：请选择一个最合适的答案，并将该答案按答题卡要求，在其相应位置上用2B铅笔涂黑。第1题至74题，每题1分，第75题至78题，每题1.5分,第79题至80题,每题10分。一、单项选择题1.______theengines,thedieselengineis______usedengineonboard.A.Between/morecommonlyB

2、.Among/themostcommonlyC.Between/notmorecommonlyD.Among/notthemostcommonly2.Theaveragepressureexertedonapistonduringeachpowerstrokeistermed______.A.indicatedhorsepowerB.meaneffectivepressureC.exhaustbackpressureD.compressionpressure3.Thecetanenumberratesfuelsfordieselenginesaccordingtoits____

3、__.A.antiknockcharacteristicsB.ignitionqualitiesC.ratesofvaporizationD.viscosity4.Thetimebetweeninjectionandignitionofthefuelisknownas______.A.turbulencelagB.afterburningratioC.pre-ignitionlagD.ignitiondelay5.______controlsthefueloiltemperatureinordertoprovideoilatthecorrectviscosityforcombu

4、stion.A.TheviscosityregulatorB.ThetemperaturecontrollerC.TheflowmeterD.Thepressureswitch6.Constantcoolingthevariouscomponentsofdieselenginehasanumberoffunctionsexceptfor______.A.goodlubricationB.lowthermalstressC.goodmechanicalpropertiesD.acidcorrosion7.Adevicewhichfunctionstobringadieseleng

5、inetoafullstoptoprotectitfromdamageisknownasa/an______.A.torquelimiterB.over-speedtripC.over-speedgovernorD.loadlimitgovernor8.Enginespeedsatwhichresonancecanoccuraretermed______.A.maximumspeedsB.fullspeedsC.seaspeedsD.criticalspeeds9.Prolongedoperationofadieselenginewithaclosedcoolingwaters

6、ystematlowerthannormaldesignedoperatingtemperaturescan______.A.increasepoweroutputB.decreaselubeoilviscosityC.eliminatefuelknockD.causesulfuricacidformation10.______onashiptransmitspowerfromtheenginetothepropeller.A.TheautomaticcontrolsystemB.ThespeedregularlysystemC.ThetransmissionsystemD.T

7、hecompressionairsystem11.Ina_____boilerthehotgasesfromthefurnacepassthroughthetubeswhilethewaterisontheoutside.A.water-tubeB.fire-tubeC.exhaustgasD.composite12.Thefuelsupplysystemtoanautomaticauxiliaryboiler,willbeautomaticallyshutdowniftheboiler__