轮机英语历年真题41期.doc

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1、中华人民共和国海事局2006年第3期海船船员适任证书全国统考试题(总第41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.Adieselengineissimilartoagasolineengineexc

2、eptthattheformerhasno______.A.cross-headB.sparkplugC.connectingrodD.cylinder2.Adieselenginewhichisratedfornormaloperationatacrankshaftspeedof800RPM,iscommonlyclassedasa______.A.slow-speeddieselB.medium-speeddieselC.high-speeddieselD.constant-speeddiesel

3、3.Whichofthedieselenginecomponentslistedincreasesairdensityandhelpstoimproveengineoperatingefficiency?A.ImpellerB.CompressorC.After-coolerD.Exhaustdiffuser4.Foragivensizeengine,thetwo-stroke/cycledieselenginewilldelivermorepowerthanafour-stroke/cycledie

4、selenginebecause______.A.ithasalongerpowerstrokeB.moreairgetsintothecylindereachstrokeC.itdevelopstwiceasmanypowerstrokesatthesamespeedD.highercombustionpressureisdeveloped5.Theintakevalvesinadieselenginearereseatedby______.A.camfollowersB.pushrodsC.com

5、bustiongasesD.valvesprings6.Accordingtothewaytheenergyoftheexhaustgasesisutilized,pressure-chargingcanbedividedintotwomainsystems,namely,theconstant-pressuresystemand______.A.thepulse-phasesystemB.thepulseDopplersystemC.thepulsesystemD.thepulseintervals

6、ystem7.Anover-speedsafetydeviceisusuallyfittedtoageneratorenginefor______intheeventofover-speed.A.cuttingpowerofftheengineB.increasingthefuelpumpsettingC.brakingthecrankshaftD.stabilizingtheshipspeed8.Whatpreventativemaintenanceshouldbedonefrequentlytod

7、ieselenginestartingairreceivers?A.Draintheaccumulatedmoisture.B.Testthereliefvalves.C.Watchthetemperaturetopreventfluctuationsinpressure.D.Cleantheinteriortoremoveoilandforeignmatter.9.Immediatelyafteranydieselengineisstarted,theengineershouldcheckthe__

8、____.A.crankcasepressureB.lubeoilpressureC.seawaterpressureD.exhausttemperature10.Acontrollablepitchpropelleronadieseldrivenvesseleliminatestheneedfor______.A.frictionclutchesB.disconnectclutchesC.reversinggearsD.reductiongears11