轮机英语历年真题42期.doc

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1、中华人民共和国海事局2007年第1期海船船员适任证书全国统考试题(总第42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.The______engineisusedforalternatorsandsometimesf

2、ormainpropulsionwithagearboxtoprovideapropellerofbetween90to120rpm.A.four-strokeB.two-strokeC.slowspeedD.reversible2.Thedischargeflowofareciprocatingpumpis______.A.steadyB.inpulsationC.continuousD.large3.Thecetanenumberofadieselfueloilindicatesits______.A.vis

3、cosityB.acidcontentC.heatingvalueD.ignitionquality4.Alwaysensurethattheturninggearis______,evenatthequay,thewavefromothershipsmayturnthepropellerandthustheengine.A.disengagedB.engagedC.assembledD.disassembled5.Camshaftsareusuallydrivenbytiminggearsor______.A.

4、pushrodsB.chaindrivesC.rockerarmsD.flywheels6.Thecylinderoilispumpedintothecylinder(vianon-returnvalves)whenthepistonringspassthelubricatingorifices,during______.A.theupwardstrokeB.thedownwardstrokeC.thepowerstrokeD.thesuctionstroke7.Thetotalstartingaircapaci

5、tyrequiredforreversiblemainenginesistobesufficientforaleast______.A.sixconsecutive(连续的)startsB.eightconsecutivestartsC.tenconsecutivestartsD.twelveconsecutivestarts8.Adirtydieselengineoilfilterelementcanbestbedetectedby______.A.visualinspectionoftheelementsB.

6、thepressuredropacrossthefilterC.highlubeoilsumptemperatureD.decreaseinoilviscosityfromthefilter9.Beforeamarinedieselengineisstartedthecylindersandpistonsmustbe______.A.cooledtoappropriatetemperatureB.warmedupgraduallytoappropriatetemperatureC.openedupandrenew

7、edD.groundandpolished10.Acontrollablepitchpropelleronadieseldrivenvesseleliminatestheneedfor______.A.frictionclutchesB.disconnectclutchesC.reversinggearsD.reductiongears11.Themaximumpressuredevelopedbyawasteheatboilerisdeterminedbythemainengineexhaust______.A

8、.gascompositionB.gastemperatureC.pressureD.timing12.______continuouslyextractthecrankcaseatmosphere,viaapipesystem,andmoveitpastasensitiveandaccurateopacity(不透明)measuringtrack.A.Theoilmis