中华人民共和国海事局2003年第1期海船船员适任证书全国统考试题(总第30期)科目：轮机英语试卷代号：806适用对象：近洋航区750-3000KW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．Achargeoffreshairisdrawnintotheenginecylinderandthen_____bythemovingpiston_____veryhighpressure.A.pressed/toB.pressurized/withC.pushed/inDpressed/to2.Whatfunctionisprovidedbythecrankcaseventilationsystemonsomedieselengines?A.Increasesthesludgeformingtendencyoflubeoil.B.Preventstheaccumulationofcombustiblegases.C.Improveslubeoilcooling.D.Improvescoldweatherstarting.3.Ifyourvesselburns8tonsoffuelperdayat15knots,howmanytonsperdaywillitburnat18knots?A.13.82tonsB.15.61tonsC.16.00tonsD.16.37tons4.Thejointfacebetweenthecylindercoverandthelinerisarranged_____thecombustionprocessaspossible.A.suchfarawayfromB.suchnearbyC.asfarawayfromD.asnearby5.Somevesselsareequippedwithawaterlubricatedsterntube.Whenatsea,operatingundernormalconditions,thewaterservicevalvefromtheship'ssaltwatersystemtothebearingshouldbe_____.A.closed,andnoleakagepermittedacrosstheshaftpackingB.closed,andonlyslightleakagepermittedacrosstheshaftpackingC.opened,andnoleakagepermittedacrosstheshaftpackingD.opened,andonlyslightleakagepermittedacrosstheshaftpacking6.A:Pleasetellmethespecificationsandquantity.B:_____.A.PumpdieseloilfirstB.300tonsof180cstfueloilC.ThefigureisallrightD.OK,I'llsignit7.Insomedesignsthecylinderoilistimedsothattheoilinjectsonlyonthe_____.A.pistoncrownB.pistongrooveC.pistonskirtD.pistonringbelt8.Anycarbonbuiltuponsurfacesmustbewashedawayby_____additivesandheldinsuspensionbya_____additive.A.dispersant/detergentB.detergent/dispersantC.dispersant/dispersantD.detergent/detergent9.Propellerpitchspeedminusshipspeeddividedbythepropellerpitchspeedistermed_____.A.apparentslipB.trueslipC.pitchD.propulsiveefficiency10.Aftertheorder'_____'isgiven,theairsystemisshutdown,theturninggearputin.A.FinishedWithEngineB.StopTheEngineC.Stand-byEngineD.Slow-downEngine11.Bywhichofthefollowingmeansisforceefficientlyprovidedtovarythepitchofthebladesonamoderncontrollablepitchpropeller?A.HydraulicB.MechanicalC.PneumaticD.Electrical12.Thediffuserpreventspressurepulsesfromonecylinder_____anotherduringoperation.A.tointerferewithB.interferingwithC.tohelpscavengingD.helpingscavenging13.Thedifferencebetweenasuperchargedengineandanun-superchargedengineisthat_____operatesatanincreasedpressure.A.thelaterB.thelatterC.theformerD.thefarmer14.Large,two-stroke/cycle,mainpropulsion,dieselenginecylinderscanbesuccessfullypressurechargedduringnormaloperation,byusingthe_____.A.exhaustgastemperaturesystemB.exhaustloadsystemC.constantorpulsepressuresystemD.constantvolumesystem15.Ingeneral,_____issuitablefordeliveringsamllquantitiesathighpressure.A.reciprocatingpumpB.gearpumpC.centrifugalpumpD.vanepump16.Thepumpsemployedonboardshipcanbedividedintotwomaincategories,i.e._____pumpsandcentrifugalpumps.A.gearB.non-positivedisplacementC.positivedisplacementD.rotary17.Ifthecapacityofacentrifugalpumpdecreasesgraduallyoveralongperiodoftime,youshouldreplacethe_____.A.packingglandB.mechanicalsealsC.lanternringsD.wearingrings18._____isusedforwashinganddrinking.A.Theballastsystem...