欢迎来到天天文库
浏览记录
ID:38528793
大小:101.50 KB
页数:5页
时间:2019-06-14
《轮机大管轮英语真题45期》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、中华人民共和国海事局2008年第1期海船船员适任证书全国统考试题(总第45期)科目:轮机英语试卷代号:803适用对象:无限、近洋航区3000KW及以上船舶大管轮(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82题,每题1分,第83题至94题,每题1.5分。一、单项选择题:1._____theengines,thedieselengineis____usedengineonboard.A.Between
2、/morecommonlyB.Among/themostcommonlyC.Between/notmorecommonlyD.Among/notthemostcommonly2.Pistoncoolingfinsarelocated.A.atopthepistoncrownB.beneaththepistoncrownC.atthebaseofthepistonskirtD.insidethecylinderlinercoolingwaterjacket3.Whichofthefollowingcondition
3、sisrealizedbytheturbo-chargingofapreviouslynaturallyaspirateddieselengine?A.Ignitionlagincreases.B.Lubeoilsystempressureincreases.C.Brakespecificfuelconsumptionincreases.D.Mechanicalefficiencyincreases.4.Whichofthefollowingrepresentsthesignificancethefueloilc
4、etanenumber?A.Thecetanenumberhasnoaffectoninjectionlag.B.Thecetanenumberisanindicationofthefuel'sviscosity.C.Ignitionlagisreducedwithfuelshavingahighcetanenumber.D.Thecetanenumberisoflittlesignificanceinthecombustionprocess.5.Indirectcoolingoffuelinjectornozz
5、leholdersfordieselenginesisaccomplishedprimarilybyA.heatconductionintotheinjectedfueloilB.heatconductionintothewaterjacketwallC.watercirculationthroughpassagesintheholderD.fueloilcirculationthroughpassagesmtheholder6.Theupperpistonringsmlarge,slow-speed,two-s
6、troke/cycledieselenginesaremosteffectivelylubricatedbyoil____.A.fedfrommechanicallubricatorsB.thrownofffromthemainbearingsC.suppliedfromwickfeddriplubricatorsD.flowfromacentrifugalorbanjooiler7.Inadieselengineclosedfreshwatercoolingsystem,theamountofcoolantfl
7、owingthroughtheheatexchangeriscontrolledbythe__.A.suctionpressureregulatorB.thermostaticbypassvalveC.seawatertemperatureD.waterlevelintheexpansiontank8.Exhaustgasesaregenerallyremovedfromthecylindersofatwo-stroke/cycledieselengineby.A.naturalaspirationB.maske
8、dintakevalvesC.airceilsD.scavengingair9.Vesselshavingmainenginesarrangedforairstartingaretobeprovidedwithatleast__.A.oneautomaticdrainservingbothcontainersB.twoairstartingcontainersofappr
此文档下载收益归作者所有