轮机长用轮机英语4647题库

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1、编号问题选择A选择B选择C选择D答案注解1"Onalargedieselengineinstallation,crankshaftaxialalignmentismaintainedbythe________."pistonrodguidesenginethrustbearingcrossheadbearingmainshaftflexiblecouplingB在大型柴油机安装中，曲轴靠推力轴承保持轴向对中。2"Adieselenginewhichisratedfornormaloperationatacranksha

2、ftspeedof800rpm,iscommonlyclassedasa________."slow-speeddieselmedium-speeddieselhigh-speeddieselconstant-speeddieselB曲轴转速800转／分以额定功率正常运行的柴油机称为中速柴油机。矚慫润厲钐瘗睞枥庑赖。3Whichofthefollowingstatementsiscorrectconcerningavailableasternpowerfordieselmainpropulsionsystems?Ast

3、ernpoweristobeprovidedinasufficientamounttosecurepropercontroloftheshipinallnormalcircumstances.Theasternpowerofthemainpropellingmachineryistoprovideforcontinuousoperationasternat60%oftheaheadrpmatratedspeed."Formainpropulsionsystemswithoutreversinggears,control

4、lablepitchpropellersorelectricpropulsiondrive,runningasternisnottoleadtooverloadconditions.""Asternpoweravailablewillbeequaltoaheadpowerwhencontrollablepitchpropellersareutilized,thusdiscountingtheneedforincreasedoperatingparameters."A倒车功率必须能提供足够的功率确保在各种正常情况下能够对

5、船舶进行适当的控制。聞創沟燴鐺險爱氇谴净。4"Whentwomediumspeeddieselenginescoupledinparalleltoacommonpropellershaftthatoperatesatthesamespeedastheengines,whichoftheoperatingconditionslistedwillapply?"Fullhorsepowerisavailableaheadandastern.Oneenginemustberunningaheadandtheotheraster

6、n.Fullreversingtorqueisnotavailable.Mechanicalreductiongearingisrequired.D当两台中速柴油机并排连接到同速运转的普通螺旋桨轴上，需要机械减速装。残骛楼諍锩瀨濟溆塹籟。5Whichofthelisteddesignfeaturesismostcommontoatwo-stroke/cyclelow-speedmainpropulsiondieselengine?Crossheadconstruction.Cross-scavengingairflow

7、.Trunktypepistons.Singlereductiongearing.A低速二冲程主推进柴油机普遍采用十字头结构。酽锕极額閉镇桧猪訣锥。6Adisadvantageofatwo-stroke/cycledieselengineis________.morepowerstrokesperrevolutiontheuseofscavengeairmorecomplicatedvalvegearhigherworkingtemperaturesofthepistonandcylinderD二冲程柴油机的缺点是气缸

8、头的温度高。彈贸摄尔霁毙攬砖卤庑。7"Incomparingenginesofequalhorsepower,higherexhaustgastemperaturesoccurina/an________."opposed-pistonenginedouble-actingenginetwo-stroke/cycleenginef