轮机长用最新轮机英语4647试题库汇总

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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"Adieselenginewhichisratedfornormaloperationatacrankshaftsp

2、eedof800rpm,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。3Whichofthefollowingstatementsiscorrectconcerningavailableasternpowerfordieselmainpropulsionsystems?Asternpoweristobeprovi

3、dedinasufficientamounttosecurepropercontroloftheshipinallnormalcircumstances.Theasternpowerofthemainpropellingmachineryistoprovideforcontinuousoperationasternat60%oftheaheadrpmatratedspeed."Formainpropulsionsystemswithoutreversinggears,controllablepitchpropellersore

4、lectricpropulsiondrive,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船舶进行适当的控制。4"Whentwomediumsp

5、eeddieselenginescoupledinparalleltoacommonpropellershaftthatoperatesatthesamespeedastheengines,whichoftheoperatingconditionslistedwillapply?"Fullhorsepowerisavailableaheadandastern.Oneenginemustberunningaheadandtheotherastern.Fullreversingtorqueisnotavailable.Mechan

6、icalreductiongearingisrequired.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。5Whichofthelisteddesignfeaturesismostcommontoatwo-stroke/cyclelow-speedmainpropulsiondieselengine?Crossheadconstruction.Cross-scavengingairflow.Trunktypepistons.Singlereductiongearing.A低速二冲程主推进柴油机普遍采用

7、十字头结构。6Adisadvantageofatwo-stroke/cycledieselengineis________.morepowerstrokesperrevolutiontheuseofscavengeairmorecomplicatedvalvegearhigherworkingtemperaturesofthepistonandcylinderD二冲程柴油机的缺点是气缸头的温度高。7"Incomparingenginesofequalhorsepower,higherexhaustgastemperatures

8、occurina/an________."opposed-pistonenginedouble-actingenginetwo-stroke/cycleenginefour-stroke/cycleengineD与相同马力的柴油机相比，四冲程柴油机的废气温度高。8Thedou