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ID:31430051
大小:2.47 MB
页数:452页
时间:2019-01-09
《轮机长用轮机英语4647题库.》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、资料编号问题选择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"Adieselenginewhichisratedfornormaloperationatacran
2、kshaftspeedof800rpm,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?Asternpo
3、weristobeprovidedinasufficientamounttosecurepropercontroloftheshipinallnormalcircumstances.Theasternpowerofthemainpropellingmachineryistoprovideforcontinuousoperationasternat60%oftheaheadrpmatratedspeed."Formainpropulsionsystemswithoutreversinggears,controllab
4、lepitchpropellersorelectricpropulsiondrive,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
5、舶进行适当的控制。4"Whentwomediumspeeddieselenginescoupledinparalleltoacommonpropellershaftthatoperatesatthesamespeedastheengines,whichoftheoperatingconditionslistedwillapply?"Fullhorsepowerisavailableaheadandastern.Oneenginemustberunningaheadandtheotherastern.Fullreve
6、rsingtorqueisnotavailable.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。5Whichofthelisteddesignfeaturesismostcommontoatwo-stroke/cyclelow-speedmainpropulsiondieselengine?Crossheadconstruction.Cross-scavengingairflow.Trunktypepistons.S
7、inglereductiongearing.A低速二冲程主推进柴油机普遍采用十字头结构。6Adisadvantageofatwo-stroke/cycledieselengineis________.morepowerstrokesperrevolutiontheuseofscavengeairmorecomplicatedvalvegearhigherworkingtemperaturesofthepistonandcylinderD二冲程柴油机的缺点是气缸头的温度高。7"Incomparingenginesof
8、equalhorsepower,higherexhaustgastemperaturesoccurina/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。8Thed
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