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1、編號問題選擇A選擇B選擇C選擇D答案注解1"Onalargedieselengineinstallation,crankshaftaxialalignmentismaintainedbythe________."pistonrodguidesenginethrustbearingcrossheadbearingmainshaftflexiblecouplingB在大型柴油機安裝中，曲軸靠推力軸承保持軸向?qū)χ小?"Adieselenginewhichisratedfornormaloperationatacrankshaftspeedof800rpm,iscommonly
2、classedasa________."slow-speeddieselmedium-speeddieselhigh-speeddieselconstant-speeddieselB曲軸轉(zhuǎn)速800轉(zhuǎn)／分以額定功率正常運行的柴油機稱為中速柴油機。3Whichofthefollowingstatementsiscorrectconcerningavailableasternpowerfordieselmainpropulsionsystems?Asternpoweristobeprovidedinasufficientamounttosecurepropercontrolo
3、ftheshipinallnormalcircumstances.Theasternpowerofthemainpropellingmachineryistoprovideforcontinuousoperationasternat60%oftheaheadrpmatratedspeed."Formainpropulsionsystemswithoutreversinggears,controllablepitchpropellersorelectricpropulsiondrive,runningasternisnottoleadtooverloadcondition
4、s.""Asternpoweravailablewillbeequaltoaheadpowerwhencontrollablepitchpropellersareutilized,thusdiscountingtheneedforincreasedoperatingparameters."A倒車功率必須能提供足夠的功率確保在各種正常情況下能夠?qū)Υ斑M行適當(dāng)?shù)目刂啤?"Whentwomediumspeeddieselenginescoupledinparalleltoacommonpropellershaftthatoperatesatthesamespeedasthee
5、ngines,whichoftheoperatingconditionslistedwillapply?"Fullhorsepowerisavailableaheadandastern.Oneenginemustberunningaheadandtheotherastern.Fullreversingtorqueisnotavailable.Mechanicalreductiongearingisrequired.D當(dāng)兩臺中速柴油機并排連接到同速運轉(zhuǎn)的普通螺旋槳軸上，需要機械減速裝。5Whichofthelisteddesignfeaturesismostcommont
6、oatwo-stroke/cyclelow-speedmainpropulsiondieselengine?Crossheadconstruction.Cross-scavengingairflow.Trunktypepistons.Singlereductiongearing.A低速二沖程主推進柴油機普遍采用十字頭結(jié)構(gòu)。6Adisadvantageofatwo-stroke/cycledieselengineis________.morepowerstrokesperrevolutiontheuseofscavengeairmorecomplicatedvalvege
7、arhigherworkingtemperaturesofthepistonandcylinderD二沖程柴油機的缺點是氣缸頭的溫度高。7"Incomparingenginesofequalhorsepower,higherexhaustgastemperaturesoccurina/an________."opposed-pistonenginedouble-actingenginetwo-stroke/cycleenginefour-stroke/cycleengineD與相同馬力的柴油機相比，四沖程柴油機的廢氣溫度高。8Thedou
