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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對中。2"Adieselenginewhichisratedfornormaloperationatacrankshaftspeedof800rpm,iscommonlyc
2、lassedasa________."slow-speeddieselmedium-speeddieselhigh-speeddieselconstant-speeddieselB曲軸轉速800轉／分以額定功率正常運行的柴油機稱為中速柴油機。3Whichofthefollowingstatementsiscorrectconcerningavailableasternpowerfordieselmainpropulsionsystems?Asternpoweristobeprovidedinasufficientamounttosecurepropercontrolofth
3、eshipinallnormalcircumstances.Theasternpowerofthemainpropellingmachineryistoprovideforcontinuousoperationasternat60%oftheaheadrpmatratedspeed."Formainpropulsionsystemswithoutreversinggears,controllablepitchpropellersorelectricpropulsiondrive,runningasternisnottoleadtooverloadconditions.""A
4、sternpoweravailablewillbeequaltoaheadpowerwhencontrollablepitchpropellersareutilized,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對船舶進行適當?shù)目刂啤?"Whentwomediumspeeddieselenginescoupledinparalleltoacommonpropellershaftthatoperatesatthesamespeedastheengines,
5、whichoftheoperatingconditionslistedwillapply?"Fullhorsepowerisavailableaheadandastern.Oneenginemustberunningaheadandtheotherastern.Fullreversingtorqueisnotavailable.Mechanicalreductiongearingisrequired.D當兩臺中速柴油機并排連接到同速運轉的普通螺旋槳軸上，需要機械減速裝。5Whichofthelisteddesignfeaturesismostcommontoatwo-str
6、oke/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構。6Adisadvantageofatwo-stroke/cycledieselengineis________.morepowerstrokesperrevolutiontheuseofscavengeairmorecomplicatedvalvegearhigherwor
7、kingtemperaturesofthepistonandcylinderD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。8Thedo
