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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(jī)安裝中，曲軸靠推力軸承保持軸向?qū)χ小?"Adieselenginewhichisratedfornormaloperationatacrankshaftspeedof800rpm,iscommonlyc
2、lassedasa________."slow-speeddieselmedium-speeddieselhigh-speeddieselconstant-speeddieselB曲軸轉(zhuǎn)速800轉(zhuǎn)／分以額定功率正常運(yùn)行的柴油機(jī)稱為中速柴油機(jī)。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?qū)Υ斑M(jìn)行適當(dāng)?shù)目刂啤?"Whentwomediumspeeddieselenginescoupledinparalleltoacommonpropellershaftthatoperatesatthesamespeedastheengines,
5、whichoftheoperatingconditionslistedwillapply?"Fullhorsepowerisavailableaheadandastern.Oneenginemustberunningaheadandtheotherastern.Fullreversingtorqueisnotavailable.Mechanicalreductiongearingisrequired.D當(dāng)兩臺中速柴油機(jī)并排連接到同速運(yùn)轉(zhuǎn)的普通螺旋槳軸上，需要機(jī)械減速裝。5Whichofthelisteddesignfeaturesismostcommontoatwo-str
6、oke/cyclelow-speedmainpropulsiondieselengine?Crossheadconstruction.Cross-scavengingairflow.Trunktypepistons.Singlereductiongearing.A低速二沖程主推進(jìn)柴油機(jī)普遍采用十字頭結(jié)構(gòu)。6Adisadvantageofatwo-stroke/cycledieselengineis________.morepowerstrokesperrevolutiontheuseofscavengeairmorecomplicatedvalvegearhigherwor
7、kingtemperaturesofthepistonandcylinderD二沖程柴油機(jī)的缺點(diǎn)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(jī)相比，四沖程柴油機(jī)的廢氣溫度高。8Thedo
