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1、WORD格式可編輯編號(hào)問(wèn)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?"Adieselenginewhichisratedfornormaloperati
2、onatacrankshaftspeedof800rpm,iscommonlyclassedasa________."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)。3Whichofthefollowingstatementsiscorrectconcerningavailableasternpowerfordieselmainpropulsionsyste
3、ms?Asternpoweristobeprovidedinasufficientamounttosecurepropercontroloftheshipinallnormalcircumstances.Theasternpowerofthemainpropellingmachineryistoprovideforcontinuousoperationasternat60%oftheaheadrpmatratedspeed."Formainpropulsionsystemswithoutreversinggea
4、rs,controllablepitchpropellersorelectricpropulsiondrive,runningasternisnottoleadtooverloadconditions.""Asternpoweravailablewillbeequaltoaheadpowerwhencontrollablepitchpropellersareutilized,thusdiscountingtheneedforincreasedoperatingparameters."A倒車功率必須能提供足夠的功
5、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,whichoftheoperatingconditionslistedwillapply?"Fullhorsepowerisavailableaheadandastern.Oneenginemustberunningaheadandtheoth
6、erastern.Fullreversingtorqueisnotavailable.Mechanicalreductiongearingisrequired.D當(dāng)兩臺(tái)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-stroke/cyclelow-speedmainpropulsiondieselengine?Crossheadconstruction.Cross-scavengingairflow
7、.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________.morepowerstrokesperrevolutiontheuseofscavengeairmorecomplicatedvalvegearhigherworkingtemperaturesofthepistonandcylinderD二沖程柴油機(jī)的缺點(diǎn)是氣缸頭的溫度高。7
8、"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
