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1、輪機英語聽力與會話三版口述和問答題答案第一章口述Theengineroomistheheartofaship.Itisgenerallylocatedatthesternneartheshipbottom.Intheengineroom,therearealotofmachineryandsystems,suchasthemainengine,thegeneraterengine,boilers,pumps,therefrigeratingsystem,andtheairconditioningsystem.Themainengine,alsocalledthemainp
2、ropulsionplant，isthelargestandmostimportantone.Themodernimprovementofcontrolsystemsresultsinmachineryspaceremainingunattendedforlongperiods.ThatisUMS.第二章口述Themaindifferencebetweenthedieselengineandthegasolineengineinclude:1)thecombustionmediumofadieselengineisdieseloilorfueloil,whilethatf
3、oragasolineengineisgasoil.2)thedieselengineisignitedthroughcompressionofhot,highpressureoil/airmixture,butthegasolineengineisignitedbyelectricalsparkplug.3)fordieselengine,theairandoilismixedinsidethecylinder,whileforgasolineengine,theyaremixedoutsidethecylinder.First,Iwilltellthecadetthe
4、importancetheengineroom.Second,Ishouldintroducethevariousmachineryandsystemsintheengineroom,suchasthemainengine,thegeneraterengine,boilers,pumps,therefrigeratingsystem,andtheairconditioningsystem.Third,Iwillshowhimhowtooperatethevariousequipmentanddevicessafely,andintroduceasmuchsafetykno
5、wledgeasIcan.sameasquestionNo2.Thepowerofthedieselengineistransmittedtothepropellerthroughthetransmissionsystem.Theitemsoftransmissionsystemincludevariousshafts,suchasthethrustshaft,oneormoreintermediateshaftsandtailshaft.Theseshaftsaresupportedbythethrustblock,intermediatebearingsandthes
6、terntubebearing.Thepropellerconsistofabosswithseveralblades,.Thethrustistransmittedalongtheshaftingtothethrustblockandfinallytoshipstructure.Whentheshipissailingatfullspeed,itneedfourenginesrunning.Whentheshipissailingathalfspeed,itrequiretwoenginesrunning.Whiletheshipisoperatingatabout30
7、%offullspeed,oneengineisenoughtomeetitspowerrequiement.Thatis,theshipcanbeoperatedwithsingleengine,doubleengines,orfourenginesaccordingtheloadcondition.Generally,whentheshipissailingatseaspeed,ithasfourenginserunning,whieitapproachesthewharf,ithastwo.Thestructureoft
