船舶动力装置试题-第87页-百科知识题库-简明问答题库

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[单选]Thesepistonringsaresobadlywornthattheymustbe（）．

[单选]Thereshouldbealubricatingoil（）betweenthemainbeatingsandthecrankshaft．

[单选]Thereisaninjectionpumpforeachcylinder，whichisusuallyoperatedonceeverycycleby（）onthecamshaft．

[单选]Thereis（）inanywatercoolingsystemforadieselengineallowingforexpansionandwatermake-upinthesystemaswellasairventandchemicalsaddition．

[单选]Theworkingcycleofafour-strokedieselengineconsistsoffourevents：（）（1）compression（2）expansion（3）exhaust（4）suctionThecorrectsequenceis

[单选]Theworkfueldoesineachworkingcyclecanbeobtainedbytakingthe（）．

[单选]Thewordssuchasquantity，grade，viscosityandspecificgravityshouldbeinthe（）．

[单选]Thewithdrawingofthecylinderliners，ingeneral，dependsontheir（）．Thismayamounttoapproximately1/120ofthediameterinsomeengines．

[单选]Thewaytoreduce（）istobuildupafilmoflubricantbetweenanytwosurfacesthatrubagainsteachother．

[单选]Theviscosityregulatorcontrolsthefueloiltemperature（）provideoilatthecorrectviscosityforcombustion．

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