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单选题
Scuffed cylinder liner wearing surfaces in a diesel engines can result from （）
A
chromium plating piston rings
B
knurling the piston skirt
C
extended maximum power operation
D
applying load to a cold diesel engine
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单选题Scuffed cylinder liner wearing surfaces in a diesel engines can result from （）A
starting the engine while hotB
knurling the piston skirtC
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low compression pressureB
increased piston wearC
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单选题The diameter of a piston is usually less at the crown than at the skirt, in order to （）.A
facilitate the installation of piston ringsB
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单选题Each cylinder liner on the marine medium speed engines （）.A
is usually cooled by sea waterB
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单选题In a diesel engine, an integral liner is one in which the cooling water （） Ⅰ.flows through the cylinder liner jackets Ⅱ.touches the outer side of the linerA
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单选题In a diesel engine, a cylinder liner should be replaced if it is （） Ⅰ.Scuffed Ⅱ.ScoredA
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单选题In order to increase the wearing resistance, the cylinder liner surfaces are sometimes （）.A
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单选题If over a period of time, the oi1 film partially disappears, so that dry areas are formed on the cylinder wall, these areas and the piston surfaces will by frictional interaction, become finely scuffed and hardened, iegood mirror surface" will have deterioratedWhat condition of the piston rings can result in this phenomenon?（）A
micro-seizureB
stickingC
scratchedD
breakage/collapse
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单选题Scuffed cylinder liner surfaces in a diesel engine can result form（）A
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scrape oil from the sides of the pistonC
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单选题In a diesel engine, excessive cylinder liner wear will cause （） Ⅰ.increased blow-by Ⅱ.wear between the piston ring and grooveA
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