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單項(xiàng)選擇題

If a diesel engine turned over at normal cranking speed but failed to start, the cause could be late fuel injection or （）

A.excessive fuel pressure
B.high lube oil viscosity
C.inadequate fuel injection
D.excessive starting air pressure

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單項(xiàng)選擇題

A bronze bearing liner with a lead-tin flashing has a milky-white color over most of its surface and some areas of exposed bronze, the white coloring indicates（）

A.proper break-in wear
B.improper break-in wear
C.relocation of the overlay flashing
D.water contamination of the lube oil system

單項(xiàng)選擇題

If a diesel engine turned over freely but failed to start, the cause could be （）

A.water in the fuel
B.cold lube oil
C.excessive starting air pressure
D.excessive fuel pressure