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單項選擇題

A diesel engines crankcase oil level is found to be too high√ You should suspect that （）.

A.the engine was over filled
B.there might be a fuel leak
C.there might be a water leak
D.all of the above

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單項選擇題

A diesel engine is similar to a gasoline engine except that the former has no （）.

A.cross-head
B.cylinder
C.connecting rod
D.spark plug

單項選擇題

A common trouble with the fuel pump plungers or fuel valve spindle is （）.

A.broken down
B.stuck
C.oil leakage
D.carbonized