单项选择题
If a diesel engine were running at 20% overload with a smoky exhaust, you should（）
A.stop the engine immediately to prevent damage B.increase lube oil pressure C.slow the engine allowing it to gradually cool D.decrease the cooling water it temperature to the water jacket
单项选择题 A substantial increase pressure could be an indication of a/an （）
单项选择题 A water jacket is placed around the exhaust manifolds of propulsion diesel engines to（）
单项选择题 An increase in diesel engine crankcase pressure generally indicates excessive（）
