单项选择题
A.droop B.dead banding C.dash potting D.hunting
Coolant can be lost from a diesel engine jacket cooling...
单项选择题Coolant can be lost from a diesel engine jacket cooling waster system by leakage from（）
A.cylinder head cracks B.piping joints C.pump leaking D.all of the above
Ring groove inserts are occasionally used on aluminum a...
单项选择题Ring groove inserts are occasionally used on aluminum alloy piston to（）
A.reduce the ring groove wear rate B.seal against crankcase vapors C.lessen the wear on aluminum part of the cylinder D.allow for the greater expansion rate of aluminum
A sudden drop in diesel engine cylinder compression pre...
单项选择题A sudden drop in diesel engine cylinder compression pressure can be caused by（）
A.a leaking fuel injector nozzle B.a clogged air filter C.excessively early fuel injection D.malfunctioning valves
