单项选择题
A.glazed liners or pistons
B.high lube oil pressure
C.excessive compression ratio
D.worn valve seats and valves
单项选择题 In a main propulsion turbocharged diesel engine, the speed of the turbocharger varies according to the （）
单项选择题 If you notice smoke coming fro the crankcase exhaust fan outlet of an operating diesel engine, you would suspect（）
单项选择题 When restarting a heavy fuel diesel engine that has been stopped for some time, the engine should（）