单项选择题
A.top of the ring groove B.back of the ring groove C.bottom of the ring groove D.piston ring end clearance
Diesel engine blow-by is the leakage of combustion gase...
单项选择题Diesel engine blow-by is the leakage of combustion gases past the （）
A.oil rings only B.compression and scraper rings C.cylinder liner sealings D.cylinder liner ring grooves
In a diesel engine, blow-by is a result of combustion g...
单项选择题In a diesel engine, blow-by is a result of combustion gases leaking into the crankcase past the （）
A.wrist pin bushings B.compression rings C.cylinder liner seals D.cylinder liner sealing ring
A centrifuge will satisfactorily remove which of the fo...
单项选择题A centrifuge will satisfactorily remove which of the following contaminants from fuel oil?（）
A.Gasoline B.Water C.Lubricating oil D.sulphur compounds
