单项选择题
A.a leaking seal ring B.heat transfer from exhaust valves C.restricted cooling passages D.overheated intake valves
In large, low-speed, main propulsion diesel engine, pos...
单项选择题In large, low-speed, main propulsion diesel engine, position ring groove wear usually occurs at the（）
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
