单项选择题
What function is provided by the crankcase ventilation system on some diesel engines?（）
A.Increases the sludge forming tendency of lube oil B.Prevents the accumulation of combustible gases C.Improves lube oil cooling D.Improves cold weather starting
单项选择题 Increasing the valve clearance between a valve stem and rocker arm, will result in the valve （）
单项选择题 A diesel engine crankcase ventilation system （）
单项选择题 Regarding a Diesel engine crankcase, the general arrangement and installation should preclude the possibility of （）
