单项选择题
A.cause blow-by B.chemically attack the piston skirt C.form an emulsion of lube oil and water D.raise the piston temperature
A.An increased air temperature differential between the cooler inlet and outlet B.A decrease in the air pressure differential across the cooler C.Excessive condensate forming in the air box D.A decrease in the air temperature differential between the cooler inlet and outlet
A.lube oil pumping B.rotating rings C.gas pressure behind the ring D.passage of hot gases