单项选择题
In a diesel engine, blow-by（）
A.increase exhaust back pressure B.causes excessive crankcase pressure C.can only be detected by a compression check D.decreases fuel consumption
单项选择题 A diesel engine will lose power if fuel injection occurs too late in the cycle, because the（）
单项选择题 Misalignment of the drive shaft and propeller shaft flanges can be detected by using a dial indicator or （）
单项选择题 Some diesel engines are supercharged with a （）
