单项选择题 A condition contributing to diesel engine piston rings sticking in the ring grooves, is insufficient ring clearance at the ring（） Ⅰ.gap Ⅱ.side

单项选择题 An acceptable means of tightening connecting rod and main bearing cap bolts is to measure the （） Ⅰ.torque applied to each nut and bolt assembly Ⅱstretch of each nut before and after tightening

单项选择题 Forcing the exhaust gases form the cylinder of an operating diesel engine with the aid of a blower is known as （）