单项选择题
A crankshaft whose center of gravity coincides with its center line is said to be（） Ⅰ.statically balanced Ⅱ.dynamically balanced
A.Ⅰ only B.Ⅱ only C.both Ⅰ and Ⅱ D.neither Ⅰ nor Ⅱ
In a trunk type diesel engine piston, the thickness of ...
In a trunk type diesel engine piston, the thickness of the head or crown is determined by the（） Ⅰ.statically balanced Ⅱ.heat dissipation requirement
A condition contributing to diesel engine piston rings ...
A condition contributing to diesel engine piston rings sticking in the ring grooves, is insufficient ring clearance at the ring（） Ⅰ.gap Ⅱ.side
A.Ⅰonly B.Ⅱ only C.both Ⅰ and Ⅱ D.neither Ⅰ nor Ⅱ
An acceptable means of tightening connecting rod and ma...
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
