单项选择题
A.fuel knock B.increased power C.low compression pressure D.high exhaust temperature
A crankshaft whose center of gravity coincides with its...
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
