单项选择题
A.Worn intake valve guides B.Pitted pre-combustion chambers C.Loose valve tappets D.High exhaust back pressure
Late fuel oil injection in a diesel engine can result i...
单项选择题Late fuel oil injection in a diesel engine can result in （）
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
