单项选择题
A.backfire through the air intakes B.develop less power under load C.have high firing pressures D.lift its cylinder relief valves
A condition that can increase the foaming tendency of l...
单项选择题A condition that can increase the foaming tendency of lube oil is （）
A.excessively high oil temperatures B.water or moisture contamination C.fuel dilution D.life its cylinder relief vales
In a diesel engine, when refitting piston rings you sho...
In a diesel engine, when refitting piston rings you should （） Ⅰ.check the ring gap at the smallest diameter of the cylinder Ⅱ. Remove carbon from the ring groove
A.Ⅰ only B.Ⅱ only C.both Ⅰ and Ⅱ D.neither Ⅰ nor Ⅱ
In a diesel engine, an integral liner is one in which t...
In a diesel engine, an integral liner is one in which the cooling water （） Ⅰ.flows through the cylinder liner jackets Ⅱ.touches the outer side of the liner
A.Ⅰ only B.Ⅱ only C.both Ⅰ and Ⅱ D.neither Ⅰ and Ⅱ
