A.it is dirty
B.it is leaky
C.it has been renewed
D.all the above
您可能感興趣的試卷
你可能感興趣的試題
A.specific volume
B.density
C.viscosity
D.calorific value
A.by an fuel valve
B.through an inlet valve
C.with an exhaust valve
D.from an outlet valve
A.piston crown
B.piston ring groove
C.piston skirt
D.piston ring area
A.one propulsion
B.two propulsions
C.two revolutions
D.one revolution
A.cooling water
B.vapor from the boiler
C.starting air
D.hot gases
最新試題
Routine monitoring of a diesel engine should include （）.
What causes diesel fuel to be ignited in the cylinder of an operating diesel engine?（）
The function of diesel engine piston compression rings is to （）.
In a simple mechanical governor, the （）.
A diesel engine piston ring face is in direct contact with the （）.
Lube oil cannot be efficiently filtered if its （）.
When fuel oil has seriously contaminated a diesel engine lubricating oil, you should （）.
Maximum horsepower of a diesel engine is attained （）.
A diesel engine is operating with excessively high exhaust temperatures at all cylindersTo correct this condition, you should FIRST （）.
The most important factor in engine performance is the actual power output at the end of the crankshaft available for doing workThis is known as （）.