單項(xiàng)選擇題A diesel engines crankcase oil level is found to be too high√ You should suspect that ().

A.the engine was over filled
B.there might be a fuel leak
C.there might be a water leak
D.all of the above


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1.單項(xiàng)選擇題A diesel engine is similar to a gasoline engine except that the former has no ().

A.cross-head
B.cylinder
C.connecting rod
D.spark plug

2.單項(xiàng)選擇題A common trouble with the fuel pump plungers or fuel valve spindle is ().

A.broken down
B.stuck
C.oil leakage
D.carbonized

3.單項(xiàng)選擇題A common trouble with the fuel pump plunger or fuel valve spindle is ().

A.water leakage
B.steam leakage
C.oil leakage
D.air leakage

4.單項(xiàng)選擇題A charge of fresh air is drawn into the engine cylinder and then () by the moving piston() very high pressure.

A.pressed;to
B.pressurized;with
C.pushed;in
D.compressed;to

5.單項(xiàng)選擇題A cast steel strong back is fitted in way of the combustion space to help absorb ().

A.flame temperature
B.fuel oil
C.air movement
D.gas forces