你可能感興趣的試題

The engine will fail to start unless （）.

A.the pressure of the starting air is high enough
B.there is enough air in the air reservoirs
C.the air is supplied into the cylinders in the appropriate sequence
D.all of the above

單項(xiàng)選擇題

“The engine not obtaining the sufficient speed for firing” means that （）.

A.the start fails
B.the fuel pumps will be put into operation
C.the fuel valves are damaged
D.the combustion process will take over