If the flame from combustion in the cylinder of a four-stroke engine past the piston into the space below the accumulation of flammable mixture would be ignited thus resulting in （）.

If the flame from combustion in the cylinder of a four-stroke engine past the piston into the space below, the accumulation of flammable mixture would be ignited, thus resulting in （）.

A.the crankcase explosion

B.lifting of the cylinder safety valve

C.a scavenge fire

D.opening of the manhole

答案解析

A