1.

In a four stroke cycle petrol engine, the inlet valve$?

A. Opens at top dead center and closes at bottom dead center
B. Opens at 20° before top dead center and closes at 40° after bottom dead center
C. Opens at 20° after top dead center and closes at 20° before bottom dead center
D. May open or close anywhere
Answer» C. Opens at 20¬¨‚àû after top dead center and closes at 20¬¨‚àû before bottom dead center


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