Q.

In a four stroke SI engine the inlet valve opens

A. at TDC and closes at BDC
B. 10? before TDC and closes 10? after BDC
C. 10? before TDC and closes 10? after BDC
D. 10? before TDC and closes 50? after BDC
E. None of the above
Answer» D. 10? before TDC and closes 50? after BDC
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