Q:
In a four stroke cycle petrol engine, the expansion __________
Answer & Explanation
Answer: B) starts at 30º before top dead center and ends at 50º before bottom dead center
Explanation: In a four stroke cycle petrol engine, the expansion starts at 30º before top dead center and ends at 50º before bottom dead center while the compression starts at 40º after bottom dead center and ends at 30º before top dead center.
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