General Studies · IC Engines
In a four-stroke diesel engine, which valves are closed during the expansion stroke?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Only the exhaust valve
- 2Neither inlet valve nor exhaust valve
- 3Only the inlet valve
- 4Both inlet and exhaust valves✓
Correct answer
Both inlet and exhaust valves
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