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← ScienceWhich mechanism reduces maximum efficiency in internal combustion engines?
A)Irreversible heat transfer✓
B)Turbulent exhaust venting
C)Pre-detonation combustion
D)Incomplete fuel vaporization
💡 Explanation
Irreversible heat transfer reduces efficiency because the *Carnot efficiency* principle relies on reversible processes; this increases entropy across the engine cycle. Consequently, less work is extracted from each cycle because heat flows down a thermal gradient, rather than reversibly between reservoirs.
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