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Which outcome occurs when maximizing thermal efficiency in engines?

A)Heat engine nears Carnot limit
B)Incomplete fuel-air mixture combustion
C)Piston rings experience thermal expansion
D)Exhaust pollutants decrease significantly

💡 Explanation

Thermal efficiency maximization leads to performance near the Carnot limit, because the engine attempts to minimize entropy production via irreversible processes; therefore, Carnot limitation occurs rather than increasing pollutants or directly affecting engine component wear.

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