Which risk increases when an imperfect heat engine using a Carnot cycle experiences unexpectedly reduced cooling?

A)Compression cycle pressure remains constant

B)Isothermal expansion phase transition slowdown

C)Engine thermal efficiency sharply decreases✓

D)Heat leakage bypasses working fluid

💡 Explanation

Reduced cooling decreases the temperature differential in a Carnot cycle. The engine thermal efficiency strongly depends on the temperature difference because the theoretical Carnot efficiency is limited; therefore efficiency will decrease significantly, rather than altering the thermodynamic equilibrium.

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Which risk increases when an imperfect heat engine using a Carnot cycle experiences unexpectedly reduced cooling?

💡 Explanation

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