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Which outcome accelerates when a heat engine's exhaust restriction increases?

A)Engine overheating and piston damage
B)Increased efficiency of heat transfer
C)Reduced vibration within engine mounts
D)Enhanced lubrication of rotating parts

💡 Explanation

Engine overheating and piston damage occurs because increased exhaust restriction reduces heat dissipation, driving up cylinder temperatures. Consequently, thermal stress intensifies, leading to accelerated fatigue failure, rather than improved efficiency, lesser vibrations, or enhanced lubrication.

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