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Which outcome results when a Stirling engine cycles too rapidly?

A)Reduced heat exchanger effectiveness
B)Increased isothermal compression work
C)Higher regenerator thermal efficiency
D)Decreased indicated mean effective pressure

💡 Explanation

Reduced rapid cycling time leads to incomplete heat transfer during the cycles. Therefore, the heat exchanger effectiveness diminishes because the **thermal inertia** resists temperature change at operating frequency, rather than operating according to thermodynamic equilibrium during heat exchange.

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