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Which consequence results when thermal equilibrium isn't reached between stages in a multi-stage turbine?

A)Reduced overall turbine efficiency
B)Increased blade root stress
C)Decreased exhaust contamination
D)Elevated inter-stage lubrication needs

💡 Explanation

Reduced efficiency occurs because complete heat transfer (approach to thermal equilibrium) wasn't achieved between consecutive temperature stages; the mechanism is imperfect heat exchange. Energy is lost this incomplete energy transfer, because without equilibrium less work is extracted; therefore overall thermodynamic cycle efficiency lowers, rather than other mechanical impacts.

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