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Which outcome occurs when differential thermal expansion compromises turbine blade seals?

A)Reduced thermodynamic efficiency is worsened
B)Stall margin gradually improves slowly
C)EGT decreases at lower speeds
D)Turbine life expectancy automatically increases

💡 Explanation

Efficiency decreases because leakage increases within the turbine stage via **tip leakage**. This increases losses therefore reduces overall power production rather than improving stall margin; different geometry would impact airflow properties.

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