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← ScienceWhich outcome occurs when a steam turbine undergoes blade stall?
A)Reduced power output and efficiency✓
B)Increased shaft rotational frequency
C)Decreased turbine inlet temperature
D)Elevated condenser vacuum pressure
💡 Explanation
Stall disrupts airflow, triggering flow separation (stall) on blades, thereby reducing lift and increasing drag because the pressure gradient becomes adverse. Therefore, power conversion decreases, rather than pressure changes, due to inefficient transfer.
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