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Which risk increases when throttling wet steam in a steam turbine?

A)Erosion by liquid droplet impact
B)Oxidation rate of turbine blades
C)Overheating of the rotor hub
D)Decreased thermal cycle efficiency

💡 Explanation

Erosion increases because throttling causes expansion and a drop in pressure and temperature of wet steam. Therefore, more steam condenses releasing liquid water, leading to high-speed water droplets that cause erosion, rather than other thermal or chemical changes.

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