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← ScienceWhich effect occurs on saturated steam when pressure drops impulsively below saturation following rapid turbine valve closure?
A)Violent formation of cavitation bubbles✓
B)Isoenthalpic expansion achieves superheating
C)Turbine blades experience thermal shock
D)Condensate subcooling decreases sharply
💡 Explanation
Uncontrolled pressure reduction leads to vapor bubble implosion, because the saturation temperature falls, leading to nucleate boiling rather than controlled condensation. This cavitation erodes material; therefore, understanding onset reduces damage risks rather than managing temperature gradients.
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