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← ScienceWhich outcome results when exceeding pump's Net Positive Suction Head Required (NPSHR)?
A)Vapor pressure falls approaching cavitation✓
B)Suction Specific Speed dramatically decreases
C)Volumetric efficiency is linearly reduced
D)Kinetic energy converts to thermal energy
💡 Explanation
When the available suction pressure falls below NPSHR, the vapor pressure falls as boiling occurs— cavitation. This destabilizes the pump performance as the liquid vaporizes, rather than thermal energy conversion only heating the liquid because momentum increases and affects pressure.
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