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← ScienceWhich outcome results when a centrifugal pump operates significantly below its design flow rate?
A)Increased impeller blade cavitation erosion✓
B)Higher overall pump thermodynamic efficiency
C)Reduced radial thrust hydraulic loading
D)Lower net positive suction head required
💡 Explanation
Cavitation increases due to flow recirculation and turbulence at low flow rates. The increased turbulence affects the available Net Positive Suction Head, because decreased pressure leads to vaporization and therefore increased cavitation, rather than suppressed cavitation that a higher flow achieves.
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