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← ScienceWhich risk increases when exceeding the operational head pressure of a centrifugal pump?
A)Increased internal cavitation and impeller erosion✓
B)Decreased motor shaft RPM and lubrication
C)System oscillations increasing pipe fatigue
D)Increased volumetric efficiency and pumped flow
💡 Explanation
Increased head pressure drops below the fluid's vapor pressure, causing cavitation because energy is locally dissipated in forming vapor bubbles. Localized pressure drops create these cavities; therefore, erosion intensifies, rather than reducing flow or stabilizing oscillations.
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