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← ScienceWhich outcome occurs when a centrifugal pump operates far to the left of its best efficiency point?
A)Increased radial thrust on impeller shaft✓
B)Formation of cavitation vapor bubbles
C)Increased pump motor efficiency rating
D)Decreased net positive suction head
💡 Explanation
Reduced flow operation in a centrifugal pump increases impeller radial thrust because static pressure distribution becomes uneven; therefore, radial thrust increases rather than expected performance, because off-design operation makes velocity profiles asymmetrical.
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