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← ScienceWhen a centrifugal pump operates far from its best efficiency point, which outcome becomes dominant because cavitation risk increases?
A)Decreased impeller and volute lifespan✓
B)Increased motor power consumption steadily
C)Stall-induced blade vibrations are amplified
D)Greater overall pump output efficiency
💡 Explanation
Operating away from the BEP increases recirculation because of internal flow disturbances creating low-pressure zones. This induces cavitation erosion of the impeller material rather than increasing efficiency. Therefore, impeller lifespan diminishes rather than motor load dramatically heightening or net pump output.
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