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← ScienceWhich effect occurs as coolant flow increases past a pump's design threshold?
A)Cavitation erosion begins impacting impeller✓
B)Net positive suction head increases
C)Pumped fluid's viscosity is greatly increased
D)Systemic laminar flow spontaneously appears
💡 Explanation
Cavitation erosion is worsened above a pump's flow threshold because increased fluid speed creates low-pressure zones that cause vapour bubbles to form and collapse. The mechanism is inertial collapse, therefore cavitation rather than viscosity changes occurs, because viscosity does not change significantly.
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