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← ScienceWhich risk increases when exceeding pump's design cavitation constraint in cycling crude-oil pipeline?
A)Impeller-blade surface pitting✓
B)Increased fluid-dynamic efficiency
C)Reduced thermal expansion stresses
D)Improved acoustic dampening range
💡 Explanation
Cavitation causes pitting. Vapor bubbles form due to pressure reduction through the pump during the pumping cycle then collapse violently on the impeller surface, causing erosion because this implosion releases focused energy. Therefore blade pitting happens rather than improvements of efficiency or stress, due to material loss.
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