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← ScienceWhich risk significantly increases when exceeding a pump's NPSHr?
A)Increased pitting from cavitation erosion✓
B)Thermal runaway within the stator coils
C)Rotor imbalance from deposit buildup
D)Seal failure from excessive oil shear
💡 Explanation
Vapor bubbles collapse violently during cavitation erosion, because pressure recovery amplifies localized implosions. This exceeds the material's fatigue limit. Consequently, pitting occurs within the impeller, rather than other failure modes caused by imbalance or electrical overheating.
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