Erosion and pits formation on the impeller of a centrifugal pump may be due to________________?
Correct answer: A. Cavitation
- A. Cavitation
- B. Low speed of impeller
- C. Its operation with delivery valve closed for considerable time after starting the pump
- D. Off centering of pump with motor
Explanation
Cavitation bubbles collapse near the impeller surface and generate shock waves, producing characteristic pitting and erosion. Low speed, valve closure and misalignment do not directly create this pattern of damage.
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