One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； May 28th
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Multiple-choice question: What are the measures to prevent or eliminate cavitation in a centrifugal pump during operation? ( ) A. The pump should operate at the specified speed. B. When operating at low flow rates, open the return valve to ensure a minimum flow rate at the pump inlet and to limit the maximum flow rate, thereby keeping the pump within its safe operating range. C. Avoid using the pump inlet valve to regulate the flow rate during operation. D. Replace the impeller regularly according to its cavitation life. Answer: ABCD
A The pump should operate at the specified speed. B When operating at low flow rates, open the return valve to ensure a minimum flow rate at the pump inlet and to limit the maximum flow rate, thereby keeping the pump within its safe operating range. C Avoid using the pump inlet valve to adjust the flow rate during operation. D Replace the impeller regularly according to its cavitation life