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The last edit to this post was made by 3983596_FPPZ on 2018-11-21 at 21:37. The magnitude of the inlet pressure has a direct impact on which of the following parameters of a centrifugal pump? (Multiple choice) A. Outlet pressure B. Head C. Flow rate D. Cavitation E. Shaft power Answer: AD. A. Outlet pressure = Pump head x Specific gravity + Inlet pressure; therefore, option A is correct； Head is a performance parameter inherent to the pump itself; it remains unchanged regardless of the medium used. It is only after the medium is determined that the outlet pressure becomes related to head, as explained in answer A. Therefore, answer B is incorrect ； C: Flow rate, just like head, is an inherent performance parameter of the pump itself; therefore, option C is incorrect ； The cavitation condition of pump D is directly affected by the inlet pressure; if the inlet pressure is much higher than the vaporization pressure of the medium, the pump is less likely to experience cavitation. Otherwise, the pump is prone to cavitation and vacuum conditions, rendering it unusable. Answer D is correct. The power on the E-axis is a value calculated based on flow rate, head, specific gravity, and efficiency; it represents the power consumed by the pump. As long as the pump is operating properly, this value has nothing to do with the inlet pressure. Therefore, answer E is incorrect