With increase in pump speed, its NPSH requirement_________________?
Correct answer: D. Increases
- A. Decreases
- B. Can either increase or decrease; depends on other factors
- C. Remains unaltered
- D. Increases
Explanation
Increasing pump speed generally increases flow velocity and the velocity-related losses at the suction inlet, so the required NPSH rises. This is why high-speed operation increases the risk of cavitation.
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