If the head is doubled in & centrifugal pump, the power required will increase in the ratio of__________________?
Correct answer: B. 23/2
- A. 23
- B. 23/2
- C. 25/2
- D. 21/3
Explanation
For a centrifugal pump, head varies as speed squared and power varies as speed cubed. Doubling the head therefore increases speed by √2 and power by (√2)^3 = 2^(3/2), corresponding to option b.
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