Which is the correct relationship for a centrifugal pump? (Where, D = Impeller diameter, inches H = Head developed, ft of liquid pumped N = Speed of pump, rpm) ?
Correct answer: A. D = 1840 H0.5/N
- A. D = 1840 H0.5/N
- B. D = 1840 N/H0.5
- C. H = 1840 D0.5/N
- D. D = 1840 H/N
Explanation
For a centrifugal pump, the developed head is related to the impeller peripheral speed, which is proportional to DN; hence D varies as √H/N. The stated empirical form is therefore D = 1840√H/N.
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