6313. 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) September 7, 2025 by Admin D = 1840 H0.5/N D = 1840 N/H0.5 H = 1840 D0.5/N D = 1840 H/N ✅ The correct answer is option A.