A fluid is pumped at the rate of 10 lb/sec to a height of 55 ft. The horse power required is _____________ hp? / Fluid Mechanics for Chemical / By admin A fluid is pumped at the rate of 10 lb/sec to a height of 55 ft. The horse power required is _____________ hp? A. 1 B. 10/55 C. 5.5 D. 1/55