HVAC · Practice-Exam-1 · Problem 62
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HVAC · Practice-Exam-1 · Problem 62
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Problem: A pump delivers 250 gpm and produces 125 feet of head.
Approach: So, oftentimes we use the hydraulic horsepower formula WHP equals Q delta H over 3960.
Key step: The fluid being distributed has a density of 71 pounds per cubic foot and the pump is 80% efficient.
Watch out: We're going to use a similar formula here, but we need to accommodate for the fact that the density is not that of water.
Result: And that gives us a BHP of 11.2 horsepower.
✅ Answer: C
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