Question 4 / 40:  How high can a 5 hP pump move 5 gal/min of water in Earth's gravity if there are no frictional losses?
A  1.2 m
B  12 m
C  120 m
D  1200 m
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Explanation:

5 hp = 3.67 kW. 5 gal/min = 0.315 kg/s for water. h = 3670 kW/(0.315 kg/s x 9.8 m/s2). In most situations the frictional or head losses would be significant and the pump would not be able to achieve that height.

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Fluid Mechanics ME201

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Attribution:  Stephanie Redfern and Tuan Dinh. Fluid Mechanics. The Saylor Academy 2014, http://www.saylor.org/courses/me201/
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