A centrifugal pump is used to lift water at Steve Gibbs @The Saylor

Question 25 / 33: A centrifugal pump is used to lift water at seventy-five gallons per minute against a head of 100 feet of water.The efficiency of the pump is 75%. Approximately, what is the power required by the pump?

A 1.9 W

B 190W

C 1.9kW

D 3.8 W

E 38 W

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Explanation:

Power = dm/dt g h/ efficiency = 75 gpm x 3.86 kg/gallon x 1 minute/60 seconds x 9.8 m/s² x 100 ft x 0.3048 m/ft/0.75 = 1.9 kW.

Quiz Home Page

https://www.jobilize.com/thermal-fluid-systems-mcq-quiz-by-dr-steve-gibbs

Thermal-Fluid Systems ME303

Author:

Dr.Steve GibbsProfessor

The Saylor Foundation

USA

Access: Public Instant Grading

Attribution: Dr. Steve Gibbs. Thermal-Fluid Systems. The Saylor Academy 2014, http://www.saylor.org/courses/me303/

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