### The yearly energy cost for the motor of a pump

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##### Reference no: EM1311096

Question 1. A pump for a wastewater treatment plant has a motor with a nameplate rating of 20 HP. When the pump operates the measured power draw is equivalent to 15 HP.  The pump operates 80% of the time.  The energy company bills the plant at a rate of \$0.15 per kilowatt-hour of energy used.  Describe how to calculate the yearly energy cost for the motor.  Assume the motor is 100% efficient.  (Note also that 1 kilowatt-hour = 3,600 kJ although you don't necessarily need this conversion.)

Question 2. If you had been tasked to remove the water from New Orleans after Hurricane Katrina would you select a radial flow, mixed flow or axial flow pump for this purpose? Explain it briefly.

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