3–87 The pump of a water distribution system is powered by a 15-kW electric motor whose efficiency is 90 percent. The water flow rate through the pump is 50 Lis. The diameters of the inlet and outlet pipes are the same, and the elevation difference across the pump is negligible. If the pres- sures at the inlet and outlet of the pump are measured to be 100 kPa and 300 kPa (absolute), respectively, determine the mechanical efficiency of the pump. Answer: 74.1 percent

3–87 The pump of a water distribution system is powered by a 15-kW electric motor whose efficiency is 90 percent. The water flow rate through the pump is 50 Lis. The diameters of the inlet and outlet pipes are the same, and the elevation difference across the pump is negligible. If the pres- sures at the inlet and outlet of the pump are measured to be 100 kPa and 300 kPa (absolute), respectively, determine the mechanical efficiency of the pump. Answer: 74.1 percent

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Reservolr
40 m
Pump-
turbine
Lake
FIGURE P3-86
3-87 The pump of a water distribution system is powered
by a 15-kW electric motor whose efficiency is 90 percent.
The water flow rate through the pump is 50 Lis. The
diameters of the inlet and outlet pipes are the same, and the
elevation difference across the pump is negligible. If the pres-
sures at the inlet and outlet of the pump are measured to be
100 kPa and 300 kPa (absolute), respectively, determine the
mechanical efficiency of the pump. Answer: 74.1 percent

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