Problem 5: At its optimum point of operation, a given centrifugal pump with an impeller diameter of 550 mm delivers 3.8 m³/s of water against a head of 20 m when rotating at 1550 rpm. (a) If its efficiency is 78%, what is the brake power of the drive shaft? (b) For a homologous pump with a diameter of 900 mm is rotating at 1100 rpm, what would be the discharge, head, and shaft power? Assume both pumps operate at the same efficiency. (c) Compute the specific speed of both pumps.

Problem 5: At its optimum point of operation, a given centrifugal pump with an impeller diameter of 550 mm delivers 3.8 m³/s of water against a head of 20 m when rotating at 1550 rpm. (a) If its efficiency is 78%, what is the brake power of the drive shaft? (b) For a homologous pump with a diameter of 900 mm is rotating at 1100 rpm, what would be the discharge, head, and shaft power? Assume both pumps operate at the same efficiency. (c) Compute the specific speed of both pumps.

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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Problem 5: At its optimum point of operation, a given centrifugal pump with an impeller diameter
of 550 mm delivers 3.8 m/s of water against a head of 20 m when rotating at 1550 rpm. (a) If its
efficiency is 78%, what is the brake power of the drive shaft? (b) For a homologous pump with a
diameter of 900 mm is rotating at 1100 rpm, what would be the discharge, head, and shaft power?
Assume both pumps operate at the same efficiency. (c) Compute the specific speed of both pumps.

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