A fire pump delivers water through a 150 mm main to a hydrant to which is connected a 75 mm hose, terminating in a 25 mm nozzle. The nozzle is 3 m above the hydrant and 18 m above the pump. Assuming a total frictional loss of 18.5 m from the pump to the base of the nozzle, and a loss in the nozzle of 10 per cent of the velocity head in the jet, and neglecting air resistance, what gage pressure at the pump is necessary to throw a stream 30 m vertically above the nozzle?

At 1 to 3 , apply bernoulli's equationP1ϑ+v122g+z1=P3ϑ+v322g+z3+HL ,equation 1A1v1=A3v3 ,…

Answered: A fire pump delivers water through a…

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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A fire pump delivers water through a 150 mm main to a hydrant to which is connected a 75 mm hose, terminating in a 25 mm nozzle. The nozzle is 3 m above the hydrant and 18 m above the pump. Assuming a total frictional loss of 18.5 m from the pump to the base of the nozzle, and a loss in the nozzle of 10 per cent of the velocity head in the jet, and neglecting air resistance, what gage pressure at the pump is necessary to throw a stream 30 m vertically above the nozzle?

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