A fire pump delivers water through a 100 mm main to a hydrant to which is connected a 50 mm hose, terminating in a 20 mm nozzle. The nozzle is 5 m above the hydrant and 20 m above the pump. Assuming a total frictional loss of 20 m from the pump to the base of the nozzle, and a loss in the nozzle of 20 per cent of the velocity head in the jet, and neglecting air resistance, what gage pressure at the fire pump is necessary to throw a stream 25 m vertically above the tip of the nozzle?
A fire pump delivers water through a 100 mm main to a hydrant to which is connected a 50 mm hose, terminating in a 20 mm nozzle. The nozzle is 5 m above the hydrant and 20 m above the pump. Assuming a total frictional loss of 20 m from the pump to the base of the nozzle, and a loss in the nozzle of 20 per cent of the velocity head in the jet, and neglecting air resistance, what gage pressure at the fire pump is necessary to throw a stream 25 m vertically above the tip of the nozzle?
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A fire pump delivers water through a 100 mm main to a hydrant to which is connected a 50 mm hose, terminating in a 20 mm nozzle. The nozzle is 5 m above the hydrant and 20 m above the pump. Assuming a total frictional loss of 20 m from the pump to the base of the nozzle, and a loss in the nozzle of 20 per cent of the velocity head in the jet, and neglecting air resistance, what gage pressure at the fire pump is necessary to throw a stream 25 m vertically above the tip of the nozzle?
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