Fire truck draws water from an open constant-level reservoir

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Reference no: EM13711596

A fire truck draws water from an open constant-level reservoir through a hose of 0.2 ft² cross section. The water is discharged from the pump through another 0.2 ft² hose to a surge tank pressurized to 120 psig with air at the top. The pump adds 970 ft lb_f/slug of energy to the fluid. The water level in the surge tank is 3 ft above the pump centerline. From the surge tank the water flows steadily through a hose of 0.04 ft² area to a nozzle of 0.01 ft² area. The nozzle exit is held at the same level as the water free surface in the surge tank. Neglect all frictional losses and sketch the system.

Find the:

a) speed of the water leaving the nozzle

b) elevation of the pump relative to the reservoir

c) power required to drive the pump if it has an 80 % efficiency

d) maximum height above the reservoir that the stream of water exiting the nozzle can reach

Hint: You will need to define more than one CV to solve this problem!

Reference no: EM13711596

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