CH7HW - dimensions for the upstream and downstream pipes...

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CSUS ENGR132 ZHOU HOMEWORK #7 1. A pump draws water through an 8 in. suction pipe at surface A, and discharges it through a 4 in-pipe horizontally into air at C with a velocity of 12 ft/s. the 4 in. To what height h above the water surface at A can the water be raised if 25 hp is delivered to the pump? Assume that the pump operates at 60% efficiency and that the head loss in the pipe between A and C is ݄ = 2 ܸ /2g. Assume α = 1.0 at all locations. (Answer: 120ft) 2. Assume that the head loss in the pipes is given by ݄ = 0.02 (L/D) (V²/2g and at exit by ݄ = (V²/2g), where V= velocity in pipe, D= pipe diameter, L= pipe length. The water surface elevations of the upper and lower reservoirs are 100 m and 70 m, respectively. The respective
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Unformatted text preview: dimensions for the upstream and downstream pipes are ܦ ௨ = 30 cm, and ܮ ௨ = 200m and ܦ ௗ = 15 cm, ܮ ௗ = 100m. Determine the discharge of water in the system. (Answer: 0.11m 3 /s) 3. What horsepower must be applied to the water to pump 3.0cfs ay 68°F from the lower to the upper reservoir? Assume that the head losses in the pipe is given by ݄ ௅ = 0.018(L/D)(V²/2g), loss is given ݄ ௅ = (V²/2g). (Answer: 49hp) where L is the length of the pipe in feet and D is the pipe diameter in feet, and at exit head Elevation = 70m L u =200m L d =100m Elevation = 100m D u =30cm D d =15cm...
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This note was uploaded on 05/22/2011 for the course ME 132 taught by Professor Dongmeizhou during the Spring '11 term at CSU Sacramento.

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