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2 Ans. Im 3 Solve for the following Problem: Due on 5/18 1 What average velocity in a 6" pipe will produce a flow of 1.0 mgd of water? Ans. 7.87 ft/sec What size pipe can carry 2.36 m/s at an average velocity of 3.0 m/s? A 12" pipe carrying 3.93 cfs connects to a 6" pipe. Find the velocity head in the 6" pipe. Ans. 6.21 ft Compute the lost head in a 150-mm pipe if it is necessary to maintain a pressure 231 kPa at a point upstream and 1.83 m below where the pipe discharges water into the atmosphere at the rate of 0.0556 m/s. Ans. 21.7 m 5 A large tank is partly filled with water, the air space above being under pressure. A 2" hose connected to the tank discharges on the roof of a building 50 ft above the level in the tank. The friction loss is 18 ft. What air pressure must be maintained in the tank to deliver 0.436 cfs on the roof? Ans. 32.1 psi 4 200 mm diameter 300-mm diameter 10.5 m/s A = 1.21 kg/m 13.2 m/s M=? Fig. 7-19 6 Water flows through a horizontal 150-mm pipe under a pressure of 414 kPa. Assuming no losses, what is the flow if the pressure at a 75-mm diameter reduction is 138 kPa? Ans. 0.11 m/s Water 50-mm diameter pipe 1.22 m 0-000631 m's 1.-11.38m Fig. 7-23 Fig. 7-24 7 Water is to be delivered from a reservoir through a pipe to a lower level and discharged into the air, as shown in Fig. 7-23. For the data given in the figure, find the vertical distance between the point of water discharge and the water surface in the reservoir Ans. 12.11 m The pressure inside the pipe at S must not fall below 23.9 kPa absolute. Neglecting losses, how high above water level A may points be located? Refer to Fig. 7-24. Ans. 6.7 m 8 S