Reservoir A and B have elevations of 100 m and 160 m respectively. A pump is installed near reservoir A to pump the water from A to B. The rate of flow in the pipe is 650 liters/sec. If the head loss in the pipeline is 8.22 m, compute the horsepower required to pump the water to B

Water is drawn from an intake tower in Lake Ontario through a 3-km long precast reinforced concrete pipeline (Hazen-William’s C = 120) and delivered to the wet well of a low lift pumping station on shore which in turn supplies a water treatment plant. The pumping station is sized to deliver and will be operating at the maximum day flow rate of 2.65 m3/s. (a) If the design water elevation in the wet well is 70 m when the lake level is 74 m above MSL, determine the most economical pipe size for the intake (neglect local losses). (b) Compare the entrance and exit losses to the pipe friction losses to justify the assumption in (a). The entrance and exit loss coefficients can be assumed to be 1. (c) Sketch the hydraulic and energy grade lines. (d) Explain what would happen if the intake pipeline’s capacity was reduced but the pumping station is still operating at the same flow rate.

5. It is desired to deliver 5 gpm at a head of 640 m in a single stage pump having specific speed not to exceed 40. If the speed is not to exceed 1352 rpm, how many stages are required?