A pump is to deliver water at a rate of 1.4 m/ s from a sump to reservoir which is 10 km away through a steel pipe 1200 mm in diameter for a length of 5 km and the remaining through a PSC pipe of diameter 1000 mm. The elevation difference between the full tank level of the Weisbach friction factor (f) of 0.018 for steel pipe and 0.02 for PSC pipe with a pump delivery reservoir and the low water levei of the sump is 50 m. What is the Break Horse Power (in kW) requirement of the motor? Assume the pump house loss of 3.75 m and minor losses to be 10% of the friction losses. Use Darcy- efficiency of 80%.

An air-conditioning system is designed to have a ductwith a rectangular cross section 1 ft by 2 ft, as shown. Duringconstruction, a truck driver backed into the duct and made it atrapezoidal section, as shown. The contractor, behind schedule,installed it anyway. For the same pressure drop along the pipe,what will be the ratio of the velocity in the trapezoidal duct tothat in the rectangular duct? Assume the Darcy-Weisbach resistance coefficient is the same for both ducts.

Ex ....... HYDRAUE • The pump is to be connected to a rising main which has a diameter (D) of 400 mm and a length of 137 m.The entry exit and minor head losses in the pipeline can be taken as 80D in this particular situation. The friction loss can be approximated by h; = ALQ² / 1 2D5 with A=0.04. The static lift is 10 m. By considering a single pump (P). And two of the pumps in series (P+P) and parallel (P//P) determine: > the H-Q curve of the two pump combinations » Which combination will be capable of discharging at least 0.3 m³/s, with the ability to pump up to 0.35 m³/s if the need arises. %3D

Problem 2 A pump is needed in a water supply system. The water is being pumped out of a ground-level storage reservoir with water surface elevation of 149.27 ft and needs to pass over a hill 2 miles away, where the pipe centerline is at elevation 200.00 ft. The flowrate is 22 mgd, pipe diameter is 24 inches, Hazen-Williams friction factor is 110, and pressure at the crest of the hill must be at least 20 psi. (a) What head must the pump provide? (b) How much power will be added to the water? (c) What size motor should be purchased if the pump/motor combination has an efficiency of 80 percent?