Q1: Water is to be pumped (whose characteristics below) from one large open tank into an apparatus working under a pressure of 2 atm. The pipe diameter is 0.15 m and the pipe length is 61 m. There are minor losses at the entrance, exit and throughout the pipe. The friction factor will be taken as 0.02. Efficiency of the pump =0.7 Calculate: a) The flow-rate and shaft-power needed when the pump is operated at 1000 rev/min. b) The flow rate and the power when the speed of the pump increased by 10%. c) The flow rate and the power when two pump operate at series. (2) Water K2 = 1.5 K = 1.0 3 m 0.15 m Diameter of pipe = Total pipe length = 61 m Pump %3D K = 0.5

Please solve question four

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?

Example -5.2- It is required to pump cooling water from storage pond to a condenser in a process plant situated 10 m above the level of the pond. 200 m of 74.2 mm i.d. pipe is available and the pump has the characteristics given below. The head loss in the condenser is equivalent to 16 velocity heads based on the flow in the 74.2 mm pipe. If the friction factor = 0.003, estimate the rate of flow and the power to be supplied to the pump assuming n = 0.5 Q (m³/s) 0.0028 0.0039 0.005 0.0056 0.0059 Ah (m) 23.2 21.3 18.9 15.2 11.0