The numbers in the bottom corner are the answers. 6. A pump draws water from a well 4m below its centreline through 8m of 125mm diameterpipe. It delivers freely at 22m above the pump centreline through 60m of 75mm diameter pipe.Both pipes are "smooth".(a) What are the pressures at the pump inlet and outlet when the flow is 20L/s?(b) What energy is added to the flow by the pump?(c) What power is required to drive the pump at this flow rate if the pump efficiency is 70%?(-41.9kPa, 331kPa, 382J/kg, 10.9kW)

Answered: 6. A pump draws water from a well 4m…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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A pipe 2000 m in length witha flow rate of 2 m'/s. At the end of the 600 mm pipe, a valve is provided. If the water in the supplied tank before it flows into the pipe is compressed at 2 Mpa with a volume of 2 m and a volume of 1.99 m at a pressure of 4 Mpa. Find the pressure if the valve is closed in 20 seconds. O 3712 kPa O 2678 kPa O 4474 KPa O 1415 kPa
Need only a handwritten solution only (not a typed one).
At night, water is pumped from a treatment plant reservoir through distributing piping to an elevated storage tank. Assume no other withdrawals from the system. The water surface in the supply reservoir is at 3m elevation, the lift pump elevation is 6m, the water elevation in the elevated tank is 42m. The pipe network maybe considered equivalent to 1500m of 250mm diameter. Use C=100. There is a supply of 60 Liters/sec. to the tank. a. Compute the head loss of the 250mm diameter pipe. b. Compute the pump discharge pressure required to supply a flow of 60L/s to the tank, c. Compute the slope of the energy gradient
At night, water is pumped from a treatment plant reservoir through distributing piping to an elevated storage tank. Assume no other withdrawals from the system. The water surface in the supply reservoir is at 3m elevation, the lift pump elevation is 6m, the water elevation in the elevated tank is 42m. The pipe network maybe considered equivalent to 1500m of 250mm diameter. Use C=100. There is a supply of 60 Liters/sec. to the tank.a. Compute the head loss of the 250mm diameter pipe. b. Compute the pump discharge pressure required to supply a flow of 60L/s to the tank, c. Compute the slope of the energy gradient.
A 450mm pipe is connected by a reducer to a 200mm pipe. Points 1 and 2 are at the same elevation. The pressure at 1 is 150 kPa. The discharge 1 is 25 L/sec. Flowing from 1 to 2 and the energy lost from 1 to 2 is equivalent to 15 kPa.a) compute the pressure at 2 if the liquid is water.b) compute the pressure at 2 if the liquid is oil (sg = 0.80)c) compute the pressure at 2 if the liquid is molasses (sg = 1.5)
Calculate the mechanical power [hp] required on the pump shaft considering the hydraulic system Shown. The pipe is made of commercial steel (roughness = 0.0002 ft) and has two different diameters, up to the pump inlet the pipe is 2 inches with a length of 100ft and from the pump outlet the pipe is 4 inches with 400ft. All elements are screwed The flow rate circulating through the system is 0.5 ft3/s and the efficiency of the pump is 85%. The density of water is 1.94 slug/ft3 and has a viscosity kinematics 1.1x10-5 ft2/s
3. A pump is used to transport water at the rate of 0.075 m³/s from a reservoir 20 m above the pump to a free discharge 35 m above the pump. The pressure on the intake side of the pump is 150 kPa and the pressure on the discharge side is 450 kPa. All pipes are commercial steel of 15 cm inner diameter. Determine (a) The head supplied by the pump (b) The total head loss between the pump discharge and point of free discharge. Z₁=20 m 1 P₂ = 150 kPa 2 面 3 D=15 cm A P3=450 kPa 4 Free Discharge Z4 = 35 m
A pipeline 200 meters long delivers water from an impounding reservoir to a service reservoir with the difference in water levels of 20 meters. The pipeline of commercial steel is 400 mm in diameter. It has two 90 degree flanged elbows, a check valve, and an orifice (K_m= 2.5). Determine the flow through the pipe. Use a water temperature of 20 degrees Celcius.
Determine the available NPSH for the system shown in Fig. 13.38 (b). The fluid is water at 80°C and the atmospheric pressure is 101.8 kPa. The water level in the tank is 2.0 m below the pump inlet. The vertical leg of the suction line is a DN 80 Schedule 40 steel pipe, whereas the horizontal leg is a DN 50 Schedule 40 pipe, 1.5 m long. The elbow is of the long-radius type. Neglect the loss in the reducer. The foot valve and strainer are of the hingeddisk type. The flow rate is 300 L/min.
A centrifugal pump delivers water at the rate of 50 kg/s. The inlet and outlet pressures are 2 bar and 6.2 bar respectively. The suction is 2.2m below the centre of the pump and delivery is 8.5m above the centre of the pump. The suction and delivery pipe diameters are 200mm and 100mm respectively. Determine the capacity of the electric motor considering the efficiency of motor as 80% to run the pump.
Pipe A) is 100 8-96 A certain part of cast iron piping of a water distribu- tion system involves a parallel section. Both parallel pipes have a diameter of 30 cm, and the flow is fully turbulent. One of the branches (pipe A) is 1000 m long while the other branch (pipe B) is 3000 m long. If the flow rate through pipe A is 0.4 m³/s, determine the flow rate through pipe B. Disre- gard minor losses and assume the water temperature to be 15°C. Show that the flow is fully rough, and thus the friction factor is independent of Reynolds number. Answer: 0.231 m³/s KIAU A B I 30 cm 30 cm 1000 m 3000 m 0.4 m³/s
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