3. A pump draws water at 300 liters per second from reservoir A and lifts it to reservoir B as shown. The head loss from A to 1 is 20 times the velocity head in the 200 mm diameter and the head loss from 2 to B is 20 times the velocity head in the 150-mm diameter pipe. Assume your own reservoir B elevation then compute for the energy that must be supplied to the pump in kW if said appurtenance has an efficiency of 80%. Compute also the pressure at points 1 and 2. Reservoir A 200 mm pipe Elevation=-20 m Point 1 Point 2 Pump 150 mm Reservoir B

3. A pump draws water at 300 liters per second from reservoir A and lifts it to reservoir B as shown. The head loss from A to 1 is 20 times the velocity head in the 200 mm diameter and the head loss from 2 to B is 20 times the velocity head in the 150-mm diameter pipe. Assume your own reservoir B elevation then compute for the energy that must be supplied to the pump in kW if said appurtenance has an efficiency of 80%. Compute also the pressure at points 1 and 2. Reservoir A 200 mm pipe Elevation=-20 m Point 1 Point 2 Pump 150 mm Reservoir B

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 pump draws 24L/s of water from reservoir A and lifts it to reservoir B. The head lost from A to 1 is 3 times the velocity head in the 150mm suction line and the head lost from 2 to B is 25 times the velocity head in the 100mm discharge line. (A) What is the power delivered by the pump to the system in hp? (B) What is the pressure head in meters in point 1? (C) What is the pressure head in meters in point 2?
6. A centrifugal pump discharging 900 gpm and operates at 1800 rpm against a head of 120 feet has a power output of 30 hp. If the pump is to operate at 1200 rpm assuming efficiency remains constant. Determine the new discharge in gpm, the head and power.
Reservoir A supplies water to a nozzle having a diameter of 8 cm which discharges water 40 m below the reservoir water level at a velocity of 24m/s. a.Determine the horsepower produced by the jet b.Determine the loss of head in the pipeline and nozzle and the efficiency of nozzle.
A 90% efficient pump lifts water from a lower reservoir a shown in the figure. The head loss in the 150mm pipe is 3 times the velocity head in that pipe and the head loss in the 100mm pipe is 20 timew the velocity head in that pipe. A.If the desired flow rate is 20L/s ehat shoukd be the powet input of the pump in Kw? Choices: 42.9,28.8,32.0,38.6 B.Compute the pressure head, in m of water, at the suction line before the pump Choices: 12.39,10.29,9.74,7.56 C.Compute the pressure head,in m of water, at the discharge line right after the pump. Choices: 156.26,136.80,139.53,145.20
9.The pump shown delivers 115 li/s of oil, sg = 0.84, toreservoir D at elevation 72 m. The energy lost in thesuction line is 3.2 J/N and in the discharge line is 7.6 J/N. a.Compute the total head added by the pump. b.How many kW does the pump supply the system? c.If the pump is 85% efficient, how much power does it need?
7. A heavy Oil (y = 9000 N/m³) is flowing at a rate of 0.65 m³/s in the system shown. If the total head lost between point reservoir A to closed tank B is 2.5 m and the pressure at B is 70 kPa A) Compute the added energy produce by the pump B) Compute the power in hp that must be supplied by the pump to the flow C) Compute for the pressure head at point 1 if the pipe from A to 1 is 150 m long and 600 mm diameter, n = 0.011 EL 50m 600 mm El Om 70 kPa El 60 m
The pump draws water at 30 liters per second from reservoir A and lifts it to reservoir B as shown. The head loss from A to 1 is three times the velocity head in the 150mm diameter pipe and the head loss from 2 to B is twenty times the velocity head in the 100mm diameter pipe. Which of the following most nearly gives the powet delivered by the pump? Choices: 59.38 kW 75.14 kW 44.82 kW 53.96 kW
- Water is flowing at a critical depth of flow = 1.4 m in a channel shown in the figure below. Estimate the discharge and specific energy in the channel. 몰 0.5 1 2.4 m- 1.4 m
The following figure shows a pump that extracts water from a reservoir with a volumetric discharge rate of Q L/s. Assume all losses are negligible. a) What would be the pressure at points A and B, when the pump-motor system extracts P kW from the electric grid. The combined efficiency of the pump-motor system is 60%. b) Draw the Energy Grade Line (EGL) and Hydraulic Grade Line (HGL) for this system. Q = 0.055 L/s; P= 20 kW B 1.2 m Atmosphere C 3.0 m Diameter: 10 cm Pump Diameter: 15 cm
Two reservoirs A and B having elevations 250 m and 100 m respectively are connected by a 250 mm diameter pipe 250 m long. A turbine is installed between the two reservoirs. The flow of water in the pipe is 140 liters per second. Use C1 = 120. Compute for (a) the head loss in meters in the pipe due to friction, (b) the head in meters extracted by the turbine, and (c) the power generated by the turbine in kW
The 600 mm pipe shown conducts water from reservoir A to a pressure turbine, which discharges through another 600 mm o pipe into tail race B. The head lost from A to 1 is 5 times the velocity head in the pipe and the head lost from 2 to B is 0.2 times the velocity head in in the pipe. If the discharge is 700 L/s A) Compute for the total head lost 1. 05: Compute for the extracted energy cause by the turbine Compute for the hp given up by the turbine. V Answer A) EL 60m 600 mm 1.63 m 58.37 m 537.3 hp 600 mm o B ▷ EL 0 m
From a reservoir whose surface elevation is at 30 m, water is pumped to an elevated reservoir at an elevation of 95 m. The head loss in the 60 cm diameter suction pipe is 10 m and that of the 50 cm discharge pipe is 15 m. Determine the following if the discharge is to be maintained at 480 liters per second. Assume total head loss between the two reservoirs is 20 m. Compute the power input of the pump assuming it operates at 80% efficiency.