Problem 2The inlet line of a pump is 4-nominal schedule 40PVC pipe that is 30 ft long and includes one elbowand one well-rounded inlet. The pump conveys 0.5ft3/s of water at 60°F from a tank. The net positivesuction head required by the pump is 8 ft.Determine where the location of the water level inthe tank should be with respect to the pump impellershaft to prevent cavitation.

Answered: Image /qna-images/answer/267c7ff2-c932-4c96-a3d2-b49386fc41ee.jpg

Answered: Problem 2 The inlet line of a pump is…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Assume that friction in the suction line is negligible. Toluene @ 35C is pumped from an open reservoir to a tank kept at a gauge pressure of 150 kPa. The pump itself is 3 m below the reservoir, while the discharge tank is 10m above the reservoir. While in the discharge line the friction head amounts to 7.5 m, determine the net positive suction head available for the pump. If the pump has an efficiency of 65%, determine the total power input. At the given temp, the density and vapor pressure of toluene are 862 kg/m3 and 40 mmHg.
2. A pump draws water from a lake delivered to a height of 50 meters above the lake and encounters 15 meters of headloss. Determine the pump power requirement in Kilo-Watts to deliver a constant supply of 500 Liters per second? The correct answer has a margin of 1 from exact answer. Velocity head is neglected.
The diameter of the discharge pipe of pump is 15 cm and that of intake pipe is 20 cm. The pressure gage at discharge reads 257 kPa and a vacuum gage at intake reads 195mm Hg. The flow rate is 90000 L/min and the applied torque in the pump shaft is 6.5 kN.m for a mechanical efficiency is 88% determine a.) the pump used; b.) the pumps to be used for a four-parallel pump arrangement.
A pump takes water at 60 F from a largereservoir and delivers it to the bottom of anopen elevated tank 25 ft above the reservoirsurface through a 3-in ID pipe. The inlet tothe pump is located 10 ft below the watersurface, and the water level in the tank isconstant at 160 ft above the reservoir surface.The pump delivers 150 gal/min. If the total loss of energy due to friction in the pipingsystem is 35 ft-lb, per 1bm of fluid, calculatethe horsepower required to do the pumping.The pump-motor set has an efficiency of 55%.
Water from a reservoir is pumped over a hill through a pipe 3 ft. in diameter, and a pressure of 35 psi is maintained at the summit, where the pipe is 300 ft above the reservoir. The quantity pumped is 55 cfs, and by reason of friction in the pump pipe there is 10 ft of head loss between the reservoir and the summit. What amount of energy must be furnished the water by the pump in kilowatts?
1. Assume a horizontal shaft handling water at 65 deg C (Pv=2.503 KPa, Density=980.5 m3/kg). The suction nozzle is 4.35 m below the pump centerline and the pressure gauge reading at this point is 221Kpag. Determine the NPSHa if the head loss is 0.82 m. If the NPSHr is 3m less than the NPSHa you got on question number 1, determine the pump suction specific speed at pump rotating at 1800rpm and Q=500gpm
A pump is designed to fill a pressurized tank rated at 1 MPa anda height of 23 m. Determine the power requirement of the pump inkW if the flowrate is measured at 20 m3/min.
Water at 20°C is to be pumped through 2000 ft of pipe fromreservoir 1 to 2 at a rate of 3 ft3/s, as shown in Fig. P6.62.If the pipe is cast iron of diameter 6 in and the pump is75 percent efficient, what horsepower pump is needed?
A water turbine operating at 85% efficiency is under a head of 100 m. If the constant discharge is 1000 gallon/sec, evaluate the operating speed of the turbine.
The turbine of a micro-hydroelectric power plant delivers 65hp at 75% efficiency. If the effective head is 115ft, how many cubic feet per minute of water must be used.
A 12-in diameter pump rotating at 600 rpm develops a head of 500 ft. Determine the peripheral velocity factor of the pump.
At a hydroelectric plant the difference in elevation between the surfaace of the water at the intake and at the tailrace is 183m (600ft). When the flow is 80 cfs, the friction loss in the penstock is 60 ft and the head utilized by the turbine is 460 ft. The mechanical friction in the turbine is 100hp, and the leakage loss is 3 cfs. Find (a) hydraulic efficiency; (b) volumetric efficiency; (c) power delivered to shaft; (d) brake horse power, (e) mechanical efficiency; (f) over-all efficiency.

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