The rate of flow of water in a pump installati is 60.6 kg/sec. The intake static gage is locate 1.22m below the pump centerline and reads 68.95kPa gage; the discharge static gage is 0.61m below the pump centerline and reads 344.75 kPa gage. The gages are located close the num much as possible. The or of t

The rate of flow of water in a pump installati is 60.6 kg/sec. The intake static gage is locate 1.22m below the pump centerline and reads 68.95kPa gage; the discharge static gage is 0.61m below the pump centerline and reads 344.75 kPa gage. The gages are located close the num much as possible. The or of t

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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For the following pump-pipe system below, how will the discharge and pump head change if a smaller pump in the same family is used to replace the current pump? Increase or decrease? EB EA Head (ft) 350 300 250 225 200 150 100 50 0 0 5 10 O Pump head will decrease; discharge will decrease. O Pump head will increase; discharge will increase. O Pump head will increase; discharge will increase. O Pump head will decrease; discharge will increase. 15 20 Discharge (cfs) System head curve 25 H₂ -Intersection point Pump characteristics 30 35 40
A fan is used to blow air (density=1.15 kg/m3) in a duct. A pitot tube is placed in the duct as shown. The static pressure in the duct is measured with a wall tap and pressure gage. Use the gage readings to determine the velocity of the air. note: Pitot tube is used to measure the air total pressure. Mind on the head to be calculated if it is already in air. x 103 Pa Ptot tabe 12 x 103 Pa
Determine the mechanical efficiency of a centrifugal water pump which has an input of 3.6 Hp if the pump has an 8 inches nominal size suction and 6 inches nominal size discharge if it handles 150 gpm of water at 150°F. The suction line gage shows4” Hg vacuum and the discharge gage shows 26 psi. The discharge gage is located 2 feet above the center of the discharge pipe line and pump inlet and discharge lines are at the same elevation.
A right cylindrical container 4 m. diameter is 3 m tall. A 50 mm diameter hole is provided at the bottom of the container to drain the water when necessary. If it is full of water, how long in hours does it take to empty the container from the instant the hole is opened? Coefficient of velocity and coefficient of contraction are both equal to 1.0. A.1.39 hoursC.1.13hoursB.1.26 hoursD.1.49hours
4. A pump is used for the pumping of water from Tank A into Tank B in which the height difference between the surface levels of water is 20 m. The pipe diameter is 400 mm and the pipe length is 2500 m, the coefficient of friction is f 0.0025 and the pump works at a speed of 700 rpm. The characteristics of the pump are shown in Table 4 below You are required to: (a) (10 points) Intepret pump characteristic and system characteristic ina graph. (b) (10 points) Calculate the input and output power at the operating point. 0.1 0.2 0.3 0.35 0.4 0.5 15 17 18 16 14 O30 60 SI83.80 45 H. (m) 11 Table 4: Data of the pump from the Manufacturer
Oil at 38 deg. Celsius is being drawn from a closed tank having a pressure of 70 kPa gage. The level of oil in the tank is 2.5m above the pump centerline. The suction line friction loss is 0.6m. The vapor pressure of the gasoline is 48 kPa absolute and its specific gravity is 0.82 Determine the NPSH in meters available. choices: a. 19.36 b. 17.23 c. 4.64
6. A pump draws water from a sump through a vertical 6" pipe. The pump has a horizontal discharge pipe 4" in diameter that is 10.6 ft above the water level in the sump. While pumping 1.25 cfs, gages near the pump at entrance and discharge read -4.6 psi and +25.6 psi, respectively. The discharge gage is 3.0 ft above the suction gage. Compute the horsepower output of the pump and the head lost in the 6" suction pipe.
2. Determine the water horsepower and the mechanical efficiency of a centrifugal water pump which has an input of 2611 watts, if the pump has an 8 in.nominal size suction and 6 in.nominal size discharge and handles 150 gpm of water at 150 deg.F (specific volume is 0.01634 ft3/Ibm). The suction line gage shows 4 in.Hg vacuum, and the discharge gage shows 26 psi. The discharge gage is located 2 ft above the center of the discharge pipe line and the pump inlet and discharge lines are at the same elevation.
The air is measured at 20 deg. C and 679mm Hg. The duct diameter is 744 mm while the discharge diameter is 340mm The fan draws 4 m^3/s air and the static pressure measured is 2 cm water Determine the power output in kW Answer should be round off to 2 decimal places
In the pumping system shown below, determine the following. a. Head loss at suction in m b. Head loss at discharge in meters c. Total head losses in meters d. Total dynamic head developed by the pump in meters e. Water Power in KW f. Brake Power in KW g. Energy consumption for 15 hours operation in KW-hr h. Line current drawn by the 3-Phase motor drive in amperes i. Pumping cost in Pesos/Day if electricity costs P7.00/KW-hr Figure: Other Data Water Temperature: 20∘C Suction Line 5−20 m 1−90∘ Elbow 1− Check Valve (Fully Open) Pipe Material: Galvanized Iron ND=100 mm Discharge Line L=50 m 12−90∘ Elbow 1− Gate Valve (Fully Open) 1− Check Valve Pipe Material: Galvanized Iron ND =80 mm Pump Efficiency: 75% Motor Efficiency: 82% Volts: 220 V Power Factor: 92%
A pump has a 100 mm diameter suction pipe and a 75 mm discharge pipe. The capacity is 15 L/s of water A water- mercury manometer is installed in the inlet which reflects a vacuum pressure of 198mm of Hg The mercury level on the suction side is 100 mm below the pipe centerline. The pressure gauge 200 mm above the pump inlet recorded a pressure of 0 95 bar. The measured input power was 3.2 kW Find the head added by the pump. Select the correct response(s) 27.14 m 24.13 m 11.13 m 13.14 m
A single-stage centrifugal pump having a suction pipe 254 mm in diameter anda discharge pipe diameter of 5 inches is being tested and found out to discharge 48 lps ofwater. A pressure gage connected to the inlet pipe reads 118 mm Hg vacuum and adischarge gage reads 150 kPa at a distance 100 cm above the point where the inletpressure was measured. If the kW rating of the driving motor is 12 kW, calculate a) thepump efficiency. b) if this pump runs at 1800 rpm, what will be the new discharge rate,head, and power developed if the pump speed was increased to 3600 rpm? Assumeconstant efficiency. c) Determine the pump type.