Please solve question three Question Two (C~A three stage C.P. has impellers (cm) in diameter and (1.8cm) wide at outlet. The vanes are curved back atoutlet at (45°). The manometric efficiency is (90%) and the overall efficiency is (80%). After drawing thevelocity triangles, determine: (1) The head generated by the pump when running at (1000 R.P.M.) delivering(50 L/S).(2) The shaft power in KW.Question Three (A single acting reciprocating pump has a piston diameter (20 cm) and stroke length (30 cm) and the crank isrunning at (30 R.P.M.). The pump raises water to a height of (20 m) above its centre through a delivery pipe (25m) long and (10 cm) in diameter. The coefficient of friction is (0.02) and the atmospheric pressure is (10.3mH₂O). Determine:(1) The pressure head on the piston in the beginning, middle and the end of delivery stroke.(2) The power required to drive the pump (work done per second by the pump) in KW if maximum loss of headdue to friction in section pipe (Hs (max)) = 1.38 m, and section head (4 m).Question Four (A pipe of (300 mm) diameter conveying (0.25m³/s) of water has a bend as shown in a horizontal plane.Find the magnitude and direction of the resultant force exerted on the bend if the pressure of flow is (200kpa).

A three stage C.P. No of stage = 3 Diameter of outlet D2= 40 cm =0.4 m Width pof outlet B2 = 0.018m…

Answered: Question Two ( A three stage C.P. has…

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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3. A centrifugal pump of 350 mm diameter running at 1000 r.p.m. devclops a hcad of 18 metres. The vanes are curved back at an angle of 30° to the langent at outlet. If the velocity of flow is constant at 2-4 m/s, find the manometric efficiency of the pump. (Ans. 76-4%)
A centrifugal pump having an impeller of diameter 500 mm delivers 140 litres of water per sccond. The velocity of flow is 1 m/s and the vanes are curved back at outlet at 30° to the wheel tangent. If the impeller speed is 400 r.p.m., find the power to drive the pump. (Ans. 12-9 kW) 3.
18. A centrifugal pump has, to work against a head of 25 metres at a speed of 850 rpm.. The flow component of the velocity at outlet is 2 5 metres/second. The outlet vane angle is 40°." If the discharge of the pump is 0-25 cumec find (i) The diameter of the impeller and (ii) The width of the impeller at outlet. Neglect losses. (0:387 m; 0*082 m)
19. A centrifugal pump delivering 0 04 cumec of water to a height of 20 metres through a 10 cm diameter pipe 100 metres long. If the overall efficiency of the pump is 75% find the h.p. required to drive the pump. Take f 0'01. (51'83 hp)
2. A centrifugal pump having an overall efficiency of 75% is discharging 30 litres of waler per second througha pipe of 150 mm diameter and 125 m long. Calculate the power required to drive the pump, if the water is lifted through a height of 25 metres. Take coefficient of friction as 0-01. (Ans. 11-7kW)
Find the specific speed of a double suction centrifugal pump delivering 1.5 m³/s against a net head of 15 m when running at 725 r.p.m. state the type of impeller to be employed for this pump.
Q-- Consider the following data relating toperformance of a centrifugal pump:speed 1200 rpm, flow rate 30 L/s, head 20 m, and power 5 kW. If the speed of the pump is increased to 1500 rpm, assuming the efficiency isunaltered, Find the new flow rate and head.
a pump operating at 1750 rpm delivering 600 gpm against total head of 200 tt. changes in the piping system have increase the total head of 450 tt. At what RPM should the pump be operated to achieve thus new head at the same efficiency?
Select the number and type (ns ) of centrifugal pumps for a pumping station that must deliver 130 m3/s against a head of 50 m at 180 rpm. Assume NPSH on pumps is +5 m. Use identical single-stage pumps in parallel. Ans. 110 pumps
4. A centrifugal pump delivers water to a height of 22 metres at a speed of 800 r.p.m. The velocity of flow is constant at a speed of 2-0 m/s and the outlet vane anglc is 45°. If the pump discharges 225 litres of water per second, find the diameter of the impeller and width of the impcller at oudet. (Ans. 375 mm: 95 mm)
QUESTION 1:A centrifugal pump consists out of an impeller, diffuser and casing and is powered by 300kW (shaft power) and rotates at 96.3 rad/s. The flow rate generated by the machine is54.7 Kilo-litres/min. The impeller blade inlet angle and width is 23° and 180 mmrespectively. The blades occupy 12% of the impeller area and the water is assumed toenter the impeller radially. Suction and delivery pipes are equal in size.Determine:1.1The impeller inlet (i) diameter and inlet blade velocity.(Hint - Substitution: ln in terms of D and U, in terms of D, both sub into Tan of Blade inlet angle,only unknown is then solving for Dz)1.2.If the pump has a mechanical efficiency of 80%, calculate the blade velocity atoutlet (U.) and outlet whirl velocity Vw.. Assume the blade exit angle equal to theguide vane angle. (Hint - Substitution: Write Vw in terms of U, sub in Euler equation onlyunknown then is solve for Vwo)1 3Impeller outer diameter.1.4,If the flow through velocity is consistent through the…
A "spa tub" is to be designed to replace bath tubs in reno- vations. There are to be 6 outlet nozzles, each with a di- ameter of 12 mm, and each should have an outlet velocity of 12 m/s. What is the required flow rate from the single pump that supplies all of these nozzles? If there is one suction line leading to the pump, what is the minimum diameter to limit the velocity at the inlet of the pump to 2.5 m/s?

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