PROBLEM 1 In an axial flow pump, the rotor has an outer diameter of 75 cm and an inner diameter of 40 cm, it rotates at 500 rpm. At the mean blade radius, the inlet blade angle is 12 deg and the outlet blade angle is 15 deg Sketch the corresponding velocity diagrams at inlet and outlet and estimate the following: ) the head the pump will generate, B 17 6m C5.4m D 19.8 m A. 11.2 m (ii) the discharge or rate of flow in l/s A 705 Vs B. 203 /s C407 Us D 609 Vs (iii) the shaft h.p input required to drive the pump and B 230 hp C:300 hp D 401 hp A 170 hp (N) the specific speed of the pump. B 65 C.45 D.75 A 80

PROBLEM 1 In an axial flow pump, the rotor has an outer diameter of 75 cm and an inner diameter of 40 cm, it rotates at 500 rpm. At the mean blade radius, the inlet blade angle is 12 deg and the outlet blade angle is 15 deg Sketch the corresponding velocity diagrams at inlet and outlet and estimate the following: ) the head the pump will generate, B 17 6m C5.4m D 19.8 m A. 11.2 m (ii) the discharge or rate of flow in l/s A 705 Vs B. 203 /s C407 Us D 609 Vs (iii) the shaft h.p input required to drive the pump and B 230 hp C:300 hp D 401 hp A 170 hp (N) the specific speed of the pump. B 65 C.45 D.75 A 80

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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B-A pump has the following parameters N=2133.5 RPM, Ns = 40 RPM, D= 37.1 cm and is used to pump water up to 90 m(H) at maximum efficiency operation: write the answer only (a) At what speed should the pump be operated to pump water up to (76 m)? (b) What is the discharge in each case? (c) What is pumping power needed in each case? (d) What is consumed electrical power in each case if max = 90%? e- A pump discharges liquid at the rate of Q against a head of H. If specific weight of the liquid is w, find the expression for the pumping power.
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