Q.2. A catrifugal pump is operating at the rotation rate of 750 rpm. Water leaves the blade at 40° from the radial direction. Water enters to blade at 80° from tangential direction( off design condition). The inner and outher radius of the impeller is 12 cm and 18 cm respectivelly. The width of the impeller is 14 cm. Flow rate of the pump is 0.60 m³/s. a) Draw the velocity triangles at inlet and outlet of the blade. Determine; b) the blade angles, B1 and B2. c)Net head and power of the pump, d) Specific speed of the pump, choose the type of the pump ( radial-mixing and axial flow types) 1

20. A centrifugal pump has an impeller 45 cms in diameter running at 450 rpm. - The discharge at inlet is entirely radial. The velocity of flow at outlet is 12. m/sec. The vanes are curved back- wards at outlet at 30° to the wheel tangent. If the discharge of the is 0'15 cumec calculate the impeller horse power and the (18'42 hp ; 29 31 kgm) pump torque on the shaft.

Please solve question four

Please solve question three

1- A double jet of Pelton turbine driven by double nozzles to produce (4250 kw) to the shaft of an electrical generator when running at (400 rpm). The height of (180 m). wheel diameter is (1450 mm). The velocity of relative= 0.9 of jet velocity. If the angle of bucket is (165'), determine: a) Hydraulic efficiency b) Diameter of the jet

i) Draw the velocity triangles at the inlet and outlet sections of a centrifugal pump whose impeller curvature is in the clockwise direction and the impeller is rotating in the counterclockwise direction. Assume no swirl flow at the inlet. ii) Figure 2 shows a typical cross-section of a working Francis turbine. The turbine consists of four main parts namely stationary/stay vanes, wicket/adjustable vanes, rotary vanes (impeller), and draft tube. Discuss the purpose and advantages of each component.

1 The internal and external diameters of the impeller of a centrifugal pump are 200 mm and 400 mm respectively. The pump is running at 1200 rpm. Forward blades make an angle of 150o at exit and at inlet the angle is 20o. The blade thicknesses at the inlet and outlet are 100mm and 70mm respectively. The hydraulic efficiency of the pump is 87%. Assume the water enters the impeller radially. i Draw neatly the outlet velocity diagram and the inlet velocity diagram. ii Find the Euler power of the pump.  iii Find the net Head of the pump. Ans:  (ii)140.65W; (iii) 43.42m

A pump has a specific speed of 45 and 600rpm when it delivers 0.01m3/s. Find the head developed by the pump in ft. Ans. 926.07

Question 4 The radial component of velocity of water leaving a centrifugal pump is 15 m/s. The magnitude of the absolute velocity of water at the pump exit is 30 m/s. Water enters the pump rotor radially. The pump has inner impeller radius of 0.05 m and outer impeller radius of 0.2 m. The impeller rotates at 2000 rpm. (a) (b) (c) Sketch the velocity triangle diagrams at the inlet and the exit of the centrifugal pump. Label each velocity vector clearly. Define U as absolute velocity of blade, V as absolute velocity of water, W as relative velocity of water. Determine the absolute velocity of blade at the inlet and the exit of the centrifugal pump. Determine the tangential component of velocity at the inlet and the exit of the centrifugal pump.

For numbers 33 to 35, A pump with an impeller diameter of 0.02 m, a speed of 58.3 rpm, a total capacity of 12 L-s, an available head of 70 m and a brakepower of 12 kW. Determine the following for a homologous pump whose impeller diameter is twice larger and operating at half the speed. 33. Capacity in L-s¯¹ a. 36 34. Head in m a. 35 b. 48 b. 70 35. Brakepower in kW a. 6 b. 24 36. Which of the following is not an obstruction meter? a. venture meter b. orifice meter c. 60 c. 105 c. 48 d. 72 d. 140 d. 72 c. pitot tube d. rotameter 37. Type of pressure tap in orifice meters where static holes are located one pipe diameter and ½ pipe diameter downstream from the plate a. corner taps b. radius taps c. pipe taps d. vena contracta taps