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- A Pelton wheel is supplied with 6kg/s of water at 70m/s. The buckets rotate on a mean diameter of 350mm at 1200 rev/min. the deflection angle is 165º and friction negligible. a). Determine the diagram power.(5mks) b). Draw the vector diagram to scale and determine change in water velocity.(5mks)The cylinder bore diameter of a single-acting reciprocating pump is 150 mm and its stroke is 310 mm. The pump runs at 56 rpm and lifts water through a height of 28 m. The delivery pipe is 23 m long and 102 mm in diameter. Find (i) the theoretical discharge in liters/s,(ii) the theoretical power required to run the pump in kW, (iii) the percentage of slip, and (iv) the coefficient of discharge., if the actual discharge is 4.3 liters/s. Assume the weight density of water is 9810 N/m3The cylinder bore diameter of a double-acting reciprocating pump is 170 mm and its stroke is 370 mm. The pump runs at 55 rpm and lifts water through a height of 26 m. The delivery pipe is 23.5 m long and 113 mm in diameter. Find (i) the theoretical discharge in liters/s,(ii) the theoretical power required to run the pump in kW, (iii) the percentage of slip, and (iv) the coefficient of discharge., if the actual discharge is 13 liters/s. Assume the weight density of water is 9810 N/m3 (i)Theoretical discharge in liter/s (ii) the theoretical power required to run the pump in kW (iii) the percentage of slip (iv) the coefficient of discharge.
- Consider a 20°C fl ow at 2 m/s through a smooth 3-mmdiameter microtube which consists of a straight run of10 cm, a long radius bend, and another straight run of10 cm. Compute the total pressure drop if the fl uid is(a) water; and (b) ethylene glycol.A pump running at 1,440 rpm has to support a load of 10 kN. Journal diameter is 130 mm. Design a suitable Finite hydrodynamic journal bearing (L/D=1) with radial clearance of 0.065mm. The inlet oil film temperature is 45oC. Calculate the bearing characteristics and the required heat dissipation. Design , Pleas solve it quiqly thank you for your helpQ 3. The brake shown in the figure uses a band that has a coefficient of friction equivalent to rigid molded asbestos (dry) and is to operate using a maximum force F of 400 N. If the band width is 50 mm, find the band tensions and the braking torque.
- Impeller in a centrifugal pump as shown in the figure is connected to the shaft with CONICAL CLEANER. The power to be transmitted by the motor is P = 23 kW. Its revolution is n = 1822 rpm. Width of the conical joint is b=96mm, Conical angle α = 1 degree, Friction coefficient μ =0.3. The conical connection is tightened up to the limit of the surface safety pressure (Pem=39 N/mm2, the shear safety stress of the shaft τem=22 N/mm2) After finding the required SHAFT DIAMETER, HOW MUCH IS the connection safe or not in order to transmit this force. (Attention! and the ratio of the torque coming from the motor gives safety)An oil well has the following specifications; • Tubing diameter = 2.875” • Tubing roughness = 0.0254 mm • Flow rate = 600 bbl/d • Average reservoir pressure is 4230 psig and Pb is 46335 • Well Depth = 133000 ft 1- Calculate Pwf at 1000, 3000 and 4500 psi. 2- Calculate Pwf at tubing ID 3”, 4” and 5”. Plot Pwf vs Q and determine optimum production rate for both cases Fluid properties GOR 1930 scf/stb Gas Sg is 0.74 Oil API 42 WOR is 0.1 Reservoir temperature 175 F6. P, Thrust washer A sluice gate weighing 18 kN is raised and lowered by means of square threaded screws, as shown in Fig. 10.30. The frictional resistance induced by water pressure against the gate when it is in its lowest Nut position is 4000 N. The outside diameter of the screw is 60 mm and pitch Screw is 10 mm. The outside and inside diameter of washer is 150 mm and 50 mm respectively. The coefficient of friction between the screw and nut is 0.1 and for Fig. 10.30 the washer and seat is 0.12. Find : 1. The maximum force to be exerted at the ends of the lever for raising and lowering the gate, and 2. Efficiency of the arrangement. [Ans. 114 N; 50 N ; 15.4%
- A continous wood stave pipe is 3.0 m in diameter and is in service under a head of 30.0 m of water. The staves are secured by means of round 25 mm steel hoops with allowable stress of 105 MPa. Find the masimum spacing in cm of the hoops to safely secure the pipe. Assume that there is an initial tension of 7000 N applied to the hoops.A column is installed on two bearings and carries a pulley weighing 550 in the vertical direction in the middle of us in the figure. The pulley is connected to the shaft by means of a cog, and the pulley moves the transmission belt in the horizontal direction, the total tension in it is (3500), so if the received power is (15KW) at the speed (150rpm), find the diameter of the shaft required by imposing the permissible shear stress of 140MPa, and in tensile or bending it is equal to 220MPaA torsion dynamometer is fitted on a turbine shaft to measure the angle of twist. It is observed that the shaft twists 1.5° in a length of 5 metres at 500 r.p.m. The shaft is solid and has a diameter of 200 mm. If the modulus of rigidity for the shaft material is 85 GPa, find the power transmitted by the turbine.