A) A DC motor driven pump running at 100 RPM delivers 30 L/sec of water at 40C (d = 992.3 kg/m3 ) against a totalpumping head of 27 m with a pump efficiency 60%,   A.)what motor HP is required? (20 KW)answer   B) What speed and capacity would result if the pump RPM were increased to produced a pumping head of 36 m,assuming no change in efficiency. (N2 = 116 RPM)answer

Q3) A compressor, requiring 90 kW is to run at about 250 r.p.m. The drive is by V-belts from an electric motor running at 750 r.p.m. The diameter of the pulley on the compressor shaft must not be greater than 1 meter while the centre distance between the pulleys is limited to 1.75 meter. The belt speed should not exceed 1600 m/mi. Determine the number of V-belts required to transmit the power if each belt has a cross-sectional area of 375 mm² density 1000 kg/m and an allowable tensile stress of 2,5 MPa. The groove angle of the pulley is 35°. The coefficient of friction between the belt and the pulley is 0.25.

1) A single-stage centrifugal pump operating at 650 rpm and delivering 250 gallons per second has a specific speed of 4750 rpm. The suction flange is 609.6 mm in diameter and has a vacuum pressure of 70 kPa. The discharge flange is 22 inches in diameter and its centerline is 30.5 cm above the suction centerline. What discharge pressure in kPaa would you expect to find?

A hydraulic vane pump running at 1800 rpm develops 2 L/s flow at 750 kPa. Volumetric efficiency is .85 and overall efficiency is 0.8. Determine the Actual Torque Required, TÀ (N- m). (Hint: first calculate the mechanical efficiency and theoretical flow rate. Convert rpm to rad/s). O 10.6 N-m O 9.94 N-m O 8.01 N-m O 9.35 N-m O 8.85 N-m

a) A suction pump. Consider a pipe that is inserted vertically into water. By suction, the pipe is evacuated of air. How high will the water rise? b) A water turbine is designed to extract kinetic energy from the hor- izontal flow of water and convert it into rotation of the turbine. You may assume that the height of the fluid does not change as it flows through the turbine, and that the fluid is incompressible. If the velocity is lowered from 100 m/s to 70 m/s as the fluid flows through the turbine, what is the change in pressure? c) Is the pressure higher upstream or downstream? d) The fluid in (b) is replaced by air to make a wind turbine. What is the change in pressure now for the identical change in velocity to (b)?

A hydraulic vane pump running at 1800 rpm develops 2 L/s flow at 750 kPa. Volumetric efficiency is .85 and overall efficiency is 0.8. Determine the Theoretical Torque required, TT (N-m). (Hint: first calculate the mechanical efficiency and theoretical flow rate. Convert rpm to rad/s). O 9.41 N-m 8.85 N-m 9.35 N-m 9.62 N-m 8.80 N-m

4. A centrifugal pump delivers 1500 L/min of water from an initial pressure of 156 kPa to a final pressure of 328 kPa. The area of the inlet pipe is 315 cm² and the area of the discharge pipe is 80 cm?. Solve for the power input to the pump, kW.

A hydraulic motor has a displacement of 0.000064 m/rev, a system pressure of 5MPa and a speed of 1000 rpm. If the flow rate of a hydraulic motor is 0.008 m/s with a torque of 170 Nm, find the efficiency Volume 7, mechanical efficiency 7m, overall efficiency 7%, power of hydraulic motor (Power moter)

A pump has overall efficiency of 70 %. It delivers 90 Ipm at 1000 rpm and 700 N/cm". If the prime mover input torque is 12 KN-cm, calculate a) the actual torque of the pump b) volumetric displacement in cm". Comment on the significance of torque in pumps. A BI

1.1. The pump whose performance curves are shown in Figure P1.1 is operated at 1750 rpm and is connected to a 2-in. i.d. galvanized iron pipe 175 ft long. What will be the flow rate and power input? 100 90 Head curve 80 70 60 50 40 -Efficiency 30 20 10 20 40 60 80 100 120 140 160 180 Flow rate (gpm) FIGURE P1.1 Performance curves for a pump with a 9-in. impeller and speed 1750 rpm. 1.7. If the pump and pipe arrangement of Problem 1.1 now includes an elevation increase of 30 ft, what flow will result? Head rise (ft); efficiency ()