A centrifugal pump having extemal and intemal diamcters as 750 mm and 400 mm respectively is opcrating at 1000 r.p.m. The vanes are curved hack at 35° to the tangent at outlet. If the velocity of flow is constant at 6 m/s, find (a) vane angle at inlet, and (b) work done per kN of water.

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

Suppose that the pump of Fig.  is run at 1100 r/minagainst a pressure rise of 210 bar. (a) Using the measureddisplacement, estimate the theoretical delivery in gal/min.From the chart, estimate (b) the actual delivery and (c) theoverall efficiency.