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Q9. A centrifugal bilge pump impeller is 250 mm outside diameter and 200 mm inside diameter and runs at 430 rpm.

The radial velocity at the inlet and the outlet is 8.2 m/s.

The tangential component is 2.1 m/s, and the volumetric flow rate throughout 1s 400 m³/hr

Calculate EACH of the following:

(a) the blade outlet angle

(b) the blade inlet angle

(c) the width of the impeller at the inlet and outlet

(d) the power.

Note: The density of dirty water is 1015kg/m³