Which of the following options will facilitate the achievement of a very high head (say 30 metres) in case of a centrifugal pump ?

Fluid Mechanics for Chemical 14/01/2021

A. Increasing the impeller speed and the volute area
B. Increasing the number of vanes in the impeller
C. Mounting of two or more impellers in series on a single shaft
D. Either of A., B. or C.

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