Hydraulics and Fluid Mechanics in ME
Head developed by a centrifugal pump is

Proportional to diameter of impeller
Proportional to diameter and speed of impeller
None of these
Proportional to speed of impeller

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Hydraulics and Fluid Mechanics in ME
When a liquid is flowing through a pipe, the velocity of the liquid is

Maximum at the centre and minimum near the walls
Maximum at the centre and zero near the walls
Minimum at the centre and maximum near the walls
Zero at the centre and maximum near the walls

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