Hydraulics and Fluid Mechanics in ME
A glass tube of small diameter (d) is dipped in fluid. The height of rise or fall in the tube given by (where w = Specific weight of liquid, α = Angle of contact of the liquid surface, and σ = Surface tension)

wd/4σ cosα
4wd/σ cosα
4σ cosα/wd
σ cosα/4wd

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Hydraulics and Fluid Mechanics in ME
Discharge of a centrifugal pump is

Directly proportional to diameter of its impeller
Inversely proportional to (diameter)² of its impeller
Inversely proportional to diameter of its impeller
Directly proportional to (diameter)² of its impeller

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