Hydraulics and Fluid Mechanics in ME
Working principle of dead weight pressure gauge tester is based on

Newton’s law of viscosity
Avogadro’s hypothesis
Dalton’s law of partial pressure
Pascal’s law

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

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

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