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

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

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Hydraulics and Fluid Mechanics in ME
The discharge through a channel of trapezoidal section is maximum when

Depth of channel is equal to the width at the bottom
The sloping side is equal to half the width at the top
The sloping side is equal to the width at the bottom
Width of channel at the top is equal to twice the width at the bottom

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