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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The value of coefficient of velocity for a sharp edged orifice __________ with the head of water.

Increases
None of these
Remain same
Decreases

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Hydraulics and Fluid Mechanics in ME
Gradually varied flow is

steady uniform
non-steady uniform
steady non-uniform
non-steady non-uniform

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Hydraulics and Fluid Mechanics in ME
The pressure in the air space above an oil (sp. gr. 0.8) surface in a tank is 0.1 kg/cm". The pressure at 2.5 m below the oil surface will be

3 metres of water column
2 metres of water column
3.5 metres of water column
4 m of water column

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Hydraulics and Fluid Mechanics in ME
According to Darcy's formula, the loss of head due to friction in the pipe is (where f = Darcy's coefficient, l = Length of pipe, v = Velocity of liquid in pipe, and d = Diameter of pipe)

flv²/gd
flv²/2gd
4flv²/2gd
3flv²/2gd

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Hydraulics and Fluid Mechanics in ME
A Piezometer tube is used only for measuring

High pressure
Low pressure
Vacuum pressure
Moderate pressure

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Hydraulics and Fluid Mechanics in ME
The normal stress in a fluid will be constant in all directions at a point only if

It has uniform viscosity
It is incompressible
It is at rest
It has zero viscosity

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