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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
According to fan laws, for the fans having constant wheel diameters, the power demand varies

Square of fan speed
Square root of fan speed
Cube of fan speed
Directly as fan speed

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Hydraulics and Fluid Mechanics in ME
If the velocity is zero over half of the cross-sectional area and is uniform over the remaining half, then the momentum correction factor is

1
2
4
43924

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Hydraulics and Fluid Mechanics in ME
A hemispherical tank of radius (R) has an orifice of cross-sectional area (a) at its bottom and is full of liquid. The time required to empty the tank completely is

14π R5/2/15Cd × a √(2g)
14π R1/2/15Cd × a √(2g)
14π R7/2/15Cd × a √(2g)
14π R3/2/15Cd × a √(2g)

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Hydraulics and Fluid Mechanics in ME
The force per unit length is the unit of

Viscosity
Capillarity
Surface tension
Compressibility

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Hydraulics and Fluid Mechanics in ME
A flow whose streamline is represented by a curve, is called

Two-dimensional flow
One-dimensional flow
Three-dimensional flow
Four-dimensional flow

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

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

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