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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The coefficient of discharge for an external mouthpiece depends upon

Area of mouthpiece
Velocity of liquid
Pressure of liquid
Length of mouthpiece

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Hydraulics and Fluid Mechanics in ME
The velocity distribution for laminar flow through a circular tube

varies parabolically with maximum at the centre
None of these
varies linearly from zero at walls to maximum at centre
is constant over the cross-section

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Hydraulics and Fluid Mechanics in ME
When the velocity distribution is uniform over the cross-section, the correction factor for momentum is

1
2
43924

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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)

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

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Hydraulics and Fluid Mechanics in ME
An open tank containing liquid is made to move from rest with a uniform acceleration. The angle 0 which the free surface of liquid makes with the horizontal is such that (where a = Horizontal acceleration of the tank, and g = Acceleration due to gravity)

tanθ = a/2g
tanθ = a2/2g
tanθ = a/g
tanθ = 2 a/g

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Hydraulics and Fluid Mechanics in ME
Rotameter is a device used to measure

velocity of fluid
flow
absolute pressure
rotation

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