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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The ratio of the inertia force to the viscous force is called

Euler's number
Weber's number
Reynold's number
Froude's number

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Hydraulics and Fluid Mechanics in ME
The most economical section of a trapezoidal channel is one which has hydraulic mean depth equal to

1/2 × breadth
1/2 × sloping side
1/2 × depth
1/4 × (depth + breadth)

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Hydraulics and Fluid Mechanics in ME
The total energy of each particle at various places in the case of perfect incompressible fluid flowing in continuous stream

Remain constant
Keeps on increasing
May increase/decrease
Keeps on decreasing

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Hydraulics and Fluid Mechanics in ME
The flow in which the velocity vector is identical in magnitude and direction at every point, for any given instant, is known as

uniform f^w
turbulent flow
steady flow
one dimensional flow

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Hydraulics and Fluid Mechanics in ME
The pressure of fluid due to hammer blow is

Inversely proportional to (density)1/2 of fluid
Inversely proportional to density of fluid
Directly proportional to (density)1/2 of fluid
Directly proportional to density of fluid

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Hydraulics and Fluid Mechanics in ME
According to Chezy's formula, the discharge through an open channel is (where A = Area of flow, C = Chezy's constant, m = Hydraulic mean depth, and i = Uniform slope in bed)

AC × √(m × i)
A × √(m × i)
mi × √(A × C)
C × √(m × i)

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