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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The force of buoyancy is always __________ the weight of the liquid displaced by the body.

None of these
More than
Less than
Equal to

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Hydraulics and Fluid Mechanics in ME
If the coefficient of discharge is 0.6, then the discharge over a right angled notch is

1.417 H5/2
0.417 H5/2
7.141 H5/2
4.171 H5/2

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Hydraulics and Fluid Mechanics in ME
For a body floating in a liquid the normal pressure exerted by the liquid acts at

bottom surface of the body
e.g. of the body
all points on the surface of the body
metacentre

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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)

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

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Hydraulics and Fluid Mechanics in ME
A model of a reservior is drained in 4 mts by opening the sluice gate. The model scale is 1: 225. How long should it take to empty the prototype ?

4 (225)1/3 minutes
4 minutes
4 x (225)3/2 minutes
4 x V225 minutes

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Hydraulics and Fluid Mechanics in ME
In order to avoid tendency of separation at throat in a Venturimeter, the ratio of the diameter at throat to the diameter of pipe should be

1/3 to 1/2
1/16 to 1/8
1/8 to 1/4
1/4 to 1/3

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