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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
If w is the specific weight of liquid and k the depth of any point from the surface, then pressure intensity at that point will be

h
w/h
wh
h/w

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Hydraulics and Fluid Mechanics in ME
A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. The total pressure on the wall per unit length is (where w = Specific weight of liquid, and H = Height of liquid)

wH2/3
wH
wH/2
wH2/2

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Hydraulics and Fluid Mechanics in ME
A flow is called hyper-sonic, if the Mach number is

Between 1 and 6
Unity
Less than unity
None of these

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Hydraulics and Fluid Mechanics in ME
A piece of wood having weight 5 kg floats in water with 60% of its volume under the liquid. The specific gravity of wood is

0.83
0.6
0.3
0.4

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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 at rest
It is incompressible
It has zero viscosity

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Hydraulics and Fluid Mechanics in ME
Choose the correct relationship

gravity = specific gravity x density
dynamicviscosity = kinematicviscosity x density
kinematicviscosity = dynamicviscosity x density
specific gravity = gravity x density

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