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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
For pipes, turbulent flow occurs when Reynolds number is

less than 4000
less than 2000
more than 4000
between 2000 and 4000

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Hydraulics and Fluid Mechanics in ME
The vapour pressure over the concave surface is

greater than the vapour pressure over the plane surface
equal to the vapour pressure over the plane surface
less man the vapour pressure over the plane surface
zero

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Hydraulics and Fluid Mechanics in ME
An object having 10 kg mass weighs 9.81 kg on a spring balance. The value of 'g' at this place is

9 m/sec
9.81 m/sec²
10 m/sec²
9.75 m/sec²

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Hydraulics and Fluid Mechanics in ME
According to Manning's formula, the discharge through an open channel is (where M = Manning's constant)

A2/3 × M1/3 × m × i
A1/2 × M2/3 × m × i
A × M × m1/2 × i2/3
A × M × m2/3 × i1/2

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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

wh
w/h
h/w
h

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Hydraulics and Fluid Mechanics in ME
The pressure intensity in kN/m2 (or kPa) at any point in a liquid is (where w = Specific weight of liquid, and h = Depth of liquid from the surface)

h/w
w
w/h
wh

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