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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
When the water level on the downstream side of a weir is above the top surface of a weir, the weir is known as

Broad-crested weir
Narrow-crested weir
Ogee weir
Submerged weir

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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

0.3
0.6
0.83
0.4

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Hydraulics and Fluid Mechanics in ME
The discharge over a rectangular notch is (where b = Width of notch, and H = Height of liquid, above the sill of the notch)

(2/3) Cd × b × √(2g) × H2
(2/3) Cd × b × √(2gH)
(2/3) Cd × b × √(2g) × H3/2
(2/3) Cd × b × √(2g) × H

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Hydraulics and Fluid Mechanics in ME
The flow in a pipe is turbulent when Reynold number is

None of these
Less than 2000
Between 2000 and 2800
More than 2800

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Hydraulics and Fluid Mechanics in ME
In series-pipe problems

the discharge through each pipe is added to obtain total discharge
a trial solution is not necessary
the head loss is same through each pipe
the discharge is same through each pipe

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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

w/h
h/w
h
wh

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