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Hydraulics and Fluid Mechanics in ME

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

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

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Hydraulics and Fluid Mechanics in ME
The discharge over a right angled notch is (where H = Height of liquid above the apex of notch)

(8/15) Cd. 2g. H
(8/15) Cd. 2g. H²
(8/15) Cd. 2g. H5/2
(8/15) Cd. 2g. H3/2

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Hydraulics and Fluid Mechanics in ME
For hydro-dynamically smooth boundary, the friction coefficient for turbulent flow is

constant
dependent only on Reynolds number
dependent on relative roughness only
a function of Reynolds number and relative roughness

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Hydraulics and Fluid Mechanics in ME
Euler’s dimensionless number relates the following

inertial force and gravity
viscous force and buoyancy force
pressure force and inertial force
viscous force and inertial force

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Hydraulics and Fluid Mechanics in ME
The maximum number of jets generally employed in impulse turbine without jet interference is

6
8
4
12

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Hydraulics and Fluid Mechanics in ME
The power transmitted through the pipe is maximum when the head lost due to friction is equal to

One-half of the total supply head
One-fourth of the total supply head
One-third of the total supply head
Two-third of the total supply head

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