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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

wh
w/h
h/w
h

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Hydraulics and Fluid Mechanics in ME
If the surface of liquid is convex, men

Cohesion pressure is decreased
There is no cohesion pressure
Cohesion pressure is negligible
Cohesion pressure is increased

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Hydraulics and Fluid Mechanics in ME
An air vessel is provided at the summit in a siphon to

Increase discharge
Maintain pressure difference
Avoid interruption in the flow
Increase velocity

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Hydraulics and Fluid Mechanics in ME
Impulse turbine is generally fitted

Slightly below the tail race
At the level of tail race
About 2.5 m above the tail race to avoid cavitations
Little above the tail race

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Hydraulics and Fluid Mechanics in ME
In axial flow fans and turbines, fluid enters and leaves as follows

Radially, axially
Axially, radially
Axially, axially
Radially, radially

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Hydraulics and Fluid Mechanics in ME
When the velocity distribution is uniform over the cross-section, the correction factor for momentum is

43924
2
1

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