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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
In a centrifugal pump, the liquid enters the pump

From sides
At the bottom
At the canter
At the top

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Hydraulics and Fluid Mechanics in ME
The motion of air mass in a tornado is a

forced vortex at center and free vortex outside
free vortex motion
forced vortex motion
free vortex at center and forced vortex outside

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Hydraulics and Fluid Mechanics in ME
If a pump is handling water and is discharging a certain flow Q at a constant total dynamic head requiring a definite B.H.P., the same pump when handling a liquid of specific gravity 0.75 and viscosity nearly same as of water , the horse power required will be

Same
H.P./0.75
1.5 B.H.P
0.75 B.H.P

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Hydraulics and Fluid Mechanics in ME
The angle of taper on draft tube is

Greater than 5°
Greater than 8°
Greater than 15°
Less than 8°

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Hydraulics and Fluid Mechanics in ME
In centrifugal pumps, maximum efficiency is obtained when the blades are

Straight
Bent backward
Radial
Bent forward

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Hydraulics and Fluid Mechanics in ME
In reaction turbine, draft tube is used

For safety of turbine
To transport water downstream without eddies
To convert the kinetic energy to flow energy by a gradual expansion of the flow cross-section
To increase flow rate

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