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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

At the top
At the canter
From sides
At the bottom

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Hydraulics and Fluid Mechanics in ME
The hydraulic grade line is

always above the centre line of pipe
All of these
never above the energy grade line
always sloping downward in the direction of flow

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Hydraulics and Fluid Mechanics in ME
The cavitation in reaction turbines is avoided, to a great extent by

Providing highly polished blades to the runner
Installing the turbine below the tail race level
All of these
Using stainless steel runner of the turbine

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Hydraulics and Fluid Mechanics in ME
The product of mass and acceleration of flowing liquid is called

Inertia force
Pressure force
Viscous force
Gravity force

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Hydraulics and Fluid Mechanics in ME
An internal mouthpiece is said to be running free if the length of the mouthpiece is __________ the diameter of the orifice.

More than three times
Less than three times
More than twice
Less than twice

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Hydraulics and Fluid Mechanics in ME
The loss of head at entrance in a pipe is (where v = Velocity of liquid in the pipe)

0.75v²/2g
0.375v²/2g
0.5v²/2g
v²/2g

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