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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Reaction turbines are used for

Low head and high discharge
Low head
High head
High head and low discharge

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Hydraulics and Fluid Mechanics in ME
A body floating in a liquid is said to be in neutral equilibrium, if its metacentre

Lies above its centre of gravity
Coincides with its centre of gravity
Lies between the centre of buoyancy and centre of gravity
Lies below its centre of gravity

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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.

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

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Hydraulics and Fluid Mechanics in ME
An average value of coefficient of velocity is

0.62
0.84
0.97
0.76

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Hydraulics and Fluid Mechanics in ME
For pipes, laminar flow occurs when Roynolds number is

less than 2000
more than 4000
between 2000 and 4000
less than 4000

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Hydraulics and Fluid Mechanics in ME
Metacentric height for small values of angle of heel is the distance between the

free surface and centre of buoyancy
centre of gravity and metacentre
centre of gravity and centre of buoy-ancy
centre of buoyancy and metacentre

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