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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
If a body floating in a liquid occupies a new position and remains at rest in this new position, when given a small angular displacement, the body is said to be in __________ equilibrium.

Unstable
Neutral
Stable
None of these

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Hydraulics and Fluid Mechanics in ME
The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at the Centroid, if

The area is vertical
The area is horizontal
All of these
The area is inclined

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Hydraulics and Fluid Mechanics in ME
The discharge through a small rectangular orifice is given by (where Cd = Coefficient of discharge for the orifice, a = Cross-sectional area of the orifice, h = Height of the liquid above the centre of the orifice)

Q = (3Cd × a)/√(2h)
Q = Cd × a × 2gh
Q = (Cd × a)/√(2gh)
Q = (2/3). Cd × a × h

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Hydraulics and Fluid Mechanics in ME
A flow is called hyper-sonic, if the Mach number is

Unity
Between 1 and 6
None of these
Less than unity

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Hydraulics and Fluid Mechanics in ME
The centre of gravity of the volume of the liquid displaced is called

Centre of pressure
Metacentre
None of the listed here
Centre of buoyancy

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Hydraulics and Fluid Mechanics in ME
The speed of a turbine runner is

Inversely proportional to H1/2
Inversely proportional to H3/2
Directly proportional to H1/2
Directly proportional to H3/2

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