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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The total energy line lies over the centre line of the pipe by an amount equal to

Pressure head + velocity head
Pressure head - velocity head
Velocity head
Pressure head

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Hydraulics and Fluid Mechanics in ME
The depth of the center of pressure on a vertical rectangular gate 8 m wide and 6 m high, when the water surface coincides with the top of the gate, is

3.0 m
2.5 m
2.4 m
4.0 m

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Hydraulics and Fluid Mechanics in ME
Rotameter is a device used to measure

absolute pressure
rotation
velocity of fluid
flow

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

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Hydraulics and Fluid Mechanics in ME
The property by virtue of which a liquid opposes relative motion between its different layers is called

Osmosis
Viscosity
Surface tension
Coefficient of viscosity

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Hydraulics and Fluid Mechanics in ME
The specific speed of a turbine is the speed of an imaginary turbine, identical with the given turbine, which

Develops unit power under unit head
Delivers unit discharge under unit speed
Delivers unit discharge under unit head
Develops unit power under unit speed

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