Hydraulics and Fluid Mechanics in ME
A hemispherical tank of radius (R) has an orifice of cross-sectional area (a) at its bottom and is full of liquid. The time required to empty the tank completely is

14π R7/2/15Cd × a √(2g)
14π R3/2/15Cd × a √(2g)
14π R5/2/15Cd × a √(2g)
14π R1/2/15Cd × a √(2g)

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Hydraulics and Fluid Mechanics in ME
The total energy of a liquid particle in motion is equal to

Potential energy - (pressure energy + kinetic energy
Pressure energy + kinetic energy + potential energy
Pressure energy - (kinetic energy + potential energy)
Kinetic energy - (pressure energy + potential energy)

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Hydraulics and Fluid Mechanics in ME
In an outward flow reaction turbine

The flow of water is partly radial and partly axial
The water flows parallel to the axis of the wheel
The water enters the wheel at the outer periphery and then flows towards the centre of the wheel
The water enters at the centre of the wheel and then flows towards the outer periphery of the wheel

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