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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Metacentric height is the distance between the metacentre and

water surface
center of pressure
center of buoyancy
center of gravity

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Hydraulics and Fluid Mechanics in ME
The specific speed of a turbine is given by the equation

N√P / H3/2
N√P / H5/4
N√P / H²
N√P / H3

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Hydraulics and Fluid Mechanics in ME
The bulk modulus of elasticity

increases with pressure
is independent of pressure and viscosity
has the dimensions of 1/pressure
is large when fluid is more compressible

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Hydraulics and Fluid Mechanics in ME
All the terms of energy in Bernoulli’s equation have dimension of

length
work
mass
energy

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Hydraulics and Fluid Mechanics in ME
In a Kaplan turbine runner, the numbers of blades are generally between

16 to 24
4 to 8
8 to 16
2 to 4

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Hydraulics and Fluid Mechanics in ME
At the center line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be

Zero
Minimum
Could be any value
Maximum

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