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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The value of bulk modulus of a fluid is required to determine

Froude's number
Euler's number
Reynold's number
Mach number

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Hydraulics and Fluid Mechanics in ME
Two pipes of same length and diameters d and 2d respectively are connected in series. The diameter of an equivalent pipe of same length is

between 1.5 d and 2d
between d and 1.5 d
less than d
greater than 2d

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Hydraulics and Fluid Mechanics in ME
Which of the following statement is correct as regard to water wheels?

All of these
They have slow speeds
They are suitable even for low water heads
They give constant efficiency, even if the discharge is not constant

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Hydraulics and Fluid Mechanics in ME
The angle of contact in case of a liquid depends upon

both of die above
the material which exists above the free surface of the liquid
the nature of the liquid and the solid
any one of the above

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Hydraulics and Fluid Mechanics in ME
Discharge (Q) of a centrifugal pump is given by (where D = Diameter of impeller at inlet, b = Width of impeller at inlet, and Vf = Velocity of flow at inlet)

Q = π.b.Vf
Q = D.b.Vf
Q = π.D.Vf
Q = π.D.bf.V

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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

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

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