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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The discharge through a siphon spillway is

Cd × a × √(2g) × H2
Cd × a × √(2g) × H5/2
Cd × a × √(2gH)
Cd × a × √(2g) × H3/2

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Hydraulics and Fluid Mechanics in ME
For hydro-dynamically smooth boundary, the friction coefficient for turbulent flow is

a function of Reynolds number and relative roughness
dependent on relative roughness only
dependent only on Reynolds number
constant

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Hydraulics and Fluid Mechanics in ME
According to fan laws, for the fans having constant wheel diameters, the power demand varies

Square root of fan speed
Square of fan speed
Cube of fan speed
Directly as fan speed

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Hydraulics and Fluid Mechanics in ME
The point at which the resultant pressure on an immersed surface acts, is known as

Centre of immersed surface
Centre of pressure
Centre of gravity
Centre of depth

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

length
mass
energy
work

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Hydraulics and Fluid Mechanics in ME
When a cylindrical vessel, containing some liquid, is rotated about its vertical axis, the liquid surface is depressed down at the axis of its rotation and rises up near the walls of the vessel on all sides. This type of flow is known as

Uniform flow
Steady flow
Turbulent flow
Vortex flow

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