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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The loss of pressure head in case of laminar flow is proportional to

(Velocity)3
Velocity
(Velocity)4
(Velocity)2

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Hydraulics and Fluid Mechanics in ME
Kinematic similarity is said to exist between the model and the prototype, if both of them

Are identical in shape, but differ only in size
Have identical velocities
Are equal in size and shape
Have identical forces

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Hydraulics and Fluid Mechanics in ME
The depth ‘d’ below the free surface at which the point velocity is equal to the average velocity of flow for a uniform laminar flow with a free surface, will be (where D is the depth of flow)

0.707 D
0.423 D
0.223 D
0.577 D

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Hydraulics and Fluid Mechanics in ME
An opening in the side of a tank or vessel such that the liquid surface with the tank is below the top edge of the opening, is called

Orifice
None of these
Weir
Notch

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Hydraulics and Fluid Mechanics in ME
The bulk modulus of elasticity

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

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Hydraulics and Fluid Mechanics in ME
According to Chezy's formula, the discharge through an open channel is (where A = Area of flow, C = Chezy's constant, m = Hydraulic mean depth, and i = Uniform slope in bed)

A × √(m × i)
AC × √(m × i)
C × √(m × i)
mi × √(A × C)

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