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Hydraulics and Fluid Mechanics in ME

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

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

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Hydraulics and Fluid Mechanics in ME
The boundary layer thickness at a distance of l m from the leading edge of a flat plate, kept at zero angle of incidence to the flow direction, is O.l cm. The velocity outside the boundary layer is 25 ml sec. The boundary layer thickness at a distance of 4 m is (Assume that boundary layer is entirely laminar)

0.20 cm
0.05 cm
0.10 cm
0.40 cm

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Hydraulics and Fluid Mechanics in ME
Which of the following velocity potentials satisfies continuity equation ?

x2 + y2
x2-y2
x2y
cosx

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Hydraulics and Fluid Mechanics in ME
In the case of steady flow of a fluid, the acceleration of any fluid particle is

constant
variable
zero under limiting conditions
zero

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Hydraulics and Fluid Mechanics in ME
The diameter of the nozzle (d) for maximum transmission of power is given by (where D = Diameter of pipe, f = Darcy’s coefficient of friction for pipe, and l = Length of pipe)

d = (D⁵/8fl)1/5
d = (D⁵/8fl)1/2
d = (D⁵/8fl)1/4
d = (D⁵/8fl)1/3

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Hydraulics and Fluid Mechanics in ME
The flow in which the velocity vector is identical in magnitude and direction at every point, for any given instant, is known as

turbulent flow
steady flow
uniform f^w
one dimensional flow

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