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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
When the velocity distribution is uniform over the cross-section, the correction factor for momentum is

1
2
43924

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Hydraulics and Fluid Mechanics in ME
The loss of head at exit of a pipe is (where v = Velocity of liquid in the pipe)

0.75v²/2g
0.375v²/2g
0.5v²/2g
v²/2g

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Hydraulics and Fluid Mechanics in ME
The hydraulic mean depth or the hydraulic radius is the ratio of

Wetted perimeter and diameter of pipe
Area of flow and wetted perimeter
Velocity of flow and area of flow
None of these

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Hydraulics and Fluid Mechanics in ME
If a body floating in a liquid returns back to its original position, when given a small angular displacement, the body is said to be in

Unstable equilibrium
Neutral equilibrium
Stable equilibrium
None of these

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Hydraulics and Fluid Mechanics in ME
For laminar flow in circular pipes, the Darcy’s friction factor f is equal to

16/Re
64/ Re
32/ Re
None of these

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Hydraulics and Fluid Mechanics in ME
The maximum hydraulic efficiency of an impulse turbine is (where φ = Angle of blade tip at outlet)

(1 + cos φ)/2
(1 - cos φ)/2
(1 - sin φ)/2
(1 + sin φ)/2

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