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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
If the velocity is zero over half of the cross-sectional area and is uniform over the remaining half, then the momentum correction factor is

4
2
43924
1

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Hydraulics and Fluid Mechanics in ME
According to Francis formula, the discharge over a rectangular weir is (where n = Number of end contractions)

(2/3) × Cd (L - nH) × √(2g) × H5/2
(2/3) × Cd (L - nH) × √(2gh)
(2/3) × Cd (L - nH) × √(2g) × H²
(2/3) × Cd (L - 0.1nH) × √(2g) × H3/2

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Hydraulics and Fluid Mechanics in ME
According to equation of continuity,

a1v1 = a2v2
w1v1 = w2v2
a1/v1 = a2/v2
w1a1 = w2a2

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Hydraulics and Fluid Mechanics in ME
The width of the bucket for a Pelton wheel is generally ________ the diameter of jet.

Three times
Five times
Double
Four times

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Hydraulics and Fluid Mechanics in ME
The coefficient of viscosity may be determined by

All of these
Capillary tube method
Orifice type viscometer
Rotating cylinder method

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Hydraulics and Fluid Mechanics in ME
In reaction turbine, draft tube is used

For safety of turbine
To convert the kinetic energy to flow energy by a gradual expansion of the flow cross-section
To increase flow rate
To transport water downstream without eddies

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