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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The Francis formula for the discharge over Cipoletti weir is

1.84 LH5/2
1.84 LH1/2
1.84 LH3/2
1.84 LH

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Hydraulics and Fluid Mechanics in ME
If V1 and V2 are the velocities of water at inlet and outlet of the draft tube respectively, then the efficiency of a draft tube is

(V­1² - V2²) / V1²
V1 / (V1 - V2)
V1² / (V1² - V2²)
(V­1 - V2) / V1

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Hydraulics and Fluid Mechanics in ME
The error in discharge (dQ/Q) to the error in measurement of head (dH/H) over a triangular notch is given by

dQ/Q = 3/2 × (dH/H)
dQ/Q = 3 × (dH/H)
dQ/Q = 2 × (dH/H)
dQ/Q = 5/2 × (dH/H)

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Hydraulics and Fluid Mechanics in ME
Bulk modulus of a fluid is the ratio of

Increase in volume to the viscosity of fluid
Critical velocity to the viscosity of fluid
Increase in pressure to the volumetric strain
Shear stress to shear strain

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Hydraulics and Fluid Mechanics in ME
The rise or depression of liquid in a tube due to surface tension will increase in size of tube will

May increase or decrease depending on the characteristics of liquid
Increase
Remain unaffected
Decrease

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Hydraulics and Fluid Mechanics in ME
Saving of work done and power by fitting an air vessel to single acting reciprocating pump is of the order of

49.2%
39.2%
68.8%
84.8%

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