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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The most economical section of a trapezoidal channel is one which has hydraulic mean depth equal to

1/4 × (depth + breadth)
1/2 × breadth
1/2 × sloping side
1/2 × depth

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Hydraulics and Fluid Mechanics in ME
A venturi-flume is used to measure

Pressure difference between two points in a channel
Pressure difference between two points in a pipe
Discharge of liquid
Pressure of liquid

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Hydraulics and Fluid Mechanics in ME
The discharge through an external mouthpiece is given by (where a = Cross-sectional area of the mouthpiece, and H = Height of liquid above the mouthpiece)

1.585 a.√(2gH)
1.855 aH.√(2g)
5.85 aH.√(2g)
0.855 a.√(2gH)

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Hydraulics and Fluid Mechanics in ME
A notch is used to measure __________ of liquids.

Volume
Velocity
Pressure
Discharge

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Hydraulics and Fluid Mechanics in ME
A weir is said to be broad crested weir, if the width of the crest of the weir is ________ half the height of water above the weir crest.

Equal to
None of these
More than
Less than

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Hydraulics and Fluid Mechanics in ME
For 450 m head of water, _________ shall be used.

None of these
Pelton wheel
Francis turbine
Kaplan turbine

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