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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
When the water level on the downstream side of a weir is above the top surface of a weir, the weir is known as

Submerged weir
Broad-crested weir
Ogee weir
Narrow-crested weir

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Hydraulics and Fluid Mechanics in ME
The force exerted by a jet of water (in a direction normal to flow) impinging on a fixed plate inclined at an angle θ with the jet is

(waV/g) × sin θ
(waV/2g) × sin θ
(waV²/g) × sin θ
(waV²/2g) × sin 2θ

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Hydraulics and Fluid Mechanics in ME
The length of the divergent cone in a Venturimeter is __________ that of the convergent cone.

Five to six times
Double
Equal to
Three to four times

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Hydraulics and Fluid Mechanics in ME
Specific weight of water in S.I. units is equal to

9.81 xlO6 N/m3
9.81 xlO3 N/m3
1000 N/m3
10000 N/m3

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Hydraulics and Fluid Mechanics in ME
The coefficient of discharge for an external mouthpiece depends upon

Pressure of liquid
Area of mouthpiece
Velocity of liquid
Length of mouthpiece

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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 rectangular notch is given by

dQ/Q = (1/2) × (dH/H)
dQ/Q = (dH/H)
dQ/Q = (3/2) × (dH/H)
dQ/Q = (3/4) × (dH/H)

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