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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

2
4
43924
1

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Hydraulics and Fluid Mechanics in ME
Principle of similitude forms the basis of

comparing two identical equipments
hydraulic designs
comparing similarity between design and actual equipment
designing models so that the result can be converted to prototypes

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Hydraulics and Fluid Mechanics in ME
Gauge pressure at a point is equal to the absolute pressure ___ the atmospheric pressure.

Divide
Multiply
Plus
Minus

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Hydraulics and Fluid Mechanics in ME
The bulk modulus of elasticity

increases with pressure
has the dimensions of 1/pressure
is independent of pressure and viscosity
is large when fluid is more compressible

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Hydraulics and Fluid Mechanics in ME
The discharge over the trapezoidal notch is equal to the discharge over the rectangular notch __________ the discharge over the triangular notch.

Divide
None of these
Plus
Minus

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Hydraulics and Fluid Mechanics in ME
The discharge over a rectangular notch is (where b = Width of notch, and H = Height of liquid, above the sill of the notch)

(2/3) Cd × b × √(2g) × H2
(2/3) Cd × b × √(2g) × H
(2/3) Cd × b × √(2g) × H3/2
(2/3) Cd × b × √(2gH)

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