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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Hydrometer is used to determine

relative humidity
specific gravity of liquids
specific gravity of gases
specific gravity of solids

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Hydraulics and Fluid Mechanics in ME
Discharge (Q) of a centrifugal pump is given by (where D = Diameter of impeller at inlet, b = Width of impeller at inlet, and Vf = Velocity of flow at inlet)

Q = D.b.Vf
Q = π.b.Vf
Q = π.D.Vf
Q = π.D.bf.V

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Hydraulics and Fluid Mechanics in ME
The total energy of each particle at various places in the case of perfect incompressible fluid flowing in continuous stream

Keeps on increasing
Keeps on decreasing
May increase/decrease
Remain constant

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Hydraulics and Fluid Mechanics in ME
In a broad-crested weir, the discharge is maximum if the head of water on the downstream side of weir is __________ the head of water on the upstream side of weir.

Three-fourth
Two-third
Equal to
One-third

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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)

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

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Hydraulics and Fluid Mechanics in ME
The depth of center of pressure of an immersed surface, inclined at an angle 'θ' with the liquid surface lies at a distance equal to __________ the center of gravity.

IG sin²θ/Ax̅ above
IG sin²θ/Ax̅ below
IG sinθ/Ax̅ above
IG sinθ/Ax̅ below

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