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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The critical depth meter is used to measure

Hydraulic jump
Depth of channel
Velocity of flow in an open channel
Depth of flow in an open channel

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Hydraulics and Fluid Mechanics in ME
Rain drops are spherical because of

atmospheric pressure
viscosity
air resistance
surface tension forces

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Hydraulics and Fluid Mechanics in ME
If mercury in a barometer is replaced by water, the height of 3.75 cm of mercury will be following cm of water

52.2 cm
50 cm
52 cm
51 cm

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Hydraulics and Fluid Mechanics in ME
Discharge of a centrifugal pump is (where N = Speed of the pump impeller)

Inversely proportional to N
Inversely proportional to N²
Directly proportional to N
Directly proportional to N²

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Hydraulics and Fluid Mechanics in ME
The theoretical velocity of jet at vena contracta is (where H = Head of water at vena contracta)

2gH
2g × √H
√(2gh)
H × √(2g)

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Hydraulics and Fluid Mechanics in ME
A glass tube of small diameter (d) is dipped in fluid. The height of rise or fall in the tube given by (where w = Specific weight of liquid, α = Angle of contact of the liquid surface, and σ = Surface tension)

wd/4σ cosα
4σ cosα/wd
σ cosα/4wd
4wd/σ cosα

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