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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Which of the following is an example of laminar flow?

Flow past tiny bodies
Underground flow
Flow of oil in measuring instruments
All of these

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Hydraulics and Fluid Mechanics in ME
A vertically immersed surface is shown in the below figure. The distance of its centre of pressure from the water surface is

(d²/12 x̅) + x̅
(bd²/12) + x̅
b²/12 + x̅
d²/12 + x̅

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Hydraulics and Fluid Mechanics in ME
The rise or depression of liquid in a tube due to surface tension will increase in size of tube will

May increase or decrease depending on the characteristics of liquid
Remain unaffected
Increase
Decrease

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

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Hydraulics and Fluid Mechanics in ME
A differential manometer is used to measure

Difference of pressures between two points in a pipe
Pressure in Venturimeter
Atmospheric pressure
Pressure in pipes and channels

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Hydraulics and Fluid Mechanics in ME
Euler's equation in the differential form for the motion of liquids is given by

ρ.dp + g.dz + v.dv = 0
ρ.dp - g.dz + v.dv = 0
dp/ρ + g.dz + v.dv = 0
dp/ρ - g.dz + v.dv = 0

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