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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
When a cylindrical vessel of radius (r) containing liquid is revolved about its vertical axis ω rad/s, then depth of parabola which the liquid assumes is

ω².r²/4g
ω.r/2g
ω².r²/2g
ω.r/4g

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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 triangular notch is given by

dQ/Q = 3/2 × (dH/H)
dQ/Q = 5/2 × (dH/H)
dQ/Q = 3 × (dH/H)
dQ/Q = 2 × (dH/H)

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

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

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Hydraulics and Fluid Mechanics in ME
The velocity at which the flow changes from laminar flow to turbulent flow is called

Sub-sonic velocity
Super-sonic velocity
Critical velocity
Velocity of approach

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Hydraulics and Fluid Mechanics in ME
A Pelton wheel develops 1750 kW under a head of 100 meters while running at 200 r.p.m. and discharging 2500 liters of water per second. The unit discharge of wheel is

0.25 m3/s
2.5 m3/s
1.5 m3/s
0.5 m3/s

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Hydraulics and Fluid Mechanics in ME
An odd shaped body weighing 7.5 kg and occupying 0.01 m3 volume will be completely submerged in a fluid having specific gravity of

1.2
0.75
1
0.8

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