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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
For pipes, turbulent flow occurs when Reynolds number is

more than 4000
less than 2000
between 2000 and 4000
less than 4000

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Hydraulics and Fluid Mechanics in ME
The pitot tube is used to measure

dynamic pressure
velocity at stagnation point
static pressure
stagnation pressure

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Hydraulics and Fluid Mechanics in ME
The total pressure on the top of a closed cylindrical vessel of radius (r) completely filled up with liquid of specific weight (w) and rotating at (ω) rad/s about its vertical axis, is

π w ω² r²/2g
π w ω² r²/4g
π w ω² r⁴/4g
π w ω² r³/4g

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Hydraulics and Fluid Mechanics in ME
The loss of head at exit of a pipe is (where v = Velocity of liquid in the pipe)

0.75v²/2g
0.5v²/2g
0.375v²/2g
v²/2g

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Hydraulics and Fluid Mechanics in ME
In impulse Turbine, energy available at the inlet is in the form of

Strain Energy
Potential Energy
None of these
Kinetic energy

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Hydraulics and Fluid Mechanics in ME
Which of the following instruments is used to measure flow on the application of Bernoulli’s theorem

pitot tube
All of these
Orifice plate
Venturimeter

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