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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The flow in a pipe is neither laminar nor turbulent when Reynold number is

More than 2800
Between 2000 and 2800
None of these
Less than 2000

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Hydraulics and Fluid Mechanics in ME
The relation between hydraulic efficiency (ηh), mechanical efficiency (ηm) and overall efficiency (ηo) is

ηh = ηo × ηm
None of these
ηo = ηh × ηm
ηm = ηm × ηh

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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
Pressure in pipes and channels
Atmospheric pressure

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Hydraulics and Fluid Mechanics in ME
At the center line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be

Maximum
Minimum
Zero
Could be any value

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Hydraulics and Fluid Mechanics in ME
The depth of the center of pressure on a vertical rectangular gate 8 m wide and 6 m high, when the water surface coincides with the top of the gate, is

4.0 m
2.4 m
3.0 m
2.5 m

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

static pressure
velocity at stagnation point
dynamic pressure
stagnation pressure

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