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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The center of gravity of the volume of the liquid displaced by an immersed body is called

center of buoyancy
center of gravity
metacentre
center of pressure

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Hydraulics and Fluid Mechanics in ME
The intensity of pressure on an immersed surface __________ with the increase in depth.

Does not change
None of these
Decreases
Increases

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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

50 cm
52.2 cm
51 cm
52 cm

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Hydraulics and Fluid Mechanics in ME
For hydro-dynamically smooth boundary, the friction coefficient for turbulent flow is

a function of Reynolds number and relative roughness
dependent on relative roughness only
dependent only on Reynolds number
constant

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Hydraulics and Fluid Mechanics in ME
Re-entrant or Borda's mouthpiece is an __________ mouthpiece.

None of these
External
Both A and B
Internal

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

Between 2000 and 4000
More than 4000
Less than 2000
Less than 4000

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