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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The volume of a fluid __________ as the pressure increases.

Increases
None of these
Remains same
Decreases

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Hydraulics and Fluid Mechanics in ME
The hydraulic gradient line lies over the centre line of the pipe by an amount equal to the

Pressure head + velocity head
Velocity head
Pressure head - velocity head
Pressure head

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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
51 cm
52.2 cm
52 cm

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Hydraulics and Fluid Mechanics in ME
Property of a fluid by which its own molecules are attracted is called

viscosity
compressibility
adhesion
cohesion

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Hydraulics and Fluid Mechanics in ME
In case of an airfoil, the separation of flow occurs

any where between rear and front of body depending upon Reynolds number
midway between rear and front of body
at the extreme rear of body
at the extreme front of body

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Hydraulics and Fluid Mechanics in ME
The torque required to overcome viscous resistance of a collar bearing is (where R1 and R2 = External and internal radius of collar)

(μπ²N/60t) × (R₁⁴ - R₂⁴)
(μπ²N/60t) × (R₁² - R₂²)
(μπ²N/60t) × (R₁ - R₂)
μπ²N/60t) × (R₁³ - R₂³)

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