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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Resultant pressure of the liquid in the case of an immersed body acts through

Metacentre
Centre of buoyancy
Centre of gravity
Centre of pressure

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Hydraulics and Fluid Mechanics in ME
The working of which of the following hydraulic units is based on Pascal's law?

Hydraulic coupling
Hydraulic press
Jet pump
Air lift pump

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Hydraulics and Fluid Mechanics in ME
The property of a fluid which enables it to resist tensile stress is known as

cohesion
surface tension
compressibility
adhesion

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Hydraulics and Fluid Mechanics in ME
The discharge through an external mouthpiece is given by (where a = Cross-sectional area of the mouthpiece, and H = Height of liquid above the mouthpiece)

5.85 aH.√(2g)
1.585 a.√(2gH)
0.855 a.√(2gH)
1.855 aH.√(2g)

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Hydraulics and Fluid Mechanics in ME
According to fan laws, at constant weight of air or gas, the speed, capacity and pressure vary

Inversely as density
Directly as the air or gas density
As square of density
Inversely as square root of density

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Hydraulics and Fluid Mechanics in ME
The increase in pressure at the outer edge of a drum of radius (r) completely filled up with liquid of density (ρ) and rotating at (ω) rad/s is

ρ ω2 r2
2ρ ω2 r2
ρ ω2 r2/2
ρ ω2 r2/4

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