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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Mercury does not wet glass. This is due to property of liquid known as

surface tension
adhesion
viscosity
cohesion

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Hydraulics and Fluid Mechanics in ME
Air vessels in reciprocating pump are used to

Increase pump efficiency
Smoothen flow
Reduce acceleration to minimum
Save pump from cavitations

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Hydraulics and Fluid Mechanics in ME
The vapour pressure over the concave surface is

greater than the vapour pressure over the plane surface
less man the vapour pressure over the plane surface
zero
equal to the vapour pressure over the plane surface

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Hydraulics and Fluid Mechanics in ME
Manometer is used to measure

difference of pressure between two points
atmospheric pressure
very low pressure
pressure in pipes, channels etc

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

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

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Hydraulics and Fluid Mechanics in ME
A metal with specific gravity of 'a' floating in a fluid of same specific gravity 'a' will

Float over fluid
Partly immersed
Sink to bottom
Be fully immersed with top surface at fluid surface

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MORE MCQ ON Hydraulics and Fluid Mechanics in ME

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