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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The viscosity of water at 20°C is

One poise
One stoke
One centipoise
One centistoke

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Hydraulics and Fluid Mechanics in ME
A flow in which the volume of a fluid and its density does not change during the flow is called _________ flow.

Viscous
Compressible
None of these
Incompressible

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

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

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Hydraulics and Fluid Mechanics in ME
A tank of uniform cross-sectional area (A) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to empty the tank completely will be

(2AH₁)/(Cd × a√2g)
(2AH₁3/2)/(Cd × a√2g)
(2A√H₁)/(Cd × a√2g)
(2AH₁²)/(Cd × a√2g)

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Hydraulics and Fluid Mechanics in ME
A square surface 3 m × 3 m lies in a vertical line in water pipe its upper edge at water surface. The hydrostatic force on square surface is

27,000 kg
18,000 kg
9,000 kg
13,500 kg

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

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

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