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Hydraulics and Fluid Mechanics in ME

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

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

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Hydraulics and Fluid Mechanics in ME
In order to increase sensitivity of U-tube manometer, one leg is usually inclined by angle 'θ'. Sensitivity of inclined tube to sensitivity of U-tube is equal to

1/Sinθ
Cos θ
Sinθ
1/Cosθ

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Hydraulics and Fluid Mechanics in ME
Dynamic similarity is said to exist between the model and the prototype, if both of them

None of these
Are identical in shape, but differ only in size
Are equal in size and shape
Have identical velocities

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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

adhesion
surface tension
cohesion
compressibility

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Hydraulics and Fluid Mechanics in ME
The centre of gravity of the volume of the liquid displaced is called

Centre of buoyancy
Centre of pressure
None of the listed here
Metacentre

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Hydraulics and Fluid Mechanics in ME
Centrifugal pump is started with its delivery valve

Kept fully open
Kept 50% open
Irrespective of any position
Kept fully closed

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