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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Froude's number is the ratio of inertia force to

Pressure force
Gravity force
Surface tension force
Elastic force

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Hydraulics and Fluid Mechanics in ME
Water is _________ liquid.

Both A and B
A compressible
None of these
An incompressible

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Hydraulics and Fluid Mechanics in ME
When the Mach number is more than 6, the flow is called

Hyper-sonic flow
Sub-sonic flow
Super-sonic flow
Sonic flow

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Hydraulics and Fluid Mechanics in ME
According to Francis formula, the discharge over a rectangular weir is (where n = Number of end contractions)

(2/3) × Cd (L - nH) × √(2g) × H5/2
(2/3) × Cd (L - 0.1nH) × √(2g) × H3/2
(2/3) × Cd (L - nH) × √(2g) × H²
(2/3) × Cd (L - nH) × √(2gh)

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

Have identical velocities
Have identical forces
Are identical in shape, but differ only in size
Are equal in size and shape

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Hydraulics and Fluid Mechanics in ME
Which of the following turbine is preferred for a specific speed of 60 to 300 r.p.m.?

Francis turbine
Kaplan turbine
Pelton wheel
None of these

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