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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The ratio of the inertia force to the viscous force is called

Froude's number
Weber's number
Euler's number
Reynold's number

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Hydraulics and Fluid Mechanics in ME
Rain drops are spherical because of

surface tension forces
atmospheric pressure
air resistance
viscosity

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Hydraulics and Fluid Mechanics in ME
The total pressure on a horizontally immersed surface is (where w = Specific weight of the liquid, A = Area of the immersed surface, and x = Depth of the centre of gravity of the immersed surface from the liquid surface)

wA
wx
wA/x
wAx

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Hydraulics and Fluid Mechanics in ME
In a Francis turbine runner, the numbers of blades are generally between

8 to 16
2 to 4
16 to 24
4 to 8

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Hydraulics and Fluid Mechanics in ME
The resultant upward pressure of the fluid on an immersed body is called

all the above are correct
upthrust
center of pressure
buoyancy

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Hydraulics and Fluid Mechanics in ME
A moving fluid mass may be brought to a static equilibrium position, by applying an imaginary inertia force of the same magnitude as that of the accelerating force but in the opposite direction. This statement is called

Archimedes’s principle
Pascal’s law
D-Alembert’s principle
None of these

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