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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The pressure intensity in kN/m2 (or kPa) at any point in a liquid is (where w = Specific weight of liquid, and h = Depth of liquid from the surface)

w
wh
w/h
h/w

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Hydraulics and Fluid Mechanics in ME
Francis turbine is best suited for

Medium head application from 24 to 180 m
Low head installation up to 30 m
High head installation above 180 m
All types of heads

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Hydraulics and Fluid Mechanics in ME
The resultant upward pressure of a fluid on a floating body is equal to the weight of the fluid displaced by the body. This definition is according to

Equilibrium of a floating body
Archimedes’ principle
Bernoulli’s theorem
Buoyancy

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Hydraulics and Fluid Mechanics in ME
The discharge through a small rectangular orifice is given by (where Cd = Coefficient of discharge for the orifice, a = Cross-sectional area of the orifice, h = Height of the liquid above the centre of the orifice)

Q = (3Cd × a)/√(2h)
Q = (2/3). Cd × a × h
Q = (Cd × a)/√(2gh)
Q = Cd × a × 2gh

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Hydraulics and Fluid Mechanics in ME
The pressure of liquid at throat in a Venturimeter is __________ than that at inlet.

Higher
Same
None of these
Lower

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Hydraulics and Fluid Mechanics in ME
Center of pressure compared to e.g. is

At same point
Above it
Above or below depending on area of body
Below it

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