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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The stress-strain relation of the newtoneon fluid is

hyperbolic
inverse type
parabolic
linear

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Hydraulics and Fluid Mechanics in ME
The cavitation in reaction turbines is avoided, to a great extent by

All of these
Providing highly polished blades to the runner
Using stainless steel runner of the turbine
Installing the turbine below the tail race level

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Hydraulics and Fluid Mechanics in ME
Two pipe systems can be said to be equivalent, when the following quantities are same

Friction loss and flow
Flow and length
Friction factor and diameter
Length and diameter

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Hydraulics and Fluid Mechanics in ME
With an increase in size of tube, the rise or depression of liquid in the tube due to surface tension will

Decrease
Increase
Remain unchanged
Depend upon the characteristics of liquid

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Hydraulics and Fluid Mechanics in ME
For a body floating in a liquid the normal pressure exerted by the liquid acts at

e.g. of the body
metacentre
all points on the surface of the body
bottom surface of the body

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Hydraulics and Fluid Mechanics in ME
The loss of head due to viscosity for laminar flow in pipes is (where d = Diameter of pipe, l = Length of pipe, v = Velocity of the liquid in the pipe, μ = Viscosity of the liquid, and w = Specific weight of the flowing liquid)

16μvl/wd²
4μvl/wd²
32μvl/wd²
8μvl/wd²

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