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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Coefficient of discharge Cd is equal to (where Cc = Coefficient of contraction, Cv = Coefficient of velocity, and Cr = Coefficient of resistance)

Cc × Cv
Cc × Cr
Cc/Cr
Cv × Cr

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Hydraulics and Fluid Mechanics in ME
Euler’s dimensionless number relates the following

pressure force and inertial force
inertial force and gravity
viscous force and buoyancy force
viscous force and inertial force

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Hydraulics and Fluid Mechanics in ME
Viscosity of water in comparison to mercury is

Same
Higher/lower depending on temperature
Higher
Lower

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

friction factor and diameter
flow and length
friction loss and flow
length and diameter

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Hydraulics and Fluid Mechanics in ME
The maximum hydraulic efficiency of an impulse turbine is (where φ = Angle of blade tip at outlet)

(1 - sin φ)/2
(1 + sin φ)/2
(1 + cos φ)/2
(1 - cos φ)/2

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Hydraulics and Fluid Mechanics in ME
The dynamic viscosity of the liquid __________ with rise in temperature.

Increases
None of these
Remain unaffected
Decreases

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