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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The property of a liquid which offers resistance to the movement of one layer of liquid over another adjacent layer of liquid, is called

Capillarity
Viscosity
Surface tension
Compressibility

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Hydraulics and Fluid Mechanics in ME
Kinematic viscosity is dependent upon

Distance
Pressure
Density
Flow

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Hydraulics and Fluid Mechanics in ME
Cavitation is caused by

low pressure
high pressure
high velocity
weak material

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Hydraulics and Fluid Mechanics in ME
The fluid forces considered in the Navier Stokes equation are

gravity, pressure and turbulent
gravity, pressure and viscous
gravity, viscous and turbulent
pressure, viscous and turbulent

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Hydraulics and Fluid Mechanics in ME
If V1 and V2 are the velocities of water at inlet and outlet of the draft tube respectively, then the efficiency of a draft tube is

(V­1² - V2²) / V1²
V1 / (V1 - V2)
V1² / (V1² - V2²)
(V­1 - V2) / V1

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Hydraulics and Fluid Mechanics in ME
The most efficient section of a channel is

Square
Rectangular
Trapezoidal
Triangular

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