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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The ratio of absolute viscosity to mass density is known as

kinematic viscosity
specific viscosity
viscosity index
coefficient of viscosity

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Hydraulics and Fluid Mechanics in ME
A Pelton wheel is

Inward flow reaction turbine
Tangential flow impulse turbine
Outward flow impulse turbine
Inward flow impulse turbine

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Hydraulics and Fluid Mechanics in ME
The total pressure on the top of a closed cylindrical vessel of radius (r) completely filled up with liquid of specific weight (w) and rotating at (ω) rad/s about its vertical axis, is

π w ω² r⁴/4g
π w ω² r³/4g
π w ω² r²/2g
π w ω² r²/4g

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

atmospheric pressure
surface tension forces
air resistance
viscosity

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Hydraulics and Fluid Mechanics in ME
In reaction turbine, draft tube is used

For safety of turbine
To convert the kinetic energy to flow energy by a gradual expansion of the flow cross-section
To increase flow rate
To transport water downstream without eddies

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Hydraulics and Fluid Mechanics in ME
The ratio of actual work available at the turbine to the energy imparted to the wheel is known as ________ efficiency.

Mechanical
Hydraulic
Overall
None of these

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