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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The eddy viscosity for turbulent flow is

a function of temperature only
independent of the flow
dependent on the flow
a physical property of the fluid.

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

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

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Hydraulics and Fluid Mechanics in ME
An air vessel is provided at the summit in a siphon to

Maintain pressure difference
Increase velocity
Increase discharge
Avoid interruption in the flow

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Hydraulics and Fluid Mechanics in ME
In order to avoid cavitation in centrifugal pumps

The suction pressure should be low
The delivery pressure should be low
The suction pressure should be high
The delivery pressure should be high

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Hydraulics and Fluid Mechanics in ME
The body will sink down if the force of buoyancy is __________ the weight of the liquid displaced.

Equal to
More than
None of these
Less than

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Hydraulics and Fluid Mechanics in ME
A flow through a long pipe at decreasing rate is called __________ uniform flow.

Steady
Unsteady
Both A and B
None of these

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