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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The total energy line lies over the centre line of the pipe by an amount equal to

Pressure head
Pressure head - velocity head
Pressure head + velocity head
Velocity head

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Hydraulics and Fluid Mechanics in ME
The specific weight of sea water is __________ that of pure water.

More than
Less than
None of these
Same as

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Hydraulics and Fluid Mechanics in ME
Which of the following pump is suitable for small discharge and high heads?

Centrifugal pump
Axial flow pump
Mixed flow pump
Reciprocating pump

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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
The rise or depression of liquid in a tube due to surface tension will increase in size of tube will

Remain unaffected
Decrease
Increase
May increase or decrease depending on the characteristics of liquid

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Hydraulics and Fluid Mechanics in ME
The increase in pressure at the outer edge of a drum of radius (r) completely filled up with liquid of density (ρ) and rotating at (ω) rad/s is

ρ ω2 r2/4
2ρ ω2 r2
ρ ω2 r2
ρ ω2 r2/2

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