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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The discharge through a reaction turbine ___ with the increase in unit speed.

Increases
Remain same
None of the listed here
Decreases

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Hydraulics and Fluid Mechanics in ME
In an external mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to 0.89 times the height of the liquid, above the vena contracta.

None of these
More than
Equal to
Less than

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Hydraulics and Fluid Mechanics in ME
Ratio of inertia force to surface Jension is known as

Froude number
Reynold’s number
Weber’s number
Mach number

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Hydraulics and Fluid Mechanics in ME
The gross or total head of the turbine is the ___________ of the water levels at the head race and tail race.

Product
None of these
Sum
Difference

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Hydraulics and Fluid Mechanics in ME
For centrifugal pump impeller, the maximum value of the vane exit angle is

25° to 30°
15° to 20°
10° to 15°
20° to 25°

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Hydraulics and Fluid Mechanics in ME
A flow in which __________ force is dominating over the viscosity is called turbulent flow.

Inertia
Viscous
Elastic
Surface tension

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