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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The ratio of the inertia force to the viscous force is called

Weber's number
Froude's number
Reynold's number
Euler's number

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Hydraulics and Fluid Mechanics in ME
Power required to drive a centrifugal pump is directly proportional to _________ of its impeller.

Fourth power of diameter
Cube of diameter
Square of diameter
Diameter

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Hydraulics and Fluid Mechanics in ME
In case of an airfoil, the separation of flow occurs

at the extreme front of body
any where between rear and front of body depending upon Reynolds number
at the extreme rear of body
midway between rear and front of body

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Hydraulics and Fluid Mechanics in ME
The power developed by a turbine is (where H = Head of water under which the turbine is working)

Directly proportional to H1/2
Directly proportional to H3/2
Inversely proportional to H3/2
Inversely proportional to H1/2

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Hydraulics and Fluid Mechanics in ME
Francis turbine is best suited for

Medium head application from 24 to 180 m
All types of heads
High head installation above 180 m
Low head installation up to 30 m

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

Increases
None of the listed here
Remain same
Decreases

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