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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Reynold's number is the ratio of the inertia force to the

Elastic force
Surface tension force
Gravity force
Viscous force

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Hydraulics and Fluid Mechanics in ME
The Reynold's number of a ship is __________ to its velocity and length.

Directly proportional
Square root of velocity
None of these
Inversely proportional

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Hydraulics and Fluid Mechanics in ME
Delivery head of a centrifugal pump is

Inversely proportional to N²
Directly proportional to N²
Inversely proportional to N
Directly proportional to N

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Hydraulics and Fluid Mechanics in ME
Any change in load is adjusted by adjusting following parameter on turbine

Flow
Blade velocity
Net head
Absolute velocity

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Hydraulics and Fluid Mechanics in ME
The losses are more in

transition flow
turbulent flow
critical flow
laminar flow

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Hydraulics and Fluid Mechanics in ME
In a Francis turbine runner, the numbers of blades are generally between

2 to 4
8 to 16
4 to 8
16 to 24

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