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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
In a footstep bearing, if the radius of the shaft is doubled, then the torque required to overcome the viscous resistance will be

Eight times
Four times
Sixteen times
Double

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Hydraulics and Fluid Mechanics in ME
Principle of similitude forms the basis of

designing models so that the result can be converted to prototypes
comparing two identical equipments
hydraulic designs
comparing similarity between design and actual equipment

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Hydraulics and Fluid Mechanics in ME
The power produced by the reaction turbine is ________ to the head of water.

None of these
Inversely proportional
4th power
Directly proportional

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Hydraulics and Fluid Mechanics in ME
An impulse turbine is used for

High head of water
High discharge
Low head of water
Medium head of water

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Hydraulics and Fluid Mechanics in ME
Which of the following pump is generally used to pump highly viscous fluid?

Air lift pump
Reciprocating pump
Centrifugal pump
Screw pump

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Hydraulics and Fluid Mechanics in ME
If the weight of a body immersed in a fluid exceeds the buoyant force, then the body will

tend to move downward and it may finally sink
None of these
rise until its weight equals the buoyant force
float

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