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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
A turbine develops 10000 kW under a head of 25 meters at 135 r.p.m. Its specific speed is

175.4 r.p.m.
275.4 r.p.m
215.5 r.p.m.
241.5 r.p.m.

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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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Hydraulics and Fluid Mechanics in ME
Which of the following pump is successfully used for lifting water to the boilers?

Airlift pump
Centrifugal pump
Reciprocating pump
Jet pump

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Hydraulics and Fluid Mechanics in ME
Euler’s dimensionless number relates the following

viscous force and inertial force
pressure force and inertial force
viscous force and buoyancy force
inertial force and gravity

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Hydraulics and Fluid Mechanics in ME
Dynamic similarity is said to exist between the model and the prototype, if both of them

Are identical in shape, but differ only in size
None of these
Have identical velocities
Are equal in size and shape

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Hydraulics and Fluid Mechanics in ME
The factional resistance of a pipe varies approximately with __________ of the liquid.

Pressure
Square of velocity
Cube of velocity
Velocity

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