Hydraulics and Fluid Mechanics in ME
The flow in a pipe or channel is said to be uniform when

The quantity of liquid flowing per second is constant
The liquid particles at all sections have the same velocities
Each liquid particle has a definite path
The liquid particles at different sections have different velocities

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Hydraulics and Fluid Mechanics in ME
In a forced vortex motion, the velocity of flow is

directly proportional to the square of its radial distance from the axis of rotation
inversely proportional to its radial distance from the axis of rotation
directly proportional to its radial distance from axis of rotation
inversely proportional to the square of its radial distance from the axis of rotation

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Hydraulics and Fluid Mechanics in ME
A piece of metal of specific gravity 13.6 is placed in mercury of specific gravity 13.6, what fraction of it volume is under mercury?

The metal piece will be immersed in mercury by half
Metal piece will sink to the bottom
Whole of the metal piece will be immersed with its top surface just at mercury level
The metal piece will simply float over the mercury

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