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

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

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Hydraulics and Fluid Mechanics in ME
The conditions for the stable equilibrium of a floating body are

a righting couple should be formed
the center of buoyancy and the center of gravity must lie on the same vertical line
the meta-center should lie above the center of gravity
all the above are correct

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Hydraulics and Fluid Mechanics in ME
The hammer blow in pipes occurs when

The flow of fluid through the pipe is gradually brought to rest by closing of the valve
There is excessive leakage in the pipe
The flow of fluid through the pipe is suddenly brought to rest by closing of the valve
The pipe bursts under high pressure of fluid

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