Hydraulics and Fluid Mechanics in ME
The power absorbed (in watts) in overcoming the viscous resistance of a footstep bearing is

μ π³ N² R² /3600 t
μ π³ N² R⁴ /1800 t
μ π³ N² R⁴ /3600 t
μ π³ N² R² /1800 t

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

all the above are correct
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
a righting couple should be formed

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Hydraulics and Fluid Mechanics in ME
An orifice is said to be large, if

The velocity of flow is large
The size of orifice is large
The available head of liquid is more than 5 times the height of orifice
The available head of liquid is less than 5 times the height of orifice

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Hydraulics and Fluid Mechanics in ME
A hydraulic press is a device used

To increase the intensity of pressure of water by means of energy available from a large quantity of water at a low pressure
To lift larger load by the application of a comparatively much smaller force
To store pressure energy which may be supplied to a machine later on
All of these

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