Machine Design
Form coefficient of spring is

Ratio of coil diameter to wire diameter
Its capability of storing energy
Concerned with strength of wire of spring
Load required to produce unit deflection

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Machine Design
In a hydrodynamic lubricated bearing

There is no lubricant between the journal and the bearing
There is a thick film of lubricant between the journal and the bearing
The lubricant is forced between the journal and the bearing, by external pressure
There is a thin film of lubricant between the journal and the bearing

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