Machine Design
The shearing stresses in the inner face as compared to outer face of the wire in a heavy close coiled spring is

Equal
Smaller
Larger
Larger/smaller depending on diameter of spring coil

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Machine Design
In oilness bearings

The oil film pressure is generated only by the rotation of the journal
Do not require external supply of lubricant
The oil film is maintained by supplying oil under pressure
Grease required to be applied after some intervals

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Machine Design
In hydrostatic bearings

Grease is used for lubrication
The oil film is maintained by supplying oil under pressure
Do not require external supply of lubricant
The Oil film pressure is generated only by the rotation of the journal

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