Machine Design
When a metal or alloy is cold worked,

It is worked below recrystallization temperature
Its hardness and strength increases
Both (A) and (B)
None of these

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Machine Design
In hydrodynamic bearings

Grease is used for lubrication
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

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