Machine Design
The value of stress concentration factor depends upon

Material of the part
Geometry of the part
Material and geometry of the part
None of these

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Machine Design
In oilness bearings

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

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Machine Design
When the belt speed increases

Power transmitted increases
Power transmitted increases to a maximum value and then decreases
Power transmitted decreases
Power transmitted remains the same

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