Machine Design
In case of V belt drive

None of these
The belt should touch the bottom of groove in the pulley
The belt should not touch the sides of groove in the pulley
The belt should not touch the bottom of groove in the pulley

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Machine Design
In oilness bearings

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

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Machine Design
Cold working

Alone has no influence on fatigue strength
Increases the fatigue strength
Has no influence on fatigue strength
Decreases the fatigue strength

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