Machine Design
In a hydrodynamic lubricated bearing

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

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Machine Design
In case of V belt drive

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

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