Theory of Machine
In a multiple V-belt drive, if one of the belts is broken, then we should replace

The broken belt only
All the belts
None of these
The broken belt and the belts on either side of it

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Theory of Machine
In a hydrodynamic journal bearing, there is

A forced lubricant between the journal and the bearing
No lubricant between the journal and the bearing
A thick film of lubricant between the journal and the bearing
A very thin film of lubricant between the journal and the bearing such that there is contact between the journal and the bearing

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