Theory of Machine
A watt's governor can work satisfactorily at speeds from

200 to 300 r.p.m.
80 to 100 r.p.m.
60 to 80 r.p.m.
100 to 200 r.p.m.

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Theory of Machine
In a hydrodynamic journal bearing, there is

No lubricant between the journal and the bearing
A thick film of lubricant between the journal and the bearing
A forced 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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