Theory of Machine
When the relation between the controlling force (Fc) and radius of rotation (r) for a spring controlled governor is Fc = ar + b, then the governor will be

None of these
Isochronous
Unstable
Stable

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Theory of Machine
In a hydrodynamic journal bearing, there is

A forced 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
No lubricant between the journal and the bearing

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