Machine Design
In a hydrodynamic lubricated bearing

There is no lubricant between the journal and the bearing
There is a thick film of 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
Which is correct statement? Stress concentration in cyclic loading is

Equally serious in both types of materials
Seriousness would depend on other factors
Very serious in ductile materials and less serious in brittle materials
Very serious in brittle materials and less serious in ductile materials

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Machine Design
When the belt speed increases

Power transmitted increases
Power transmitted remains the same
Power transmitted increases to a maximum value and then decreases
Power transmitted decreases

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