Machine Design
A fast and loose pulley drive is used when

Shafts are arranged parallel and rotate in the opposite directions
Shafts are arranged parallel and rotate in the same directions
Shafts are arranged at right angles and rotate in one definite direction
Driven shaft is to be started or stopped whenever desired without interfering with the driving shaft

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Machine Design
Which is correct statement? Stress concentration in static loading is

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

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Machine Design
Coaxing is the procedure of increasing

Metal hardness by surface treatment
Metal resistance to corrosion by coating
Metal strength by cycling
Fatigue limit by over-stressing the metal by successively increasing loadings

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Machine Design
In oilness bearings

The oil film pressure is generated only by the rotation of the journal
Grease required to be applied after some intervals
The oil film is maintained by supplying oil under pressure
Do not require external supply of lubricant

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