Machine Design
The process which improves the machinability of steels, but lowers the hardness and tensile strength is

Process annealing
Normalising
Spheroidising
Full annealing

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Machine Design
An open belt drive is used when

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

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Machine Design
In hydrostatic bearings

The Oil film pressure is generated only by the rotation of the journal
The oil film is maintained by supplying oil under pressure
Do not require external supply of lubricant
Grease is used for lubrication

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