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

Normalising
Process annealing
Full annealing
Spheroidising

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Machine Design
Slenderness ratio is the ratio of

Maximum size of column to minimum size of column
Width of column to depth of column
Effective length of column to least radius of gyration of the column
Effective length of column to width of column

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