Machine Design
When a circular beam of diameter d is subjected to a shear force F, the maximum shear stress induced will be

6F/ πd²
16F/ 3πd²
8F/ πd²
4F/ πd²

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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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