Machine Design
A special case of ductility which permits materials to be rolled or hammered into thin sheets, is called

Elasticity
Malleability
Ductility
Plasticity

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Machine Design
Stress concentration is caused due to

Pitting at points or areas at which loads on a member are applied
Abrupt change of section
All of these
Variation in properties of material from point to point in a member

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Machine Design
Slenderness ratio is the ratio of

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

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