Machine Design
Stress concentration is caused due to

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

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Machine Design
Tapered roller bearings can take

Radial load only
Both radial and axial loads and the ratio of these being greater than unity
Both radial and axial loads and the ratio of these being less than unity
Axial load only

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