Machine Design
A shaft is subjected to a maximum bending stress of 80 N/mm² and maximum shearing stress equal to 30 N/mm² at a particular section. If the yield point in tension of the material is 280 N/mm² and the maximum shear stress theory of failure is used, then the factor of safety obtained will be

3.0
3.5
2.5
2.8

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Machine Design
Cold working

Decreases the fatigue strength
Increases the fatigue strength
Alone has no influence on fatigue strength
Has no influence on fatigue strength

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