Machine Design
Stress concentration factor is defined as the ratio of

Nominal stress to the endurance limit
Nominal stress to the maximum stress
Maximum stress to the nominal stress
Maximum stress to the endurance limit

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Machine Design
Which is correct statement?

Both will be equally rigid
A member made of cast iron will generally be more rigid than a member of equal load carrying ability made of steel
A member made of steel will generally be more rigid than a member of equal load carrying ability made of cast iron
Which one is rigid will depend on several other factors

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Machine Design
The fatigue stress concentration factor is defined as

The product of the endurance limits with and without stress concentration
All of these
The ratio of endurance limit with stress concentration to the endurance limit without stress concentration
The ratio of endurance limit without stress concentration to the endurance limit with stress concentration

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