Machine Design
Which is correct statement?

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

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Machine Design
Plastic flow in ductile materials

Lessens the seriousness of static loading stress concentration
Has no effect on it
Increases the seriousness of static loading stress concentration
Depends on other considerations

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