Machine Design
Which is correct statement?

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

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Machine Design
A woodruff key is

Fitted in pairs at right angles
A tapered key with head at one end
Capable of tilting in a recess milled out in the shaft
All of these

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