Machine Design
A woodruff key is

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

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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
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
Which one is rigid will depend on several other factors

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