Machine Design
The expression 0.175 - 0.841/T is the Lewis form factor for

14½° composite and full depth involute system
20° full depth involute system
None of these
20° stub system

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Machine Design
Which is correct statement?

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
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

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