Machine Design
Two shafts will have equal strength, if

Material of both the shafts is same
Twisting moment of both the shafts is same
Diameter of both the shafts is same
Angle of twist of both the shafts is same

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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
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
Both will be equally rigid

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Machine Design
Crowning on pulley helps

In decreasing the slip of the belt
To keep the belt in centre on a pulley while it is in motion
To increase pulley life
In increasing the slip of the belt

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