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 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

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Machine Design
When the shaft rotates in anticlockwise direction at high speed in a bearing, it will

Move towards right of the bearing making metal to metal contact
Move towards right of the bearing making no metal to metal contact
Move towards left of the bearing making metal to metal contact
Have contact at the bottom most of the bearing

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