Machine Design
In replacing the V-belts, a complete set of new belts is used instead of replacing a single damaged belt because

The new belt will carry more than its share and result in short life
Belts are available in sets
New and old belts will cause vibrations
Only one belt cannot be fitted with other used belts

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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
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

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