Machine Design
The circumferential and longitudinal strains in a cylindrical boiler under internal steam pressure are εc and εl respectively. The change in volume of the boiler cylinder per unit volume will be

εc + 2εl
2εc + εl
εc + εl²
εc² + εl

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Machine Design
In case of V belt drive

The belt should not touch the sides of groove in the pulley
The belt should not touch the bottom of groove in the pulley
The belt should touch the bottom of groove in the pulley
None of these

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