Machine Design Objective Questions

7. A compressed air cylinder carries approximately 70 kg/cm2 pressure at the time of delivery. The inside diameter is 25 cm. If the steel has a yield point of 2300 kg/sq cm and a safety factor of 2.5 the wall thickness should be

A. 8 mm

B. 12 mm

C. 5 mm

D. 10 mm


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