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Question
The cracks in helical springs used in railway carriages usually start on the inner side of the coil because of the fact that
Options:
A .  It is subjected to a higher cyclic loading than the outer side
B .  It is subjected to a higher stress than the outer side
C .  It is more stretched than the outer side during the manufacturing process
D .  It has a lower curvature than the outer side
Answer: Option A

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