Hollow shafts can be made as strong as solid shafts by making the twisting moments of both the shafts same. Shafts made by _____________ have residual stresses ?
Correct answer: B. Cold rolling
- A. Forging
- B. Cold rolling
- C. Hot rolling
- D. Casting
Explanation
Cold working such as cold rolling plastically deforms the metal without allowing recovery, leaving residual stresses. Hot rolling and annealing at elevated temperature generally relieve much of this stress.
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