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Q. |
Auto frettage is a |
A. | extra cover provided on seamless pipes to increase their hoop stress |
B. | a means of inducing favourable residual stresses in pressure vessels |
C. | Increasing the diameter of threaded portion |
D. | a heat treatment for pressure vessels subjected to low temperatures |
E. | surface coating process |
Answer» B. a means of inducing favourable residual stresses in pressure vessels |
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