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| Q. |
Identify the incorrect statement |
| A. | Hot working performed on the metals is in a plastic state |
| B. | Much greater pressures are needed for ot working than for cold working |
| C. | When material is cold worked the resulting change in material shape brings about marked changes in the grain structure |
| D. | Structural changes in cold working are grain fragmentation and lattice distortion |
| E. | Residual stresses are set up in cold working |
| Answer» B. Much greater pressures are needed for ot working than for cold working | |
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