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Pick out the correct statement. | |
A. | Hot worked materials are subjected to annealing to remove internal stresses. [Wrong Answer] |
B. | Annealing of steel hardens it slightly [Wrong Answer] |
C. | Normalising of a material induces stresses. [Wrong Answer] |
D. | Tempering of a material improves ductility & toughness but reducess hardness & brittlenes. [Correct Answer] |
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