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Pick out the wrong statement. | |
A. | The toughness of a material decreases, when it is heated. [Wrong Answer] |
B. | Crane hooks are normally made of wrought iron. [Wrong Answer] |
C. | Cold working of a metal decreases its fatigue strength. [Correct Answer] |
D. | The temperature at which new grains are formed in a metal is known as the recrystallisation temperature. [Wrong Answer] |