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| Q. |
In Annealing, cooling is done in which of the following medium? |
| A. | air |
| B. | water |
| C. | oil |
| D. | furnace |
| Answer» D. furnace | |
| Explanation: in annealing, after solutionising, material is used to furnace cool, means furnace is switched off and the steel sample inside is let cool down. | |
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