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| Q. |
Which of the following welding process in which heat is produced for welding by a chemical reaction? |
| A. | resisting welding |
| B. | thermit welding |
| C. | forge welding |
| D. | gas welding |
| Answer» B. thermit welding | |
| Explanation: the thermite process is a chemical reaction in which a metal oxide (preferably molten) is displaced by another molten metal which is more reactive than the metal in the metal oxide, releasing a lot of heat. example: | |
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