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| Q. |
In which of the following type of flame, oxygen is deficient in proportion with acetylene? |
| A. | neutral flame |
| B. | oxidizing flame |
| C. | carburizing flame |
| D. | both oxidizing flame and carburizing flame |
| Answer» C. carburizing flame | |
| Explanation: the carburizing flame has excess acetylene then oxygen. reducing flame is used for the welding of low carbon and alloy steel. | |
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