MCQOPTIONS
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				| 1. | 
                                    A type of welding flows, which is the result of a perfect proportion and mixture of acetylene and oxygen and is used for fusion welding of steel and cast iron, is$? | 
                            
| A. | Carburizing flame | 
| B. | Oxidizing flame | 
| C. | Oxy-acetylene flame | 
| D. | Neutral flame | 
| Answer» E. | |