1.

       Consider the following processes             1. Gas welding                2. Thermit welding                      3. Arc welding                4. Resistance welding                    The correct sequence of these processes in increasing order of their welding temperatures is:       

A. 1, 3, 4, 2                      
B. 1, 2, 3, 4      
C. 4, 3, 1, 2                      
D. 4, 1, 3, 2
Answer» E.


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