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Why hydrogen not used excessively for welding?(a) increases welding rate(b) decreases welding rate(c) destroys the metal plate(d) affects the weldThe question was posed to me by my school principal while I was bunking the class.Query is from Welding Process in division Welded Connections of Design of Steel Structures

Answer»

The correct ANSWER is (d) affects the weld

The EXPLANATION is: HYDROGEN causes weld to CRACK. Hence most of the welding PROCESSES are low hydrogen welding process.



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