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Q. |
Which of the following gases are used in Tungsten inert gas welding? |
A. | helium and neon |
B. | hydrogen and oxygen |
C. | argon and helium |
D. | carbon dioxide and hydrogen |
Answer» C. argon and helium | |
Explanation: in the tig welding process the arc is formed between a pointed tungsten electrode and the workpiece in an inert atmosphere of argon or helium. |
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