CWI-training-API-1104-20th-2008

Q:- Atmospheres for shielding an arc may consist of:

Posted on July 7, 2016 Updated on July 7, 2016

1. Inert gases, active gases, or mixtures of inert and active gases
2. Only inert gases are permitted
3. Only active gases are permitted
4. No gases are permitted for welding
5. none of the above

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