​What Would Be an Acceptable Shielding Gas Mixture of Argon

question 13

Multiple Choice

​What would be an acceptable shielding gas mixture of argon (Ar) and oxygen (O) for GMA welds?

• A) ​Ar + 2% O2
• B) ​Ar + 1% O2
• C) ​Ar + 7% O2
• D) ​Ar + 0% O2

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