​What Shielding Gas(s) Are Recommended for the FCA Welding Practices

question 22

Multiple Choice

​What shielding gas(s) are recommended for the FCA welding practices?

• A) ​100% Ar
• B) ​75% Ar + 25% CO2
• C) ​100% CO2
• D) ​25% Ar + 75% CO2

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