CSWIP Welder Approval Theory Exam Practice Questions - CSWIP Welder Approval Theory Exam

What is the main purpose of shielding gas in MIG/MAG welding?

To increase the penetration. To protect the molten weld pool from atmospheric contamination. To control the arc voltage. To preheat the base metal.

Correct Answer:

To protect the molten weld pool from atmospheric contamination.

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