​What Can Be Done to Prevent the Backing Gas from Being

question 46

Multiple Choice

​What can be done to prevent the backing gas from being blown through the joint?

• A) ​Turn down the flow rate on the backing gas.
• B) ​Make longer tack welds to seal more of the joint opening before starting to weld.
• C) ​Put tape over the joint.
• D) ​Use a larger diameter nozzle and higher shielding flow rate to compensate for the loss.

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