Red Seal Welding Practice Exam

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Which shielding medium is often used for carbon steel short circuit welding?

  1. Argon

  2. Helium

  3. Carbon dioxide

  4. Oxygen

The correct answer is: Carbon dioxide

Carbon dioxide is often used as a shielding medium for carbon steel short circuit welding because it produces a stable arc and helps to prevent oxidation of the weld. Argon, helium, and oxygen are not typically used for this type of welding and can result in increased porosity, reduced weld strength, and increased risk of arc blow.

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