AG Mechanics CDE Practice Exam

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The types of gas used in the MIG welding process would not include which of the following:

  1. Acetylene

  2. Argon

  3. Carbon Dioxide

  4. Helium

The correct answer is: Acetylene

Acetylene is not typically used in the MIG (Metal Inert Gas) welding process. MIG welding commonly uses a shielding gas to protect the molten metal from atmospheric contamination. Argon, carbon dioxide, and helium are more commonly used in MIG welding for their specific properties that help control the welding process. Acetylene, while commonly used in oxy-fuel welding and cutting processes, is not a typical gas used in the MIG welding process.

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