FAA AMT (Aviation Maintenance Technician) Airframe Practice Exam

Question: 1 / 1030

What gases are generally used in the Gas Tungsten Arc (GTA) welding of aluminum?

Helium or Argon, or a mixture of both

In Gas Tungsten Arc (GTA) welding of aluminum, the gases that are generally used are Helium or Argon, or a mixture of both. Helium and Argon are inert gases that provide a stable arc during welding, protect the molten weld pool from atmospheric contamination, and help in achieving a clean and high-quality weld when working with aluminum. On the other hand, Nitrogen, Oxygen, Carbon Dioxide, and Hydrogen are not typically used in the Gas Tungsten Arc welding of aluminum due to their potential to introduce impurities and negatively affect the welding process and the quality of the weld.

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Nitrogen or Oxygen

Carbon Dioxide

Hydrogen

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