FAA AMT (Aviation Maintenance Technician) Airframe Practice Exam

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Annealing of aluminum:

  1. Increases its melting point

  2. Reduces its ductility

  3. Removes stresses caused by forming

  4. Decreases its strength

The correct answer is: Removes stresses caused by forming

Annealing of aluminum is a heat treatment process that is done to soften the metal. By heating the aluminum to a specific temperature and then allowing it to cool slowly, the internal stresses caused by forming or shaping are relieved. This process helps improve the ductility and workability of the aluminum without significantly affecting its strength or melting point. Therefore, the correct answer is C, as annealing removes stresses caused by forming.

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