FAA AMT Airframe Practice Exam 2025 – Complete Exam Prep Guide

Question: 1 / 1030

If too much acetylene is used in the welding of stainless steel, the metal will:

Turn brittle and crack

Lose its magnetic properties

Become more ductile

Absorb carbon and lose its resistance to corrosion

When too much acetylene is used in the welding of stainless steel, the metal will absorb carbon from the acetylene flame. This carbon absorption can lead to the stainless steel losing its resistance to corrosion. Stainless steel's corrosion resistance is a critical property that makes it suitable for many applications in the aviation industry. Therefore, D is the correct answer.

Choice A is incorrect because turning brittle and cracking is not a direct result of using too much acetylene in welding stainless steel. Choice B is incorrect as the magnetic properties are not affected by the use of acetylene in welding stainless steel. Choice C is also incorrect because too much acetylene does not make stainless steel more ductile.

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