Welding testOne Big Tip for Passing Aluminum TIG Welding Test February 16, 2021 - Leave a Comment weldingtipsandtricksTue, February 16, 2021 3:11amURL:Embed:But not for a welding test. Or for critical applications. For a welding certification test, the 3 C’s really come into play. 1. Clean 2. Clean 3. Clean In this weekly …