Outline a typical sequence for multi-pass FCAW welding on a 3/8-inch carbon steel butt weld (root, fill, cap) and note slag handling.

Study for the Gas Metal Arc Welding Exam, including GMAW, FCAW, and MCAW methods. Use flashcards and multiple choice questions with hints and explanations for effective learning. Get ready for your welding certification!

Start with a root pass to establish good fusion and penetration across the joint. After the root, clean off the slag so you can clearly see the weld toe and ensure the next layer will fuse properly. Then lay the fill passes to bring the weld up toward the surface, cleaning between each pass to prevent slag inclusions or contamination from interfering with fusion. When you’re near the surface, remove the slag again before the final cap pass, which finishes the weld and gives the proper contour. Throughout, keep the interpass temperature within the specified range and clean between passes to maintain good fusion and avoid cracking or defects. This sequence—root, slag removal, fill passes, slag removal, cap, and final cleaning—is the proper approach for a multi-pass FCAW weld on this thickness.