Which welding processes are listed as having prequalification back gouging requirements?

• A. SMAW, MCAW, FCAW, GMAW
• B. TIG
• C. SAW
• D. GTAW

Answer: (A)

Back gouging in prequalification tests is about removing the root reinforcement to expose and inspect the weld root, ensuring the fusion and integrity of the joint. For the common arc welding methods—SMAW, MCAW, FCAW, and GMAW—the standard specifies back gouging as part of the prequalification process. This practice helps verify that the root pass would meet acceptance criteria and that any potential defects at the root can be identified through inspection.

TIG (GTAW) and SAW have different qualification rules or root inspection considerations, so back gouging isn’t part of their prequalification requirements in this context. TIG often yields very controlled, high-quality roots, and SAW uses flux-backed processes with different root configurations, leading to different prequalification expectations.