Which statement correctly contrasts GMAW and GTAW in terms of electrode usage and production rate?

• A. GMAW uses a continuously fed consumable wire electrode; GTAW uses a non-consumable tungsten electrode with separate filler metal; GMAW is generally faster and better for production, while GTAW offers higher precision and weld quality.
• B. GMAW uses a non-consumable tungsten electrode; GTAW uses a consumable wire; GMAW is slower.
• C. GMAW uses separate filler metal always; GTAW never uses filler metal; rates are similar.
• D. GMAW cannot produce welds with high quality; GTAW always faster.

Answer: (A)

Electrode usage and production rate differences between GMAW and GTAW. In GMAW, a continuously fed consumable wire electrode serves as both the electrode and the filler metal; the arc melts the wire as it is fed, building the weld metal quickly and supporting high deposition rates, which makes it efficient for production work. In GTAW, the electrode is a non-consumable tungsten tip, and any filler metal is added separately with a filler rod; since the electrode doesn’t melt, deposition is slower and welding is more controlled, leading to higher precision and weld quality. That’s why GMAW is typically faster and better for production, while GTAW is chosen for critical joints requiring superior quality and precision. The other statements aren’t a fit because they mix up which electrode is used for each process, claim GTAW never uses filler metal, or say GTAW is faster, which isn’t generally the case.