GMAW Welding Level 2 Exam Prep 2026 – Complete Practice Test

Gas Metal Arc Welding relies on a shielding gas to protect the molten weld from the surrounding air. In windy conditions, that shielding gas can be blown away or quickly dispersed, allowing air to contaminate the weld. This contamination causes porosity and a weaker, inconsistent weld bead. Because the gas shield is easily disrupted by wind, GMAW is not well suited for windy outdoor areas. In practice, welders often switch to flux-cored arc welding, which shields the weld with flux fumes, or they use windbreaks or enclosures to minimize gas loss when outdoor welding is necessary.