If the shielding gas nozzle angle is too steep, what may occur?

• A. Increase penetration
• B. May draw in air
• C. Improve surface finish
• D. Reduce arc stability

Answer: (B)

Shading the weld with a proper shielding gas envelope depends on directing the gas flow correctly. If the nozzle is held too steep, the gas jet is aimed more directly into the weld area and can create turbulent flow that pushes shielding gas away and even pulls in surrounding air. That air intrusion disrupts the inert blanket, increasing the risk of porosity and oxidation in the weld. To avoid this, keep the nozzle at a light, controlled angle that blankets the weld without causing air entrainment, and maintain an appropriate distance so the gas covers the pool as you weld.