What can improper travel angle cause?

• A. Porosity, poor penetration, and poor gas coverage
• B. Increased strength
• C. Warping
• D. No effect

Answer: (A)

Travel angle controls how the weld pool is fed and how the shielding gas blankets it. When the angle is not right, the shielding gas can be blown away or fail to cover the weld pool properly, which allows air to mix with the molten metal and creates porosity as it solidifies. At the same time, the angle affects heat direction and how deeply the weld penetrates; an improper angle can lead to shallow penetration or inconsistent fusion. The combination of gas being disturbed and uneven heat input also results in poor gas coverage, reinforcing the presence of porosity and weak, under-penetrated welds. Increased strength isn’t typically produced by a bad travel angle, and no effect would ignore these common welding defects, so the best description of what improper travel angle causes is porosity, poor penetration, and poor gas coverage.