When performing a vertical-up weld (3F position) on structural steel using an E7018 electrode, which amperage setting and polarity would typically be preferred to achieve a controlled weld puddle and good deposition?

Question: When performing a vertical-up weld (3F position) on structural steel using an E7018 electrode, which amperage setting and polarity would typically be preferred to achieve a controlled weld puddle and good deposition?

Answer options: ✅ Direct Current Electrode Positive (DCEP) at a lower to medium amperage range.

• Direct Current Electrode Negative (DCEN) at a higher amperage range.
• Alternating Current (AC) at a high amperage range.
• Direct Current Electrode Positive (DCEP) at a very high amperage range.

Correct answer: Direct Current Electrode Positive (DCEP) at a lower to medium amperage range.

Explanation: E7018 electrodes are typically run on DCEP (reverse polarity) as it provides deeper penetration, a more stable arc, and better mechanical properties. For vertical-up welding, a lower to medium amperage range is preferred to help control the molten weld pool against gravity, preventing it from sagging or running. DCEN would result in shallower penetration and a less stable arc for E7018.