Welder Red Seal · Question
A pipefitter is using carbon arc gouging to back gouge a stainless steel pipe weld. After a few minutes, the electrodes start to overheat and erode rapidly. What is the most probable cause?
Rapid erosion and overheating of carbon electrodes during gouging are primarily caused by excessive current settings for the specific electrode diameter. This o
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Question: A pipefitter is using carbon arc gouging to back gouge a stainless steel pipe weld. After a few minutes, the electrodes start to overheat and erode rapidly. What is the most probable cause?
Answer options:
- The air pressure is too low, not effectively cooling the electrode. ✅ The gouging current is set too high for the electrode size.
- The travel speed is too fast, causing the arc to wander.
- The electrode angle is too steep, concentrating the heat.
Correct answer: The gouging current is set too high for the electrode size.
Explanation: Rapid erosion and overheating of carbon electrodes during gouging are primarily caused by excessive current settings for the specific electrode diameter. This overloads the electrode, causing it to consume faster than intended.
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