A welder is using arc-air gouging to remove a temporary retaining bracket from a structural beam. After some gouging, the beam feels significantly hotter than expected some distance from the gouge path. What could be the cause of this excessive heat input?

Question: A welder is using arc-air gouging to remove a temporary retaining bracket from a structural beam. After some gouging, the beam feels significantly hotter than expected some distance from the gouge path. What could be the cause of this excessive heat input?

Answer options:

• The compressed air pressure is too high, spreading heat.
• The electrode angle is too shallow, widening the arc. ✅ The travel speed is too slow, allowing heat to build up.
• The electrode diameter is too small for the current setting.

Correct answer: The travel speed is too slow, allowing heat to build up.

Explanation: Excessive heat input during carbon arc gouging, leading to a wider heat-affected zone and increased base material temperature, is often a consequence of a travel speed that is too slow. This allows the arc to dwell in one area for too long, transferring more heat to the workpiece.