Heavy Duty Equipment Technician Red Seal Exam Prep · Question
A heavy equipment technician is using a GMAW (MIG) welder for a structural repair. They notice that the weld bead is very narrow, tall, and has minimal penetration. The wire feed speed is adequate, and the shielding gas flow is correct. What adjustment should the technician most likely make?
A narrow, tall bead with minimal penetration in GMAW often indicates that the voltage is too low relative to the wire feed speed. Increasing the voltage will wi
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Question: A heavy equipment technician is using a GMAW (MIG) welder for a structural repair. They notice that the weld bead is very narrow, tall, and has minimal penetration. The wire feed speed is adequate, and the shielding gas flow is correct. What adjustment should the technician most likely make?
Answer options: ✅ Increase the voltage setting
- Decrease the voltage setting
- Increase the wire feed speed further
- Decrease the travel speed
Correct answer: Increase the voltage setting
Explanation: A narrow, tall bead with minimal penetration in GMAW often indicates that the voltage is too low relative to the wire feed speed. Increasing the voltage will widen the arc, flatten the bead, and typically increase penetration, improving the weld profile. Adjusting wire feed speed or travel speed alone might not correct the bead shape or penetration as effectively as a voltage adjustment in this specific scenario.
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