Welder Red Seal · Question
A welder is setting up for oxy-fuel cutting 12 mm mild steel plate. They notice the oxygen pressure is set to 250 kPa and the acetylene pressure to 35 kPa. What adjustment is most likely required to achieve an efficient and clean cut?
For oxy-fuel cutting 12 mm mild steel, the oxygen pressure is typically higher than the acetylene pressure. Increasing oxygen pressure provides more cutting oxy
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Question: A welder is setting up for oxy-fuel cutting 12 mm mild steel plate. They notice the oxygen pressure is set to 250 kPa and the acetylene pressure to 35 kPa. What adjustment is most likely required to achieve an efficient and clean cut?
Answer options: ✅ Increase oxygen pressure and decrease acetylene pressure.
- Decrease oxygen pressure and increase acetylene pressure.
- Increase both oxygen and acetylene pressures.
- Decrease both oxygen and acetylene pressures.
Correct answer: Increase oxygen pressure and decrease acetylene pressure.
Explanation: For oxy-fuel cutting 12 mm mild steel, the oxygen pressure is typically higher than the acetylene pressure. Increasing oxygen pressure provides more cutting oxygen flow, while slightly decreasing acetylene pressure helps maintain a neutral fame and prevents overheating.
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