If an oxy-acetylene flame becomes carburizing, what is the likely cause?

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Multiple Choice

If an oxy-acetylene flame becomes carburizing, what is the likely cause?

Explanation:
Carburizing happens when the flame is fuel-rich, meaning there is too much acetylene relative to the amount of oxygen. In that situation, incomplete combustion leaves carbon-containing soot and a reducing environment, which deposits carbon on the workpiece surface. That contamination is what we call carburizing. To fix it, balance the flame toward neutral by reducing acetylene or increasing oxygen until you see a clean blue flame with a well-defined inner cone and minimal soot.

Carburizing happens when the flame is fuel-rich, meaning there is too much acetylene relative to the amount of oxygen. In that situation, incomplete combustion leaves carbon-containing soot and a reducing environment, which deposits carbon on the workpiece surface. That contamination is what we call carburizing. To fix it, balance the flame toward neutral by reducing acetylene or increasing oxygen until you see a clean blue flame with a well-defined inner cone and minimal soot.

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