Name the flames associated with oxy-acetylene welding and state where each is applicable. – NABTEB QUESTION

1. Neutral flame (Equal vol.) Oxygen and Acetylene
2. Carburizing flame (Excess Acetylene)
3. Oxidizing flame (Excess Oxygen)

1. Neutral Flame: The proper mixture of oxygen and Acetylene is used for most welds.
2. Carburizing Flame: A low-temperature flame for touch brazing
3. Oxidizing Flame: This flame has excess oxygen. The flame does not wake a strong weld and as such always harmful.