Heavy Duty Equipment Technician Red Seal Exam Prep · Question
When using an oxy-acetylene cutting torch, what is the purpose of the inner cone of the flame when setting the torch for cutting?
The inner cone of the oxy-acetylene flame is responsible for preheating the metal to its kindling or ignition temperature. Once this temperature is reached, a s
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Question: When using an oxy-acetylene cutting torch, what is the purpose of the inner cone of the flame when setting the torch for cutting?
Answer options: ✅ To preheat the metal to its ignition temperature
- To cut through the metal by oxidizing it rapidly
- To provide a shielding gas for the cut
- To control the flow of oxygen and acetylene
Correct answer: To preheat the metal to its ignition temperature
Explanation: The inner cone of the oxy-acetylene flame is responsible for preheating the metal to its kindling or ignition temperature. Once this temperature is reached, a separate stream of high-pressure cutting oxygen is introduced, which oxidizes the hot metal and blows away the molten slag, creating the cut.
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