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Gas Fitter Practice · Question

Which component is used to prevent flame rollout on an atmospheric gas furnace?

A rollout switch is a safety device that detects flames exiting the heat exchanger and shuts down the furnace.

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Question: Which component is used to prevent flame rollout on an atmospheric gas furnace?

Answer options:

  • Pressure switch ✅ Rollout switch
  • Limit switch
  • Thermocouple

Correct answer: Rollout switch

Explanation: A rollout switch is a safety device that detects flames exiting the heat exchanger and shuts down the furnace.

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