Rock the Gas Heat ESCO Exam 2025 – Fire Up Your Future in HVAC!

Question: 1 / 400

The primary cause of burner "flashback" is:

high inlet gas pressure

improper venting

low manifold pressure

"Flashback" in a burner is a dangerous occurence in which a flame starts burning back towards the fuel source, often resulting in an explosion. This is primarily caused by low manifold pressure, as it disrupts the proper balance of fuel and air in the burner. The other options, such as high inlet gas pressure, improper venting, and read-back ignition, may also contribute to burner issues, but they are not the primary cause of "flashback."

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read-back ignition

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