NATE Oil Service Practice Questions - NATE Oil Heating (Air) Service Specialty Exam

What is the purpose of excess air in an oil burner combustion process?

To increase stack temperature for better draft To ensure enough oxygen is present for complete combustion of all fuel To cool the heat exchanger and prevent cracking To lower the CO2 reading in the flue gas

Correct Answer:

To ensure enough oxygen is present for complete combustion of all fuel

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