Technical Standards and Safety Authority (TSSA) G3 Practice Exam

Which burner does NOT have a mechanical device for supplying combustion air?

1. Natural draft burner

2. Combustion burner

3. Power burner

4. Non-mechanical burner

The correct answer is: Natural draft burner

The natural draft burner operates based on the principle of buoyancy, utilizing the natural rise of hot gases to create a draft that facilitates the intake of combustion air. Instead of employing a mechanical device to control or enhance the airflow, it relies solely on the temperature difference between the combustion gases and the surrounding air. This makes it a passive system that depends on gravitational forces to manage air supply. In contrast, combustion burners, power burners, and non-mechanical burners may incorporate various forms of mechanical or forced draft systems to control combustion air flow more precisely. For example, power burners utilize fans or blowers to actively supply combustion air, ensuring optimal performance regardless of ambient conditions. Understanding the operational principles of these burner types clarifies why natural draft burners stand out as not utilizing mechanical devices for combustion air supply.