Technical Standards and Safety Authority (TSSA) G3 Practice Exam

Atmospheric burners are designed to operate under:

1. Normal atmospheric pressure with low gas pressure

2. High air pressure with low gas pressure

3. Atmospheric pressure with high gas pressure

4. Compressed air pressure with high gas pressure

The correct answer is: Normal atmospheric pressure with low gas pressure

Atmospheric burners are specifically engineered to function efficiently at normal atmospheric pressure. This design allows these burners to utilize the natural upward movement of heated gases, combining air and gas for combustion without the need for mechanical assistance in drawing air into the burner. The low gas pressure is crucial; it ensures that the gas is introduced into the combustion zone in a controlled manner, allowing for stable and efficient burning under standard air pressure conditions. This combination is important because it enables the burner to operate safely and effectively in various residential and commercial applications where such conditions are prevalent. The other options introduce conditions that either exceed or improperly specify the operational boundaries of atmospheric burners, making them unsuitable for such burner types. High air pressure or compressed air would require different systems, such as forced draft burners, which are not compatible with the atmospheric burner design.