Technical Standards and Safety Authority (TSSA) G3 Practice Exam

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Prepare for the TSSA G3 Exam. Study with quizzes, flashcards, and multiple-choice questions. Each provides valuable hints and detailed explanations to ensure readiness for your exam!

Practice this question and more.

If the gas/air velocity is too great at the port of an atmospheric burner, the flame will have a tendency to:

Flash-back
Lift off the port
Be too large
Be too small

The correct answer is: Lift off the port

In an atmospheric burner, gas and air must mix at an appropriate velocity for efficient combustion. When the gas/air velocity at the port is excessively high, the flame can experience a phenomenon known as lifting off the port. This occurs because the rapid airflow can disrupt the stable flame established at the burner port. A flame requires a certain amount of inertia and attachment to the port's surface to remain stable. If the incoming gas and air mixture travels too quickly, it can actually pull the flame away from the port, creating a gap between the flame and the port opening. This not only diminishes combustion efficiency but can also lead to incomplete combustion and higher levels of emissions. Understanding this relationship highlights the importance of maintaining optimal flow rates in gas applications to ensure both safety and efficiency in burner operation.