What is the lower flammability limit of propane vapor?

Prepare for the Propane Certification Test. Study with targeted flashcards and multiple-choice questions, each offering hints and insights. Ensure your readiness for the exam!

The lower flammability limit (LFL) of propane vapor is an important safety parameter, as it indicates the minimum concentration of propane in air required to sustain a flame. For propane, the LFL is approximately 2.15% by volume in air. This means that if the concentration of propane is below this level, it will not ignite, even if there is a source of ignition present.

Understanding the LFL is critical for safety practices when handling propane, as it helps in assessing the risks of fire and explosion in environments where propane is used or stored. The values provided in the other choices are outside the recognized lower flammability limit of propane, which is why they are not applicable in this context. Recognizing the correct LFL aids in developing proper ventilation and safety measures to prevent hazardous situations.

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