Deck: Safety

1. A in a noncombustible state which can be relied on to occur naturally on a regular basis
2. B capable of supporting combustion
3. C incapable of supporting combustion because the hydrocarbon vapor content makes the atmosphere below the LFL (Lower Flammable Level)
4. D incapable of supporting combustion because the hydrocarbon vapor content makes the atmosphere above the UFL (Upper Flammable Limit)

Tip: press A-D to answer