Question 650 Deck Safety

The correct answer is D) All of the above. For a substance to burn, all three of the following conditions must be met: 1) The temperature of the substance must be equal to or above its fire point, which is the minimum temperature at which the substance will ignite and continue to burn. 2) The air must contain oxygen in sufficient quantity to support combustion. 3) The mixture of vapors from the substance with air must be within the "explosive range" - the range of concentrations where the mixture can ignite and explode. The other options alone do not fully describe the necessary conditions for a substance to burn. All three factors - temperature, oxygen, and vapor/air mixture - must be present for combustion to occur.