Question 640 Deck Safety

The correct answer is B) 1% to 10%. The explosive range, also known as the flammable range, of petroleum vapors mixed with air is the range of concentrations within which the vapors can ignite and explode. For most petroleum products, this range is typically between 1% and 10% by volume of the vapor in air. The other options are incorrect because 0% to 1% would be too low to be considered the explosive range, 10% to 15% would be too high, and 12% to 20% would also be outside the typical explosive range for petroleum vapors.