Question 247Safety & Environmental - QMED

The correct answer is B) if applied promptly. A hand portable CO2 fire extinguisher is effective on burning oil only if applied promptly. This is because CO2 extinguishers work by displacing oxygen, cutting off the fire's air supply. For oil fires, prompt application of the CO2 is critical to smother the flames before the oil can re-ignite. The other answer choices are incorrect: A) Applying CO2 in connection with foam is not necessary for its effectiveness on oil fires. C) Preventing rekindling is an advantage of CO2, but not the reason for its effectiveness on oil fires. D) Attempting to extinguish with low velocity fog is not required before using a CO2 extinguisher on an oil fire.