Question 765 Deck General

The correct answer is A) Foam. According to the Chemical Data Guide, foam is the recommended extinguishing agent for a petrolatum fire in an open area. Foam is effective in extinguishing petrolatum (or petroleum jelly) fires because it forms a blanket that smothers the fire and prevents the release of flammable vapors. Dry chemical, CO2, and monoxide powders are not as effective for this type of fire in an open area, as they do not provide the same level of smothering and vapor suppression as foam.