Question 330 Deck General

The correct answer is D) 12 gallons of foam. A B-III foam extinguisher is required to contain 12 gallons of foam, as per the regulations governing the size and capacity of Coast Guard-approved portable fire extinguishers. The other answer choices are incorrect because 2-1/2 gallons (A), 8 gallons (B), and 10 gallons (C) do not meet the regulatory requirement for a B-III foam extinguisher, which is specifically designed to provide a larger volume of foam for fire suppression on vessels.