Question 1105 Deck General

The correct answer is D) 20 pound dry chemical. A type B-III fire extinguisher is classified as a portable extinguisher with a minimum rating of 20-B:C, which means it is suitable for flammable liquid and electrical fires. The 20 pound dry chemical extinguisher meets this classification, as it provides sufficient fire-fighting capability for these types of fires. The other options are incorrect because they do not meet the 20-B:C rating requirement for a type B-III extinguisher. The 12 gallon soda acid and 20 gallon foam extinguishers are larger, less portable models, while the 30 pound carbon dioxide extinguisher, although portable, does not have the minimum 20-B:C rating.