What defining characteristic is associated with Class 5 vehicles used in airport firefighting?

• A. They carry personnel only
• B. They are equipped with foam agents exclusively
• C. They have a water/AFFF capacity of 2000-3500 gallons
• D. They are designed for rapid deployment

Answer: (C)

Class 5 vehicles in airport firefighting are specifically designed to meet demanding requirements, including their capacity to carry significant amounts of water and firefighting agents. The defining characteristic of these vehicles is their water/AFFF (Aqueous Film Forming Foam) capacity, which ranges between 2000 to 3500 gallons. This large capacity is crucial for effectively combating aircraft fires and other significant emergencies that require substantial fire suppression resources.

Having such a volume is essential as it allows for sustained firefighting efforts without the immediate need for replenishing water supplies, which can be critical during incidents where quick response and prolonged firefighting capabilities are paramount. These vehicles are strategically used at airports due to their robust design, ensuring they can tackle the unique challenges presented by aircraft incidents efficiently.

The other options do not accurately capture the primary role and specifications of Class 5 vehicles. For instance, some vehicles that focus solely on personnel transport or are exclusively outfitted with foam agents do not fit the comprehensive firefighting needs that Class 5 vehicles fulfill. Additionally, while rapid deployment is a feature of many firefighting vehicles, it does not uniquely define Class 5, which stands out more prominently due to its substantial water and foam capacity.