Which ARFF vehicle class is best for handling large aircraft emergencies, specifically those over 90 feet in length?

• A. Class I
• B. Class II
• C. Class III
• D. Class IV

Answer: (D)

Class IV ARFF vehicles are specifically designed for handling large aircraft emergencies, particularly those involving aircraft over 90 feet in length. These vehicles are equipped with a larger capacity for water and fire extinguishing agents, making them capable of delivering a substantial firefighting response needed for the more extensive fuel loads and potential hazards presented by larger aircraft.

The design of Class IV vehicles typically allows for better maneuverability around these larger aircraft and provides advanced firefighting apparatus, such as turret systems with high flow rates and larger diameter hoses, which are essential for effectively addressing fires associated with big planes. Additionally, they often include features such as off-road capabilities, which can be critical in accessing remote areas on the airfield quickly.

In contrast, the other vehicle classes—Class I, II, and III—are tailored for smaller aircraft and generally do not have the same level of firefighting capabilities or water transport capacity necessary for safely managing the risks associated with larger aircraft incidents. Thus, Class IV stands out as the appropriate choice for situations involving large aircraft.