Which of the following is an example of a fire suppression system in airports?

An automated foam system is a specific type of fire suppression system designed to quickly and effectively extinguish fires, particularly those involving flammable liquids, which are common in airport environments due to the presence of aviation fuels. These systems deploy foam, which not only cools the fire but also creates a barrier that prevents the release of flammable vapors, thus reducing the risk of re-ignition. The automated nature of these systems allows for rapid deployment in case of an emergency, enhancing safety and minimizing damage.

In contrast, water hydrants, fire extinguishers, and preventive training serve essential safety functions but do not directly constitute fire suppression systems. Water hydrants provide a water supply for firefighters but are not equipped to suppress fires on their own. Fire extinguishers, while crucial for immediate response, are typically manually operated and may not be as effective in large-scale incidents without the support of a comprehensive system. Preventive training is vital for preparing personnel to respond to emergencies and to minimize risks, but it does not directly extinguish fires. Therefore, the automated foam system is the most fitting example of a specialized fire suppression system in the airport context.