When must ARFF vehicle agent discharge begin after reaching the scene?

• A. 15 seconds
• B. 30 seconds
• C. 1 minute
• D. 2 minutes

Answer: (B)

The appropriate time frame for an Aircraft Rescue and Firefighting (ARFF) vehicle to begin discharging its agent after arriving at the scene is 30 seconds. This is critical due to the short time available to effectively suppress or control a fire, especially in aircraft incidents where rapid response can significantly reduce the extent of damage and increase the chances of survival for any occupants.

Thirty seconds allows for a quick assessment of the situation by the responding personnel while still enabling them to initiate firefighting efforts promptly. Research and training protocols emphasize that within this time frame, firefighters can determine the best strategy for agent application based on the fire's location and intensity, ensuring they are actively engaged in mitigation as quickly as possible.

A more extended delay, such as one minute or two minutes, could allow the fire to spread and intensify, making it more difficult to control, which is why those options are less effective. Understanding the urgency in the context of airport emergencies can enhance the readiness and efficient response of ARFF crews.