Which of the following describes the operation time of a standard AFFF extinguisher?

The operation time of a standard AFFF (Aqueous Film-Forming Foam) extinguisher is typically in the range of 55 to 65 seconds. This duration allows the user to effectively apply the foam to an area on fire or at risk of ignition. AFFF extinguishers are designed for use on flammable liquids and provide rapid knockdown of flames by forming a blanket over the burning material, which helps to suppress vapors and extinguish the fire more efficiently.

The 55 to 65 seconds operational time ensures that the user has enough time to direct the discharge appropriately and cover the necessary area without the risk of running out of agent too quickly. This time frame is suited for many fire ground situations where the quick application of foam is critical to controlling the fire and minimizing the risk of re-ignition.