What is the typical discharge time for most Type B extinguishers?

The typical discharge time for most Type B extinguishers is indeed 8 to 30 seconds, which allows sufficient time to effectively combat flammable liquids and gas fires. Type B extinguishers are specifically designed to handle fires involving materials like oil, gasoline, and grease, which often require a sustained and concentrated application of the extinguishing agent to control the fire and prevent re-ignition.

Discharge times within this range ensure that the user can properly aim the nozzle at the base of the fire, maintaining coverage until the flames are completely extinguished or until evacuation is necessary. Furthermore, the 8 to 30-second timeframe accounts for varying operational conditions and the size of the fire being extinguished, facilitating a balance between effective action and the need for safety.

In contrast, options that suggest shorter discharge times may not provide adequate control over more substantial fires, which can quickly escalate if not dealt with properly. Similarly, longer discharge times could lead to ineffective usage of the extinguisher, as valuable time is lost when trying to combat a fire with limited resources.