Extended discharge: true or false that additional agent can be applied at a reduced rate?

• A. True
• B. False
• C. Extended discharge is permitted to apply additional agent quantities at a reduced rate
• D. Only for halocarbon

Answer: (C)

Extended discharge means continuing to release extinguishing agent after the initial discharge, in order to maintain the protective concentration for a longer period. The correct idea here is that you can introduce additional agent quantities, but at a reduced rate, rather than dumping more agent all at once. This staged, lower-rate supplementation helps sustain the required concentration without overshooting it or creating unsafe transient conditions.

This approach is not limited to a specific agent type; it’s a feature of the design where an extended-discharge mode is planned, using controlled, reduced-rate release through the system’s controls. The key is that any extra release is carefully metered and integrated into the overall design so occupancy safety and hold-time requirements are met.

The other options are less accurate because a simple true/false doesn’t capture the intended capability of extended discharge, and claiming it’s only for halocarbons ignores that many clean-agent systems support extended discharge in a broader sense.