What is the purpose of a fire extinguisher's discharge horn or nozzle?

• A. To direct the extinguishing agent toward the base of the fire and control the stream
• B. To produce a loud alarm for nearby people
• C. To measure the flow rate of the extinguishing agent
• D. To attach a hose for high-pressure delivery

Answer: (A)

The discharge horn or nozzle is there to focus and shape the extinguisher’s stream so you can aim it where it will do the most good. Directing the agent toward the base of the fire targets the fuel area and the hottest portion, which cools the fire more effectively and helps prevent it from re-igniting or spreading. The nozzle also lets you control the flow and spray pattern, so you can sweep across the fire, adjust distance, and avoid wasting agent or scattering it where it won’t reach the source of the flames. It isn’t for sounding alarms, measuring flow, or attaching hoses—the essential job is directing and controlling the discharge for maximum extinguishing effect.