The ___ nozzle will discharge a wide range of flows with an effective fire stream.

The ___ nozzle will discharge a wide range of flows with an effective fire stream.

• A. Set gallonage
• B. Solid
• C. Automatic
• D. Proportioner

Answer: (C)

An automatic nozzle is designed to adapt the water flow to different fire conditions while keeping the nozzle pressure within a practical range, so it can deliver a wide range of flows and still produce an effective fire stream. Its internal mechanism automatically adjusts to the demand, letting you increase or decrease flow without losing stream quality. This flexibility is essential for matching the stream pattern and reach to the fire’s size and location. A solid bore nozzle provides a fixed, solid stream with limited flow variation; a fixed gallonage nozzle would offer only a single preset flow; and a proportioner is used to mix foam concentrate, not to vary the water flow to maintain an effective stream.

An automatic nozzle is designed to adapt the water flow to different fire conditions while keeping the nozzle pressure within a practical range, so it can deliver a wide range of flows and still produce an effective fire stream. Its internal mechanism automatically adjusts to the demand, letting you increase or decrease flow without losing stream quality. This flexibility is essential for matching the stream pattern and reach to the fire’s size and location. A solid bore nozzle provides a fixed, solid stream with limited flow variation; a fixed gallonage nozzle would offer only a single preset flow; and a proportioner is used to mix foam concentrate, not to vary the water flow to maintain an effective stream.