Which nozzle type produces a solid stream for reach and penetration?

Which nozzle type produces a solid stream for reach and penetration?

• A. Fog nozzle
• B. Smooth-bore nozzle
• C. Rotary nozzle
• D. Fog stream nozzle

Answer: (B)

Nozzle design shapes water pattern, which determines reach and penetration. A smooth-bore nozzle yields a solid stream because its simple, fixed opening creates a narrow, cohesive jet with minimal air entrainment. This keeps the water moving as one continuous column at high velocity, so it travels farther and maintains momentum long enough to penetrate through lighter barriers or flames before dispersing. The energy stays concentrated rather than being sprayed into many droplets, which is why this pattern is favored when you need distance and the ability to reach the fire from a distance or push through obstructed areas. Fog patterns, by contrast, break water into many droplets, absorbing heat quickly but losing reach and penetrating capability, while rotary patterns typically blanket an area rather than deliver a focused, long-range jet.