Which nozzle discharges water in a wide circular pattern when lowered vertically through a hole?

The cellar nozzle is specifically designed to discharge water in a wide circular pattern, which is particularly effective for firefighting in confined spaces such as basements or cellars. When the cellar nozzle is lowered vertically through a hole, its unique construction allows the water to spread out in a wide arc, enabling it to saturate the area more efficiently. This dispersion helps in controlling and extinguishing fire in spaces where access might be restricted, ensuring that the water reaches the fire effectively.

The other types of nozzles serve different purposes. The fog nozzle generates a fine mist or spray of water, which is suitable for cooling and fire suppression but doesn't create the wide circular coverage of the cellar nozzle. The adjustable nozzle can vary the stream from solid to fog patterns but still does not provide the wide dispersal in a vertical descent that a cellar nozzle does. Lastly, the smooth-bore nozzle delivers a solid stream of water for greater reach and penetration, but this focused stream is not designed to create a broad spray pattern either.

The cellar nozzle's particular design and intended use make it the most appropriate choice for discharging water in a wide circular pattern when lowered vertically through a hole.