Which nozzle pattern is described as spray distribution where the center has minimal droplets, creating a donut-shaped spray?

Which nozzle pattern is described as spray distribution where the center has minimal droplets, creating a donut-shaped spray?

• A. Solid-stream
• B. Flat-fan
• C. Hollow-cone pattern
• D. Full-cone

Answer: (C)

A hollow-cone nozzle creates a ring of spray rather than filling the center. The droplets exit outward in a circular pattern around the nozzle axis, so the middle area receives few or no droplets, giving a donut-shaped distribution on the target. In contrast, a solid-stream gives a concentrated jet, a flat-fan lays down a broad, uniform sheet across its width (including the center), and a full-cone produces a continuous cone with droplets throughout—including the center.

A hollow-cone nozzle creates a ring of spray rather than filling the center. The droplets exit outward in a circular pattern around the nozzle axis, so the middle area receives few or no droplets, giving a donut-shaped distribution on the target.

In contrast, a solid-stream gives a concentrated jet, a flat-fan lays down a broad, uniform sheet across its width (including the center), and a full-cone produces a continuous cone with droplets throughout—including the center.