What term refers to an opening in a nozzle tip, duster, or granular applicator through which spray, dust, or granules flow?

• A. Orifice
• B. Nozzle
• C. Hub
• D. Valve

Answer: (A)

An orifice is the opening through which material flows in a nozzle tip, duster, or granular applicator. It’s the small hole or passage that governs how much and how fast spray, dust, or granules are discharged. The term focuses on the actual flow path, which determines discharge rate, pressure, and the resulting distribution.

The whole nozzle assembly is not just the opening, so it’s not the right term when we’re specifically talking about the passage that material passes through. The hub is a connection point or center piece, not the flow opening. A valve is a control component that can start or stop flow, but it’s the mechanism, not the opening itself.