What determines the flow rate (amount of spray applied) from a nozzle?

• A. Orifice Size
• B. Nozzle Type
• C. Tank Size
• D. Pump Speed

Answer: (A)

Flow rate from a nozzle is set by the size of the opening the liquid must pass through. A larger orifice lets more liquid through each minute, so the spray amount increases, while a smaller orifice reduces the flow. The nozzle opening is the primary factor that controls how much spray is emitted.

Other factors play a role in how the spray behaves but not as directly in how much is released per minute. The nozzle type mainly changes the pattern and droplet size, not the volume. Tank size doesn’t change the flow rate, and while pump speed can alter system pressure (which can affect flow), the actual, baseline amount coming out of the nozzle is governed by the orifice size.