What is the function of bleed valves at the ends of the spray boom?

The function of bleed valves at the ends of the spray boom is to prevent pressure from building up from trapped air when the spray valve is opened. When operating an aerial applicator, proper pressure management is critical for effective and even pesticide application. If air becomes trapped in the spray system and pressure builds up, it can lead to inconsistent spraying, uneven distribution, and potential damage to the sprayer components.

By incorporating bleed valves, any trapped air can be released, ensuring that the fluid delivering the pesticide flows smoothly and consistently through the nozzles. This allows for a proper spray pattern and more effective application of the pesticide, ultimately leading to better coverage and reduced waste. The other options, while relevant to various aspects of fluid dynamics and pesticide application, do not specifically address the primary role of bleed valves in maintaining pressure equilibrium within the spray system.