Pest Control Aircraft Pilot Practice Test

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

1. Regulate the fluid temperature

2. Prevent over-spray

3. Prevent pressure buildup from trapped air

4. Enhance spray coverage

The correct answer is: Prevent pressure buildup from trapped air

Bleed valves at the ends of the spray boom serve the important function of preventing pressure buildup from trapped air. When a pest control aircraft is spraying, air can become trapped in the spray system, particularly at the ends of the spray boom where liquid flow may be minimal or non-existent. If this trapped air is not relieved, it can lead to uneven pressure distribution throughout the system. By utilizing bleed valves, any excess air can be released, ensuring that the fluid system operates under optimal conditions. This helps maintain consistent pressure, allowing for more accurate and uniform application of the pesticide. Proper management of pressure is crucial for effective pest control applications, as it directly influences the size and distribution of spray droplets. Thus, the presence of bleed valves is essential for maintaining the integrity and performance of the spraying system.