Which statement about droplet size distribution in sprays is true when pressure is varied?

When considering the impact of pressure on droplet size distribution in spray applications, it's important to understand the mechanics of atomization. Increasing the pressure in a spray typically leads to a greater amount of energy available for breaking the liquid into droplets. This results in a higher proportion of smaller droplets in the distribution.

Smaller droplets have several advantages in pesticide applications, including improved coverage and a better ability to drift, which can be beneficial for targeting pests that are more dispersed. As pressure increases, the force applied to the liquid enhances the atomization process, leading to a greater number of smaller droplets and, consequently, a wider range of droplet sizes in the spray.

In contrast, when pressure is lower, the energy available for atomization decreases, resulting in larger droplets and a broader distribution that is less favorable for effective pesticide application. The understanding of this relationship helps operators optimize their spray systems for specific applications, making the assertion about higher pressure and smaller droplets accurate and relevant in practical aerial pesticide application scenarios.