Which factor should be minimized to reduce spray drift toward bystanders?

• A. Crosswind toward bystanders
• B. Wind speed away from bystanders
• C. Distance to bystanders
• D. Humidity

Answer: (A)

Spray drift follows the air flow. If the wind is crossing toward bystanders, droplets can be blown from the spray path directly into their area, increasing exposure. Minimizing that crosswind toward bystanders reduces the chance the plume reaches them, which is the most direct way to lower drift. While wind blowing away from bystanders, greater distance, and other factors can help, the key action is reducing the crosswind component that would carry spray toward bystanders. Humidity can influence droplet behavior, but it doesn’t determine whether the plume will reach bystanders as strongly as the wind direction does.