When does drift risk increase?

When does drift risk increase?

• A. With rain
• B. At night
• C. In still air
• D. With wind

Answer: (D)

Drift risk comes from how air moves droplets after they’re sprayed. The wind is the main force that carries spray droplets away from the target area. The stronger and more persistent the wind, the farther droplets can travel before they settle, so drift increases with wind. In still air, there’s little air movement to push droplets off target, so drift is much lower. Rain or night conditions don’t inherently drive drift the way wind does, and while night can involve different air stability, the direct factor that increases drift here is wind.

Drift risk comes from how air moves droplets after they’re sprayed. The wind is the main force that carries spray droplets away from the target area. The stronger and more persistent the wind, the farther droplets can travel before they settle, so drift increases with wind. In still air, there’s little air movement to push droplets off target, so drift is much lower. Rain or night conditions don’t inherently drive drift the way wind does, and while night can involve different air stability, the direct factor that increases drift here is wind.