Agriculture Weed Control Practice Exam 2026 – Complete Prep for Category 103

Anemometers are used to tell how fast the air is moving past a point. They specifically measure wind speed, which is different from humidity, temperature, or air pressure—each of those is measured by a separate instrument (hygrometer, thermometer, barometer). In agricultural weed control, wind speed matters for things like spray drift risk and timing of applications, so knowing the wind speed helps make safer, more effective decisions. Common designs include cup or propeller types, but all aim to convert air motion into a readable speed, with units like meters per second, kilometers per hour, or miles per hour.