Illinois Right-Of-Way Pesticide Applicator Practice Exam 2025 – The Comprehensive All-in-One Guide to Exam Success!

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What pressure range is commonly used for guns and nozzles to spray herbicides?

100 - 200 psi

250 - 300 psi

Between 350 - 450 psi

The commonly used pressure range for guns and nozzles to spray herbicides is typically between 350 and 450 psi. This range is optimal for achieving effective coverage and penetration of the herbicide onto the target vegetation while minimizing drift and excessive droplet size, which can lead to less effective application.

Using a pressure within this range allows for a uniform spray pattern that ensures that the herbicide makes contact with the treated areas. At lower pressures, the spray may not effectively reach the necessary surfaces, while higher pressures could create mist that drifts away from the intended target, potentially causing environmental concerns and non-target damage.

Understanding the importance of proper pressure settings is crucial for effective herbicide application, as it directly impacts efficacy and safety.

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500 - 600 psi

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