Texas Pesticide Applicator Practice Exam

How much should you replace a nozzle when its flow rate varies by what percentage or more?

1. 3 percent

2. 5 percent

3. 7 percent

4. 10 percent

The correct answer is: 5 percent

Nozzles play a crucial role in the effective application of pesticides, as they determine the flow rate and droplet size, influencing how well the pesticide disperses and adheres to the target area. When a nozzle's flow rate varies by 5 percent or more, it generally indicates that the nozzle may be worn or damaged, which can negatively impact its performance. Replacing the nozzle at this threshold ensures that the pesticide is applied consistently and accurately. A deviation of 5 percent can lead to uneven application rates, which might either under-apply the pesticide, risking pest control failure, or over-apply, leading to waste and potential environmental harm. As a standard practice, monitoring and maintaining the condition of nozzles is essential for optimal pesticide application efficacy and safety.