Structural Pest Control Applicator Practice Exam

What is the best method to clear a clogged nozzle while spraying pesticides?

1. Blow the nozzle out with your mouth

2. Soak the nozzle in water

3. Use a pin or similar object to clean it

4. Check the flow rate of the pesticide

The correct answer is: Soak the nozzle in water

Soaking the nozzle in water is an effective way to clear a clogged nozzle while spraying pesticides because it helps dissolve and loosen any residue or pesticide buildup that may be causing the obstruction. Water acts as a solvent, particularly for water-soluble formulations, and can help to break down any solidified materials sticking to the nozzle. In practice, this method is often safer and more efficient than alternative techniques. Using a pin or similar object might damage the nozzle or push hardened material further into the spray mechanism, risking further clogs. Blowing the nozzle out with your mouth is not advisable as it can introduce contaminants and may also lead to exposure to pesticide residues. Although checking the flow rate is important for ensuring proper application, it does not directly address the issue of a clogged nozzle. Thus, soaking the nozzle provides a simple, effective, and safe solution for unclogging nozzles during pesticide application.