Changing to nozzles with larger openings and decreasing sprayer pressure will result in the production of smaller spray droplets.

Changing to nozzles with larger openings and decreasing sprayer pressure will result in the production of smaller spray droplets.

• A. True
• B. It depends on the pesticide
• C. Cannot be determined from the information given
• D. False

Answer: (D)

Droplet size is determined by how much energy is put into the liquid as it exits the nozzle. A smaller nozzle opening and higher pressure push the liquid out with more velocity and shear, which breaks it into many tiny droplets. A larger opening reduces exit velocity and the breakup, and lowering pressure further decreases atomization. So this combination tends to produce larger droplets, not smaller. The statement is false.

Droplet size is determined by how much energy is put into the liquid as it exits the nozzle. A smaller nozzle opening and higher pressure push the liquid out with more velocity and shear, which breaks it into many tiny droplets. A larger opening reduces exit velocity and the breakup, and lowering pressure further decreases atomization. So this combination tends to produce larger droplets, not smaller. The statement is false.