A minimum spraying pressure for aerial application should be around:

• A. 10 psi
• B. 30 psi
• C. 70 psi
• D. 110 psi

Answer: (B)

In aerial spraying, you need enough pressure to push the liquid out of the nozzle reliably and to form droplets that will deposit evenly on targets despite the aircraft’s fast movement through the air. If the pressure is too low, the nozzle may not deliver a consistent flow, droplets can be too irregular or large, and coverage can be spotty. If the pressure is too high, droplets become very fine, which increases drift and off-target deposition, and it can also wear nozzles more quickly. A moderate minimum pressure hits a balance: it ensures stable flow and an effective spray pattern while keeping drift under control. That’s why choosing a mid-range, steady pressure is the best approach for aerial applications.