Pressure applicators are categorized into two types. Which are they?

• A. Air pressure and water pressure
• B. Gravity flow and flow
• C. Manual and automatic
• D. Aerial and ground

Answer: (A)

Pressure applicators are categorized by how the spray pressure is generated. One type uses compressed air to pressurize the liquid and drive the spray out of the nozzle, atomizing it with the air flow. The other type uses a pump to create hydraulic pressure in the liquid itself, pushing it through the nozzle.

This distinction matters because air-pressure sprayers rely on a separate air source to move and atomize the liquid, often giving fine droplets, while water-pressure sprayers rely on pumped liquid pressure for propulsion, which can produce different droplet sizes and flow characteristics.

Gravity flow isn’t a pressure-based system since the liquid is moved by gravity rather than being pressurized. Manual versus automatic describes how the sprayer is operated, not how pressure is generated. Aerial versus ground refers to where the sprayer is used (from the air or on the ground), not the pressure mechanism.