What equipment removes particulates from air using inertial, centrifugal forces, and gravity?

The correct choice, which is the cyclone, effectively utilizes inertial and centrifugal forces, along with gravity, to separate particulates from the air. In a cyclone, the air stream enters the unit tangentially, creating a spiral flow pattern. This design leads to the acceleration of particulate matter due to centrifugal force, causing heavier particles to move outward and downward to the collection area. Simultaneously, gravity assists in pulling these heavier particles down, resulting in efficient separation from the air stream.

This method is particularly effective for larger particles, and the design allows for relatively low maintenance and operational costs compared to other air filtration systems. Cyclones are often used in various industrial applications where dust and particulates need to be controlled.