Which type of air filter uses oiled cotton gauze with aluminum wire mesh for increased filtering capabilities?

• A. Paper
• B. Oil Foam
• C. Oil Bath
• D. Oiled Gauze

Answer: (D)

The idea here is a specific filter media design that uses oiled cotton gauze layered over a supporting mesh. When cotton gauze is coated with oil, it creates a sticky surface that traps fine dust more effectively than dry media, while the aluminum wire mesh provides rigidity and keeps the gauze from collapsing under airflow. This combination expands the effective filtration area and helps maintain good airflow, which is why it’s chosen for high-performance air filters.

Oil-coated gauze filters are distinct from other options: paper filters are typically dry and use different fiber structures, oil foam uses foam material rather than cotton gauze, and an oil bath setup involves filter elements submerged in oil rather than a gauze-and-mesh construction.