Certified Safety Professional Practice Exam

An air purifying respirator utilizes a filter, cartridge, or canister to remove specific air contaminants from the environment before the air is inhaled by the wearer. These components are designed to capture harmful particles, gases, and vapors, effectively providing a protective barrier against a range of airborne hazards.

Filters are commonly used to trap solid particulates, while cartridges are equipped with specific absorbent materials that target particular gases or vapors. Canisters may combine these functions, providing versatility for different contaminants. This selection allows for the customization of respiratory protection based on the specific air quality risks present in a given setting.

In contrast, an oxygen tank is used to supply breathable oxygen but does not purify air; a mechanical fan aids in ventilation but does not remove contaminants; and a chemical scrubber is typically employed in industrial processes to remove gases from exhaust rather than being part of personal respiratory protection equipment. Thus, the air purifying respirator's design and function focus specifically on filtering and removing contaminants through its built-in components.