What is one of the three main aspects of respiratory equipment maintenance?

One of the three main aspects of respiratory equipment maintenance is decontamination. This process is critical for ensuring that respiratory protective equipment is safe and effective for use. Decontamination involves the thorough cleaning and disinfection of the equipment after it has been used, especially in environments where exposure to hazardous substances may occur. Proper decontamination helps to remove any contaminants that could compromise the integrity of the equipment or pose health risks to users. It ensures that the equipment remains reliable and can provide adequate protection in future uses.

While the other options may have their importance in the broader context of safety and health, they do not directly pertain to the specific maintenance aspect of respiratory equipment in the same way that decontamination does. Color coding could be related to types of equipment or hazards but is not a maintenance process. Portability addresses the convenience of transporting equipment but again does not reflect a maintenance consideration. Physical fitness tests, although significant for ensuring that workers can safely wear respiratory protection, fall under health assessments rather than maintenance of the equipment itself.