What are the two main types of respirators used in asbestos abatement?

The correct choice identifies the two primary categories of respirators used in asbestos abatement as Air-Purifying and Atmosphere-Supplying Respirators. Air-Purifying Respirators work by filtering out harmful particles, including asbestos fibers, from the air before they are inhaled. These respirators can use various types of filters or cartridges tailored to trap specific contaminants, making them essential for environments where airborne hazards exist at manageable levels.

On the other hand, Atmosphere-Supplying Respirators provide a supply of clean air from an external source. This type of respirator is necessary in situations where the air quality is so compromised that air-purifying methods would not suffice, or concentrations of asbestos pose a high risk of exposure.

The other choices presented are valid types or categories of respirators but do not specifically denote the main categories used in the context of asbestos abatement. For instance, while disposable and reusable respirators relate to the usage type, they don’t encompass the functional classification. Similarly, full-face and half-face respirators describe the design and coverage but not the operational function in terms of air supply. Filtered and non-filtered respirators focus narrowly on the method of air treatment rather than the broader functional classifications that are crucial when dealing