Which option correctly identifies an Air-Purifying Respirator (APR)?

Which option correctly identifies an Air-Purifying Respirator (APR)?

• A. Filtering Facepiece Device
• B. Air-Purifying Respirator
• C. Self-Contained Breathing Apparatus
• D. Airline Respirator

Answer: (B)

An Air-Purifying Respirator is defined by its method: it cleans contaminants from the air you breathe by filtering ambient air, rather than supplying air from a tank or external source. It relies on filters, cartridges, or canisters to remove pollutants and does not provide its own breathing air. This makes the general category name the best match for identifying what an APR is. A Filtering Facepiece Device is actually a type of APR, but the question targets the broad category itself. An SCBA gives air from a cylinder, and an airline respirator uses air from an external supply, neither of which are APRs.

An Air-Purifying Respirator is defined by its method: it cleans contaminants from the air you breathe by filtering ambient air, rather than supplying air from a tank or external source. It relies on filters, cartridges, or canisters to remove pollutants and does not provide its own breathing air. This makes the general category name the best match for identifying what an APR is. A Filtering Facepiece Device is actually a type of APR, but the question targets the broad category itself. An SCBA gives air from a cylinder, and an airline respirator uses air from an external supply, neither of which are APRs.