Which statement correctly describes air purifying respirators?

Which statement correctly describes air purifying respirators?

• A. Air purifying respirators supply a continuous external air source
• B. Air purifying respirators filter air only from the surrounding environment
• C. Air purifying respirators only filter contaminated air around you
• D. Air purifying respirators are not used for pesticide handling

Answer: (C)

Air purifying respirators remove contaminants from the air you breathe by filtering the ambient air around you. They do not provide a separate, continuous external air supply; instead, clean air is drawn through filters as you inhale. Because of this, the most accurate description is that they filter contaminated air around you. The other statements miss the core function: they don’t supply external air (that would be supplied-air respirators), and they filter the air from the environment rather than generating air themselves. They can be used for pesticide handling when the surrounding air has contaminants and sufficient oxygen is present.

Air purifying respirators remove contaminants from the air you breathe by filtering the ambient air around you. They do not provide a separate, continuous external air supply; instead, clean air is drawn through filters as you inhale. Because of this, the most accurate description is that they filter contaminated air around you.

The other statements miss the core function: they don’t supply external air (that would be supplied-air respirators), and they filter the air from the environment rather than generating air themselves. They can be used for pesticide handling when the surrounding air has contaminants and sufficient oxygen is present.