Which statement correctly describes air purifying respirators?

Which statement correctly describes air purifying respirators?

• A. They filter contaminants from ambient air
• B. They provide external clean air
• C. They chemically neutralize toxins
• D. They provide oxygen

Answer: (A)

Air purifying respirators work by removing contaminants from the air you breathe in the surrounding environment. They use filters or cartridges to capture particles or adsorb/absorb certain gases and vapors, cleaning the air before it reaches your lungs. They rely on the oxygen already present in ambient air and do not supply oxygen themselves, so they aren’t suitable for oxygen-deficient atmospheres. They also don’t chemically neutralize toxins; the contaminants are removed through filtration or adsorption, not via a chemical reaction that neutralizes them. That’s why describing them as filtering contaminants from ambient air best captures how they function.

Air purifying respirators work by removing contaminants from the air you breathe in the surrounding environment. They use filters or cartridges to capture particles or adsorb/absorb certain gases and vapors, cleaning the air before it reaches your lungs. They rely on the oxygen already present in ambient air and do not supply oxygen themselves, so they aren’t suitable for oxygen-deficient atmospheres. They also don’t chemically neutralize toxins; the contaminants are removed through filtration or adsorption, not via a chemical reaction that neutralizes them. That’s why describing them as filtering contaminants from ambient air best captures how they function.