Which statement is a disadvantage of Air Purifying Respirators?

Which statement is a disadvantage of Air Purifying Respirators?

• A. Cannot be worn in an IDLH area
• B. Can be worn in an oxygen-deficient area
• C. Has built-in air supply
• D. Is inexpensive to operate

Answer: (A)

Air-purifying respirators work by filtering contaminants from the surrounding air, so they depend on breathable ambient air and do not supply oxygen. In environments that are immediately dangerous to life and health (IDLH) or where the air is oxygen-deficient, these respirators cannot protect you because you’re not getting a supplied air source. That limitation is why the statement about not being able to be used in an IDLH area is the correct disadvantage. Notes on the other options: APRs do not provide a built-in air supply—that characteristic belongs to supplied-air systems or PAPRs with their own air source. They also cannot be used in oxygen-deficient atmospheres, so the idea that they can be worn there is not accurate. And while operating costs vary, the notion that APRs are inexpensive to operate isn’t a defining drawback; the key limitation is the lack of independent air supply in dangerous atmospheres.

Air-purifying respirators work by filtering contaminants from the surrounding air, so they depend on breathable ambient air and do not supply oxygen. In environments that are immediately dangerous to life and health (IDLH) or where the air is oxygen-deficient, these respirators cannot protect you because you’re not getting a supplied air source. That limitation is why the statement about not being able to be used in an IDLH area is the correct disadvantage.

Notes on the other options: APRs do not provide a built-in air supply—that characteristic belongs to supplied-air systems or PAPRs with their own air source. They also cannot be used in oxygen-deficient atmospheres, so the idea that they can be worn there is not accurate. And while operating costs vary, the notion that APRs are inexpensive to operate isn’t a defining drawback; the key limitation is the lack of independent air supply in dangerous atmospheres.