New York State Asbestos Investigator Practice Exam

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What is the APF for a Powered Air-Purifying Respirator (PAPR)?

  1. 500

  2. 1000

  3. 100

  4. 10000

The correct answer is: 1000

The Assigned Protection Factor (APF) for a Powered Air-Purifying Respirator (PAPR) is set at 1000. This means that, when properly fitted and used in accordance with manufacturer instructions, a PAPR can reduce the airborne concentration of contaminants by a factor of 1000 relative to the concentration in the environment. This high level of protection is attributed to the powered mechanism of the respirator, which actively circulates air through filters before delivering it to the user. This effective filtration process allows individuals to work safely in environments where they could be exposed to hazardous airborne contaminants, including asbestos fibers. Setting the APF at 1000 reflects the robust design and functionality of PAPRs, making them suitable for use in scenarios with significant exposure hazards, while ensuring that safety standards are met to protect the user effectively.