Practice question

EPA Level C protection is appropriate when:

  1. The atmosphere is unknown and oxygen-deficient
  2. The contaminant is identified, its concentration is known and within APR limits, and an air-purifying respirator with the correct cartridge is adequate
  3. The greatest possible vapor hazard exists
  4. There is no chemical hazard of any kind

Answer: B — The contaminant is identified, its concentration is known and within APR limits, and an air-purifying respirator with the correct cartridge is adequate

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