Free practice quiz · 8 questions

Respirator Selection and Fit Testing Quiz

Answer every question, then press Check my answers to see your score and an explanation for each one. Study first with the guide: Respirator Selection and Fit Testing for HAZWOPER Work.

1. How often must a worker be fit tested for a tight-fitting respirator?

Answer: At least every 12 months. 1910.134(f)(2) requires fit testing before first use and at least annually.

2. What is the assigned protection factor of a pressure-demand, full-facepiece SCBA?

Answer: 10,000. OSHA assigns an APF of 10,000 to pressure-demand full-facepiece SCBA.

3. A half-mask APR (APF 10) is used against a vapor with a 25 ppm limit. The maximum use concentration is:

Answer: 250 ppm. MUC = APF x exposure limit = 10 x 25 = 250 ppm.

4. Air-purifying respirators may be used when:

Answer: Contaminants are known and below the MUC, with at least 19.5% oxygen. APRs need normal oxygen, known contaminants and concentrations within their limits, and never IDLH.

5. What color is an organic vapor cartridge?

Answer: Black. Organic vapor is black; acid gas is white; ammonia is green; P100 filters are magenta.

6. What must be done every time a tight-fitting respirator is put on?

Answer: A user seal check. Positive and negative pressure seal checks confirm the facepiece is sealed.

7. Is odor an acceptable way to know when to change a gas cartridge?

Answer: No, use an end-of-service-life indicator or a change schedule. OSHA requires an ESLI or a change schedule based on objective information.

8. Before using a respirator for the first time, a worker needs:

Answer: Medical evaluation, fit test and training. 1910.134 requires medical evaluation, fit testing and training before required respirator use.

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