Assigned Protection Factor defines:

Assigned Protection Factor defines:

• A. Quality and cost of maintenance for a respirator
• B. The level of protection provided by a respirator
• C. The number of workers using a respirator in a shift
• D. The expected lifespan of a respirator in months

Answer: (B)

Assigned Protection Factor represents the level of protection a respirator provides. It’s a numerical value that reflects how much a properly functioning respirator reduces a worker’s exposure, effectively the ratio of contaminant concentration outside the mask to the concentration inside the mask. This helps determine the appropriate respirator for a given hazard so that inhaled exposure stays below the allowed limits. For example, an APF of 10 means the air inside the respirator is expected to be about one-tenth of the outside concentration. The other factors listed—maintenance quality or cost, how many workers are using a respirator, or the respirator’s lifespan—do not describe the protection level.

Assigned Protection Factor represents the level of protection a respirator provides. It’s a numerical value that reflects how much a properly functioning respirator reduces a worker’s exposure, effectively the ratio of contaminant concentration outside the mask to the concentration inside the mask. This helps determine the appropriate respirator for a given hazard so that inhaled exposure stays below the allowed limits. For example, an APF of 10 means the air inside the respirator is expected to be about one-tenth of the outside concentration. The other factors listed—maintenance quality or cost, how many workers are using a respirator, or the respirator’s lifespan—do not describe the protection level.