When is a respirator fit test required and how often must it be repeated?

• A. Required when selecting a respirator or changing model; repeated annually or after significant facial changes.
• B. Required every two years, regardless of changes.
• C. Required when selecting a respirator or changing model; repeated annually or after significant facial changes.
• D. Not required for any respirator.

Answer: (C)

Respirator fit testing ensures the chosen respirator seals properly to the wearer's face. It is required when you first select a respirator or switch to a different model or size, because different models can seal differently and a prior test can’t guarantee a good seal for a new configuration. After that initial test, you must have the fit tested at least annually, and again if there are significant facial changes that could affect the seal (such as noticeable weight changes, dental work, facial scarring, or other changes to facial features). This keeps protection consistent over time, separate from the daily user seal checks done before each use.