A qualitative fit test is a pass/fail test that relies on the employee's response to a test agent.
All respirators that rely on a mask-to-face seal must be fit tested to validate the seal is air-tight. This fit test must be performed:
prior to first issue,
when there's a change in the model, style or size of respirator used,
when there's a physical facial change in the person wearing the mask, and
at least annually
F..