What test needs to be done prior to using a respirator?

The fit test is crucial before using a respirator because it ensures that the respirator forms a proper seal around the user's face. This seal is vital for the respirator to function effectively, as it protects the user from inhaling harmful substances in the environment. A proper fit minimizes the risk of air leaks, which can lead to inadequate protection.

There are two main types of fit tests: qualitative, which relies on the user's sensory response to a test agent, and quantitative, which uses specialized equipment to measure the effectiveness of the seal. Both types are essential steps in confirming that a respirator is suitable for the individual user.

While the other options—calibration tests, endurance tests, and visual inspections—are important aspects of respiratory protection programs, they serve different purposes. Calibration tests ensure that the measuring instruments are accurate, endurance tests assess the user's ability to wear the respirator for extended periods, and visual inspections help in identifying any visible defects. However, none of these can replace the necessity of assessing the fit of the respirator specifically for the individual who will be using it.