Which of the following is NOT a type of respirator test?

The choice indicating "flow test" as not being a type of respirator test is correct because respirator fit testing typically involves assessing how well the respirator forms a seal on the wearer’s face and how it functions under normal conditions of use. The various types of respirator tests focus on the integrity of the seal and the ability of the respirator to maintain an effective barrier against contaminants.

Seal checks are a fundamental procedure where the wearer ensures that the respirator fits properly, often through a simple inhalation or exhalation to feel for any leaks. Negative pressure tests and positive pressure tests are specific methodologies used to assess respirators’ performance against potential leaks. Negative pressure tests verify that the respirator creates a vacuum when inhaled, indicating a good seal, while positive pressure tests check for leaks by allowing air to flow out when the respirator is pressurized.

In contrast, a flow test is not recognized as a standard respirator test type within the context of respirator fit testing and use in occupational safety standards. Therefore, identifying flow test as not fitting into the recognized categories of respirator tests reflects a clear understanding of the essential methods used to ensure respirator effectiveness and worker safety in environments where asbestos or other hazardous materials are present.