What is NOT a component evaluated during an air pressure test for fuel cells?

During an air pressure test for fuel cells, the focus is primarily on the structural integrity and functionality of the fuel cell materials. Evaluating the presence of leaks is crucial, as any leaks could compromise the fuel cell's ability to hold fuel pressure and operate effectively. Checking for the integrity of the fuel cell material is also essential because it ensures that the cell can withstand operational stresses without failure. Pressure stability over time is significant because it helps to confirm that the fuel cell can maintain the required pressure without any fluctuations that may indicate potential issues.

Temperature changes, however, are not typically a direct component evaluated during an air pressure test for fuel cells. While temperature can affect pressure readings and fuel cell performance in general, it is not a primary focus of the test itself. The test mainly assesses whether the fuel cell can maintain pressure without leaks or structural failures under the specific conditions it's designed for.