Which of the following is NOT one of the three fire extinguisher tests?

The correct answer points to the fact that the Dry Chemical Test is not one of the designated tests typically used to evaluate fire extinguishers. The primary purpose of fire extinguisher testing is to ensure that they can effectively suppress fires when needed, and this is done through various standardized tests.

The Wood Crib Test, Excelsior Test, and Wood Panel Test are recognized methods for assessing the performance of fire extinguishers, particularly in terms of their ability to put out specific types of fires. These tests involve using materials that represent the actual conditions under which extinguishers would be used, allowing for a realistic evaluation of their efficacy.

In contrast, the Dry Chemical Test generally refers to the testing of a specific type of extinguishing agent, rather than a distinct performance test for extinguishers. This concept highlights the difference between testing the extinguishing agents themselves and rigorous testing methodologies applied to the extinguishers as a whole.