Which class of intrinsically safe equipment pertains to gases and vapors such as gasoline?

The correct answer, Class I, pertains specifically to equipment and devices that are designed to be safe for use in environments where flammable gases and vapors may be present, such as those associated with gasoline. Class I covers hazardous locations where ignitable quantities of gases, vapors, or liquids are present in the air under normal operating conditions. This classification is crucial in preventing potential ignition sources that could lead to explosions or fires in environments such as fuel storage areas or industrial locations dealing with volatile substances.

Class II focuses on locations that have combustible dust, which would not be applicable when discussing gases and vapors. Class III is related to areas where there are easily ignitable fibers or flyings, primarily involving materials that are not gas or vapor-based. Class IV is not a recognized category under the standard hazardous location classifications and would not apply. Therefore, understanding the specific classifications helps ensure that the correct type of intrinsically safe equipment is utilized in environments with flammable gases like gasoline, enhancing safety and compliance with regulations.