Question 1374 Deck General

The correct answer is B) flash point. The flash point of a substance is the lowest temperature at which the substance can vaporize to form an ignitable mixture in air. This is an important indicator of the tendency of a Grade "B" product (which refers to combustible liquids with a flash point between 100°F and 140°F) to vaporize and potentially ignite. The higher the flash point, the less likely the substance is to vaporize and form a flammable mixture. The other options are not directly related to the vaporization tendency of a Grade "B" product. Ignition temperature refers to the minimum temperature required to ignite the substance, convection index is a measure of heat transfer, and flammable range is the range of concentrations in air where the substance can ignite.