What do commercial fuel types typically begin with?

Commercial fuel types typically begin with "Jet" because this prefix identifies the fuel as specifically designed for jet engines. Jet fuel is a critical component in the aviation industry, and the nomenclature reflects its intended application.

In the context of aviation fuel, "Jet A" and "Jet A-1" are standard types of jet fuel used in commercial aviation, both of which are defined by their specifications and suitable for turbine engines. This designation not only helps in identifying the type of fuel but also ensures that pilots and ground crew can easily differentiate it from other types of aviation fuels, like piston engine fuels, which use different terminologies.

The other options do not correctly refer to the common naming convention for commercial jet fuel. For instance, while “JP” refers to military jet propellants, “F” and “AV” are not standard terms starting for commercial fuels. Recognizing these distinctions is fundamental for safety and proper fueling operations in aviation.