The term TYPE OF LOCOMOTIVE can be answered with two solutions: STEAM and DIESEL. STEAM locomotives are powered by STEAM engines, which use burning coal, wood, or oil to create STEAM that powers the engine. They were the first type of locomotive and were widely used in the 19th and early 20th centuries. DIESEL locomotives are powered by DIESEL engines, which use DIESEL fuel to power the engine. They were developed in the early 20th century and have largely replaced STEAM locomotives in modern times.