By what year did steam engines disappear from use in fire fighting?

The correct answer is 1925, which reflects a significant transition in firefighting technology during the early 20th century. By this time, advancements in internal combustion engines led to the development of more efficient and reliable motorized fire trucks, which gradually replaced steam-powered fire engines.

The steam engine was a crucial innovation in firefighting during the 19th century, allowing for more effective water transport and pressure. However, as technology progressed, the need for steam engines diminished in favor of these new motorized vehicles that could respond more quickly and with greater operational flexibility.

The timeline of these advancements highlights how the firefighting industry adapted to technological changes to enhance efficiency and effectiveness in emergency response. In the context of the other options listed, the evidence shows that by 1925, steam engines were effectively phased out of active service in firefighting, marking the end of their era. This transition illustrates broader industrial shifts occurring at that time, paving the way for the modern firefighting methods we recognize today.