What component does Engine 2 use at the fire scene for pumping?

Using a mounted deck gun at the fire scene for pumping is an effective strategy for delivering water over a wider area and at higher elevations. A deck gun is a fixed water cannon that can be operated from the fire engine, allowing the crew to direct a powerful stream of water onto a fire without the need for manual repositioning. This capability is particularly advantageous in situations where a rapid response is critical, as it can help suppress large fires or cool a structure more effectively than traditional handlines.

In contrast, other options serve different functions that may not be optimal for direct pumping operations. A portable water tank is used for the storage of water, primarily in situations where hydrant access is limited, but it does not serve the function of actively pumping water. Similarly, a combi-tool is a hydraulic rescue tool typically utilized for extrication rather than for pumping activities. As for a suction line, while it is essential for drawing water from a static source when the engine is drafting, it is not a component that delivers water directly during fire operations in the same manner as a mounted deck gun. Thus, the deck gun's design and function make it the most suitable choice for firefighting scenarios requiring rapid and effective water application.