What type of equipment is primarily used with an MST?

The shut-off nozzle is primarily used with an MST, or Multi-Use Strainer Tank. The MST is designed to facilitate water delivery in various firefighting scenarios, particularly when dealing with static water sources such as ponds or swimming pools. The shut-off nozzle is crucial as it allows firefighters to control the flow of water, ensuring that it can be effectively directed where it is needed most during an operation. This ability to manage the water supply is essential for maintaining pressure and flow rates for firefighting efforts.

Other equipment options, while important in their own contexts, do not specifically serve the primary function of controlling water flow in conjunction with the MST. Rescue tools are utilized for extrications, hydrant adapters serve to connect hoses to water supply systems, and fire hose reels are typically used for quick access to hose lines rather than for specific functions related to the MST. Thus, the shut-off nozzle stands out as the most relevant equipment for this application.