What is the calculated discharge pressure (DP) for Engine 8 when using 2.5" hose?

The calculated discharge pressure of 200 psi for Engine 8 when using 2.5" hose can be supported by understanding the principles of fire hose dynamics and the operational requirements for the engine. When determining the discharge pressure, factors such as the flow rate needed for firefighting operations, friction loss in the hose, and elevation changes must be taken into account.

In typical fire engine operations, a discharge pressure of around 200 psi when using 2.5" hose is often a standard value utilized for effective firefighting tactics. This figure ensures an adequate flow rate to combat structural fires while accommodating friction losses over distance and maintaining adequate nozzle pressures for effective stream delivery.

Other choices represent values that would either lead to insufficient flow or excessive pressure that could unnecessarily stress the system, potentially leading to safety issues or operational inefficiencies. Hence, the chosen discharge pressure aligns well with the established guidelines and practices for using 2.5" hose in typical fire service applications.