The two fundamental formulas for determining total pressure loss are?

The answer is based on the comprehensive definition of total pressure loss in fluid dynamics, particularly in the context of firefighting and water supply systems. The first part of the choice states that the total pressure drop (PDP) is equal to the net pressure (NP) plus the friction loss (FL). This indicates that the total pressure loss experienced in the system accounts for both the available pressure from the pump and any losses due to friction, which is critical for understanding how to maintain effective pressure in a firefighting operation.

The second part of the answer outlines the formula for calculating friction loss, which includes constants and factors like the coefficient (C), the square of the flow rate (Q²), the length of the hose (L), additional losses (AL), and any elevation pressure (EP). This formula highlights the complexities of calculating friction loss, as it factors in both the flow dynamics and physical characteristics of the hose or pipe systems.

Overall, this choice provides a complete and accurate framework for understanding how pressure dynamics work in fireground operations, which is essential for ensuring effective water delivery during firefighting efforts. The inclusion of both components, PDP and FL, along with their derivations, encapsulates the fundamental principles required for assessing and managing pressure losses in