Which formula is used to determine the pump discharge pressure (PDP) during a resupply operation?

The correct answer is based on understanding how to calculate pump discharge pressure (PDP) in a resupply operation. The formula PDP = Required Intake Pressure + Total Pressure Loss accurately reflects the components involved in determining discharge pressure.

In this context, required intake pressure refers to the minimal pressure needed to draw water from the source. Total pressure loss is the cumulative effect of all friction losses that occur in the system due to the flow of water through hoses, fittings, and other components. This formula combines these two vital factors to provide an accurate representation of the pressure needed to ensure that water can be effectively supplied during operations.

The other formulas provided do not correctly capture the relationship between intake pressure and the necessary adjustments to account for losses within the system, which is critical during resupply operations. Understanding these principles is essential for effectively managing water supply for various needs, ensuring operational efficiency and safety.