To obtain the flow rate from a pump characteristic curve, first calculate the Total Dynamic Head (TDH) by summing the static head, friction losses, and minor losses. Then, locate this TDH value on the y-axis of the pump curve chart. Move horizontally from this point until you intersect the curve, and then drop down vertically to the x-axis. The flow rate at this intersection point is the maximum flow rate the pump can deliver against the calculated TDH, considering the pump's efficiency and operational conditions. Always cross-check with the manufacturer's specifications to ensure accuracy and safe operation.