In terms of voltage potential and current sources, how are shunt wound, series wound, and compound wound DC motors designed to operate?

Correct Answer: Option B — constant potential, variable current DC sources

Marine DC motors, including shunt, series, and compound wound types governed by Title 46 CFR Subchapter J and IEEE 45, are engineered for constant potential (constant voltage) DC distribution buses where current draw varies dynamically according to the mechanical load applied to the motor shaft.