USCG Exam PracticeElectrical fundamentals — DC/AC, motors, distribution
AC is the standard for shipboard power generation and distribution primarily because:
- A. AC motors require brushes and commutators, making them easier to maintain than DC machines.
- ✓ AC voltage can be raised or lowered by transformers, allowing efficient transmission and simple motor design.Correct
- C. AC flows in one direction at a steady value, simplifying circuit analysis.
- D. AC eliminates the effects of inductance and capacitance in shipboard loads.
Why B is correct
NEETS Mod. 2 §1-1 states that AC is the shipboard standard because its voltage is easily raised or lowered by transformers, allowing efficient transmission and simple motor design. DC flows in one direction at a steady value, not AC, and AC's drawback is that inductance and capacitance must be accounted for.
Cited:NEETS Mod. 2 §1-1