What is the function of the autotransformers used with autotransformer starters used on some large AC motors?

Correct Answer: Option B — provide reduced voltage for starting

Autotransformer starters reduce the voltage applied to large AC motor terminals during the initial startup phase. By limiting the inrush current, the autotransformer prevents excessive voltage dips on the ship's service bus and reduces mechanical stress on the motor and driven equipment, transitioning to full voltage once the motor accelerates.