What type of rotor is used in the split-phase family of single-phase motors?

Correct Answer: Option D — Squirrel-cage

Split-phase motors utilize a squirrel-cage rotor, which consists of conductive bars shorted by end rings. This robust, brushless design is preferred in marine environments per IEEE 45 standards due to its reliability, low maintenance requirements, and ability to withstand the high mechanical stresses associated with frequent motor starts.