Marine Electrical Systems USCG Question #22 (Set 1)

As shown in figures "A", "B", "C", and "D" of the illustration, what is the usual means by which the rotation direction of the motor is reversed? Illustration EL-0207

USCG Exam Illustration EL-0207
USCG Examination Diagram: Illustration EL-0207
Official USCG Answer & Rule Citation

Correct Answer: Option C — Interchanging leads T5 and T8

Reversing the direction of rotation in a split-phase induction motor requires changing the phase relationship between the main and auxiliary windings. Interchanging the leads of the auxiliary winding (T5 and T8) reverses the polarity of the starting field relative to the main field, effectively reversing the motor's rotation.

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