Marine Electrical Systems USCG Question #298 (Set 10)

Which of the listed figures in the illustration represents a transformer configured for single voltage primary and a tapped secondary? Illustration EL-0055

USCG Exam Illustration EL-0055
USCG Examination Diagram: Illustration EL-0055
Official USCG Answer & Rule Citation

Correct Answer: Option B — D

Transformers with intermediate connection points along the secondary winding provide variable output voltage options. Per IEEE 45 drawing standards, figure "D" correctly represents a transformer configured with a single primary voltage winding and a multi-tapped secondary arrangement.

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