Marine Electrical Systems USCG Question #1003 (Set 34)

If coil 'R1-R2-R3' on the transmitter in figure "C" shown in the illustration is turned 30 degrees clockwise, how will the corresponding coils 'R1-R2-R3' on the receivers (indicators) respond? EL-0092

USCG Exam Illustration EL-0092
USCG Examination Diagram: Illustration EL-0092
Official USCG Answer & Rule Citation

Correct Answer: Option C — torque will cause them to align to the same position

In synchronous data transmission networks governed by IEEE 45, rotating the transmitter rotor induces corresponding stator voltage shifts. Electromagnetic forces create restoring torque in the connected receivers, compelling their rotors to mechanically align precisely with the new angular position transmitted through the multi-phase circuit.

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