An AC generator produces 60 Hz at 1800 RPM. If the generator speed is increased to 1830 RPM, what will happen to the frequency in Hz?
Official USCG Answer & Rule Citation
Correct Answer: Option C — increase to 61 Hz
Generator frequency is directly proportional to rotor speed in revolutions per minute. Increasing speed from 1800 to 1830 RPM proportionally raises the output frequency to 61 Hz. IEEE 45 and 46 CFR Subchapter J require strict governor control to maintain stable frequency during shipboard operations.
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