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 D — increase to 61 Hz
AC generator frequency is directly proportional to rotational speed (f = P * RPM / 120). An increase in prime mover speed from 1800 RPM to 1830 RPM proportionally raises the output frequency from 60 Hz to 61 Hz.
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