In a 60 Hz AC system, what is the duration in seconds for one complete cycle?

Correct Answer: Option D — .016 of a second

Frequency in alternating current represents cycles per second. The period ($T$) for one complete cycle is the reciprocal of frequency ($f$). For a 60 Hz system, $T = 1 / 60$, which equals approximately 0.0166 seconds. Under 46 CFR Subchapter J and IEEE 45 standards, understanding cycle duration is vital for evaluating timing circuits and electrical transients.