Two AC generators of the same capacity are operating in parallel. One with a zero speed droop setting and the other with a 5% speed droop. If its capacity is not exceeded, what will be the characteristic of the unit whose governor has the zero speed droop setting?

Correct Answer: Option A — it will maintain the frequency of the system

A zero speed droop governor maintains a constant RPM regardless of load, acting as an isochronous controller that strictly dictates system frequency, while the drooping unit accommodates load fluctuations according to its droop percentage curve.