An indicating pilot light in a control circuit signals which of the following?

An indicating pilot light in a control circuit serves as a visual signal regarding the state of an electrical circuit and its load. When a pilot light is activated, it can indicate whether a load is energized, de-energized, or both, depending on how the circuit is wired and designed.

In many control systems, the pilot light is used to provide feedback on the operation of the circuit. For instance, it might illuminate when the load is energized, indicating that power is flowing and the connected equipment is operational. Conversely, in some configurations, the pilot light can also indicate that a load has been de-energized, perhaps by shining in a different color or turning off entirely when the load is not receiving power.

Thus, the correct answer signifies that the indicating pilot light can signal either of these two states, providing important information about the circuit's operation to the user or technician. This flexibility is crucial for diagnostics and monitoring of electrical systems. The other choices fail to account for the potential for the pilot to indicate both energized and de-energized conditions, which limits the understanding of its function in control circuits.