What can an indicating pilot light be used to indicate in a control circuit?

• A. Only power status
• B. The presence of current only
• C. Either power status or current presence
• D. The operational status of the motor only

Answer: (C)

An indicating pilot light serves as a visual cue in a control circuit, often providing valuable information about the state of the system it is monitoring. Specifically, such a light can indicate both the power status and the presence of current at different points in the circuit.

When the pilot light is illuminated, it typically signifies that power is being supplied to the circuit, thus indicating that the system is energized. This is crucial for operators or technicians to know whether the circuit is live and operational. Furthermore, the pilot light can also show when current is flowing through a particular part of the circuit, which may not only be tied to the initial power on state but can also indicate if specific components, like motors or other devices, are receiving current for operation.

This dual functionality of indicating power status and current presence is what makes the indicating pilot light versatile in control circuits, allowing for quick visual checks without needing to measure electrical parameters with additional instruments.