Which of the following is true regarding control transformer output voltage?

The answer is correct because control transformers are designed to provide low voltage control circuits from higher voltage sources, and their output voltage can indeed be less than the input voltage depending on how they are connected. This is particularly relevant in scenarios where the transformer is tapped or has multiple secondary winding options that can be configured to achieve different output voltages. The transformer's winding ratios determine the output voltage, which can be stepped down through appropriate connections.

This concept aligns with the operational characteristics of transformers, where they step down (or step up) voltage based on the turns ratio of the windings. In many applications, control transformers are utilized to convert a higher primary voltage into a lower secondary voltage suitable for control circuits, and thus the output can certainly be adjusted to be less than the incoming voltage based on the specific wiring setup.