What is the dual operation capability of a starter generator?

The dual operation capability of a starter generator is that it can function both as a starter and as a generator. This versatility is essential in various aviation applications, as it allows for efficient power management during the starting process and continued power generation during normal operations.

When the aircraft's engine is not running, the starter generator operates like a starter motor, drawing electrical power from the aircraft's battery to initiate the engine's start sequence. Once the engine is operational, the starter generator switches to generator mode, supplying electrical power to the aircraft systems and recharging the battery. This dual functionality makes it an integral component of modern aircraft electrical systems, providing both the initial power required to start the engine and the ongoing power needed during flight.

In contrast, the other choices describe limitations that do not reflect the true capabilities of the starter generator. Some incorrectly assert that it can only perform one function, either as a starter or a generator, while one option inaccurately focuses solely on voltage regulation, which is not the primary function of the starter generator.