What are the maximum DC loads with one generator operating while on the ground?

The correct choice indicates that the maximum DC load with one generator operating while on the ground is 280 Amps. This figure is significant because it reflects the operational limits of the electrical system in the aircraft. Understanding these limits is crucial during ground operations, particularly when managing power distribution to avoid overloading the electrical system.

The reason the 280 Amps value is established as the maximum is based on the technical specifications of the generator and the overall design of the aircraft's electrical system. This limit helps to ensure that the generator operates within a safe range, preventing overheating and potential damage. It is also aligned with system capacity and efficiency, ensuring that all essential systems have adequate power without risking generator failure or electrical problems.

In contrast, higher figures like 400 Amps, 500 Amps, or 750 Amps exceed the design limits of the generator, which could lead to inadequate performance or failure of the electrical system during crucial phases of operation. It's important for flight crews and maintenance personnel to be aware of these specifications to ensure proper load management during ground operations.