What can you do to prevent the brakes from being applied during backing of MEP-12 generator?

Blocking the surge brakes is the correct choice because it directly addresses the mechanism that could cause the brakes to engage while the generator is being backed up. Surge brakes are designed to activate when the towing vehicle slows down, allowing the trailer’s brakes to engage automatically. By blocking these brakes, you ensure that they do not unintentionally apply when backing up, facilitating smoother movement and reducing the risk of the generator being halted abruptly.

Other options suggest alternative actions, such as increasing power or changing braking systems, which do not directly prevent the surge brakes from engaging. Additionally, disconnecting the battery might impact the overall functionality of the system, not specifically addressing the issue of brake application during backing. Thus, blocking the surge brakes is the most effective and relevant action to take in this scenario.