What could happen if water accumulates in the air brake system?

Water accumulation in the air brake system can lead to freezing in cold weather, which may cause the brakes to fail. When moisture enters the air brake lines, it can freeze during low temperatures, forming ice that obstructs airflow and the proper functioning of the brake system. This ice can block the air supply or prevent the brake components from engaging properly, leading to a loss of braking power and potentially dangerous situations while driving.

Effective air brake systems rely on dry, pressurized air to function correctly. Regular maintenance, including draining the air tanks to remove accumulated moisture, is crucial to prevent such issues. The other options do not accurately describe the consequences of water in the air brake system or are misleading regarding the operation and maintenance of air brakes.