What condition can result from a failure of the air dryer in an air brake system?

Answer: B — Moisture accumulation leading to component damage

A failure of the air dryer in an air brake system can lead to moisture accumulation, which can cause significant damage to various components of the brake system. The air dryer’s primary function is to remove moisture and contaminants from the compressed air before it reaches the brake system. When the air dryer fails, moisture can enter the system, potentially leading to corrosion and wear on parts such as the brake valves, chambers, and the air lines. Excess moisture can also lead to issues like freezing in colder temperatures, which can affect the system's performance and reliability. Proper functioning of the air dryer is crucial for maintaining the integrity and efficiency of the air brake system.