Why is it essential to drain air tanks regularly?

Answer: C — To remove moisture and prevent brake malfunction

Draining air tanks regularly is crucial to remove moisture and prevent brake malfunction. In an air brake system, moisture can accumulate in the air storage tanks due to condensation, particularly in humid conditions. This moisture can lead to a range of issues, including corroding the internal components of the air brake system, freezing in cold weather, and causing brake linings to become less effective. If moisture builds up, it can also result in the formation of ice that may block air lines, leading to brake failure. Thus, regular drainage helps maintain the integrity and functionality of the brake system, ensuring safe operation of the vehicle.