Why is regular drainage of air tanks important?

Answer: B — To remove accumulated moisture and contaminants

Regular drainage of air tanks is important primarily to remove accumulated moisture and contaminants. In an air brake system, moisture can accumulate in the air tanks due to humidity and condensation. This moisture can lead to several issues, including freezing in cold temperatures, which can block air lines and compromise braking efficiency. Additionally, contaminants such as rust, dirt, and oil can corrode and damage the brake system components over time, leading to potential brake failure. By regularly draining the air tanks, you ensure that the air supplied to the braking system remains clean and dry, which is essential for the reliable and safe operation of air brakes. This maintenance practice helps to prevent damage and extends the life of the braking system, contributing to overall safety while driving.