How often should air tanks be drained of moisture?

Answer: B — Daily or before long trips

Air tanks should be drained of moisture daily or before long trips due to the nature of how air brakes function. In air brake systems, moisture can accumulate in the air tanks due to condensation from the compressed air. If this moisture is not regularly drained, it can freeze in cold weather, leading to brake system failures or reduced braking efficiency. Daily draining or draining before long trips ensures that the air tanks remain free of moisture, which is crucial for maintaining optimal brake performance and safety. Regular maintenance like this helps extend the lifespan of the brake system components and prevents costly repairs caused by corrosion or freezing of water in the air lines. By adhering to this practice, drivers can ensure that their air brake system will operate reliably under various conditions.