How often should air tanks be drained?

Answer: B — At the end of every working day

Air tanks in a vehicle's air brake system should be drained at the end of every working day to prevent moisture accumulation. Moisture can enter the air brake system during normal operations and condense in the air tanks, especially when there are temperature fluctuations. By draining the air tanks daily, you ensure that any accumulated water is removed, which helps maintain the efficiency and reliability of the brake system. This practice reduces the risk of freezing during colder months and prevents potential corrosion or malfunctioning of the air brake components, contributing to overall safety. Regular drainage is a critical maintenance step that drivers and fleet operators should prioritize.