What preventative measure should be taken to ensure the storage tank operates effectively?

Answer: B — Regularly drain moisture

Regularly draining moisture from the storage tank is essential for ensuring effective operation. Moisture can accumulate in the air brake system and lead to various problems such as corrosion, reduced brake efficiency, and freezing in cold temperatures. By periodically removing the moisture, you help maintain the integrity of the entire air system and prevent issues that could compromise safety and functionality. This practice is particularly crucial in environments where humidity levels may be high, or in colder climates where moisture can freeze, resulting in blockages and brake failures. Keeping the air supply dry extends the life of brake components and enhances overall performance.