CDL Tanker Endorsement Practice Exam

What kind of surge can liquid in a tank with baffles experience?

1. Front to back surge

2. Side to side surge

3. Upward surge

4. Variable surge

The correct answer is: Side to side surge

In a tank equipped with baffles, the liquid can experience side-to-side surge. Baffles are internal structures designed to reduce the movement of the liquid during maneuvering and to help control the sloshing effect. However, while baffles can limit the front-to-back motion of the liquid, they do not entirely eliminate the potential for side-to-side movement. This lateral motion can occur as the vehicle turns or maneuvers, causing the liquid to shift against the walls of the tank. Understanding the behavior of liquid within baffles is crucial for tank truck operators, as it helps in anticipating how the load will shift during different driving conditions. The ability to manage the risks associated with this type of surge is vital for maintaining control of the vehicle and ensuring safe transportation of liquid cargo.