CDL Tanker Endorsement Practice Exam

What can side to side surge in a tanker lead to?

1. Increased load stability

2. Roll over

3. Improved fuel efficiency

4. Enhanced braking performance

The correct answer is: Roll over

Side-to-side surge in a tanker refers to the movement of the liquid cargo within the tank, which can occur during maneuvers such as turning, braking, or accelerating. This movement can create a shifting force that impacts the stability of the tanker vehicle. When the liquid moves from one side of the tank to the other, it can cause the center of gravity of the tanker to shift. If the side-to-side movement is significant, it may lead to the tanker overturning, especially if the vehicle is turning sharply or is on an incline. This is why the potential for rollover is a critical concern for tank truck drivers. Maintaining control over the load and managing surge is essential for safe tanker operation to prevent accidents. Drivers are trained to be aware of these dynamics and to take steps to mitigate them, such as reducing speed when cornering and avoiding sudden stops or starts. Understanding the implications of surge emphasizes the importance of proper loading procedures and vehicle handling techniques in preventing rollovers and ensuring overall safety on the road.