CDL Tanker Endorsement Practice Exam

When operating a smooth bore tanker, maintaining caution while stopping is particularly crucial due to the unique characteristics of the liquid being transported. Smooth bore tankers do not have baffles that can help control the movement of liquid within the tank; as a result, when the vehicle comes to a sudden stop, the liquid can surge forward with significant force. This forward momentum can lead to a shift in the tanker’s center of gravity and may cause the vehicle to become unstable. If the truck becomes too unstable, it can tip over, resulting in a rollover.

This potential for rollover is heightened during sudden or abrupt stops, especially when the driver is unable to manage the weight distribution effectively due to the liquid's behavior. Thus, being cautious while stopping helps to mitigate the risk of rolling over, which is a serious safety concern in tanker operations. Understanding these dynamics is critical for safe and effective handling of tanker vehicles.