Georgia Commercial Driver License Practice Test

What factors contribute to a tank vehicle's danger level?

1. Surges, shifting, and a low center of gravity

2. Surges, shifting, and a high center of gravity

3. Weight, length, and speed

4. The trailer load and weather conditions

The correct answer is: Surges, shifting, and a high center of gravity

The danger level of a tank vehicle is significantly influenced by factors such as surges, shifting, and a high center of gravity. When a tank vehicle is in motion, the liquid inside can create surges, which can cause the vehicle to handle unpredictably. These surges occur because liquids are non-compressible and will shift in response to acceleration, deceleration, and cornering, potentially affecting the stability of the vehicle. A high center of gravity is another critical factor that contributes to the danger level. A tank vehicle typically has a higher center of gravity than other vehicle types, which increases the risk of rollover, especially during turns or abrupt maneuvers. This heightened risk due to the high center of gravity makes it essential for drivers to exercise caution and adjust their driving techniques accordingly. While factors like weight, length, speed, the trailer load, and weather conditions can contribute to overall vehicle handling and safety, they do not specifically address the unique dynamics involved with tank vehicles that are heavily influenced by the properties of the liquid they transport. Therefore, surges and shifting in conjunction with a high center of gravity are crucial considerations in assessing the danger level associated with tank vehicles.