CDL Tanker Endorsement Practice Exam

What is the primary concern when loading liquid in a tanker regarding surge?

1. Fuel type selection

2. Balance and stability of the tanker

3. Temperature control of the liquid

4. Ventilation in the cargo area

The correct answer is: Balance and stability of the tanker

The primary concern when loading liquid in a tanker regarding surge is the balance and stability of the tanker. Liquid cargo, especially when in motion, can shift within the tank due to acceleration, braking, or turns. This shifting, known as surge or slosh, can create significant dynamic forces that affect the vehicle's center of gravity and stability. An unbalanced load can cause the tanker to tip over or lead to loss of control, especially in adverse driving conditions. Proper loading practices, including allowing for expansion and ensuring the liquid is distributed evenly, are vital to maintaining stability. Additionally, understanding the properties of the liquid and the design of the tanker can help in mitigating these concerns. While considerations like fuel type, temperature, and ventilation are important in their own contexts, they are secondary to the fundamental need to ensure that the tanker remains balanced and stable during transport to prevent accidents and ensure safety.