CDL Tanker Endorsement Practice Exam

What is a potential risk when navigating a downhill slope with a tanker?

1. The tanker may slow down too much

2. The tank could rupture

3. It could gain excessive speed

4. The load may shift

The correct answer is: It could gain excessive speed

Navigating a downhill slope with a tanker presents various risks, and one of the most significant concerns is the potential for the vehicle to gain excessive speed. When a tanker is on a downhill slope, the gravitational pull can accelerate the vehicle beyond a safe speed, particularly if the driver is not managing the brakes effectively or anticipating the descent correctly. As the tanker descends, its weight and liquid load can create added momentum, making it more challenging to control. This situation can lead to brake overheating or failure if the driver relies too heavily on the brakes instead of using a combination of engine braking and other techniques to manage speed. It’s critical for drivers to be aware of the weight of their load, the terrain, and to apply proper braking techniques to maintain safe speeds while descending. Maintaining control of the vehicle and avoiding excessive speed is essential for the safety of the driver, the vehicle, and other road users, which underscores the importance of careful navigation on downhill slopes.