Illinois CDL Practice Exam

What scenario would necessitate the use of Stab Braking?

1. During routine acceleration on a straight road

2. In emergency situations when a quick stop is required

3. When approaching a traffic light during rush hour

4. While navigating a sharp turn on a highway exit

The correct answer is: In emergency situations when a quick stop is required

Stab braking is a technique primarily used in emergency situations when a quick stop is required. This method involves applying the brakes firmly to bring the vehicle to a stop and then releasing them to prevent the wheels from locking up, which is crucial for maintaining control. In scenarios where immediate braking is essential, such as avoiding an obstacle or responding to a sudden hazard on the road, stab braking allows the driver to maximize braking efficiency while maintaining steering ability. Other scenarios do not typically require this aggressive braking method. For instance, during routine acceleration on a straight road, smooth and gradual braking is more appropriate. Approaching a traffic light during rush hour usually calls for progressive braking instead of the abrupt force used in stab braking. Similarly, navigating a sharp turn would also benefit from controlled braking rather than the sudden application and release involved in stab braking. This technique is specifically designed for emergency conditions where quick and effective stopping power is critical.