Michigan Commercial Driver's License (CDL) Practice Exam

What does stab braking involve?

1. Quickly applying brakes then releasing them

2. Gradually applying the brakes to avoid locking up

3. Keeping brakes engaged during turns

4. Braking with both feet for maximum pressure

The correct answer is: Quickly applying brakes then releasing them

Stab braking involves quickly applying the brakes fully and then releasing them in a controlled manner. This technique is used primarily in emergency situations to avoid skidding or losing control of the vehicle. When a driver stabs the brakes, the goal is to achieve maximum stopping power initially and then release the brakes to regain traction, especially in a situation where the wheels may lock up. This approach is particularly effective on slippery surfaces, as it helps maintain the vehicle's control and allows for a brief period of deceleration without the tires losing grip entirely. Other methods, such as gradually applying the brakes, focus on maintaining traction throughout the braking process, which is not the goal of stab braking. Additionally, techniques like keeping brakes engaged during turns or using both feet for maximum pressure do not align with how stab braking is defined and applied. Thus, stab braking is characterized by that quick application and release cycle to enhance control during emergency braking scenarios.