Council on Law Enforcement Education and Training (CLEET) Law Enforcement Driver Practice Test

Which action should you never perform with ABS brakes?

1. Engage

2. Pump

3. Release

4. Press gradually

The correct answer is: Pump

The action that should never be performed with Anti-lock Braking System (ABS) brakes is pumping the brakes. The design of ABS is intended to prevent the wheels from locking up during hard braking. When you pump the brakes, you are essentially trying to modulate the braking force manually, which can interrupt the system's ability to function properly. Instead, those equipped with ABS should press the brake pedal firmly and maintain that pressure to allow the system to engage effectively, modulating brake pressure automatically to maintain traction and control. In contrast, engaging ABS is the proper initial action when needing to stop, and releasing the brakes can be appropriate in situations where maintaining speed or traction is necessary. Pressing gradually is a strategy used in vehicles without ABS, but with ABS, a firm and steady press is always the recommended approach. Understanding the specific operation of ABS brakes is crucial for effective driving and safety in critical situations.