What level of tire slip is maintained by an anti-lock brake system?

• A. 0-5%
• B. 5-10%
• C. 10-20%
• D. 20-30%

Answer: (C)

An anti-lock brake system (ABS) is designed to prevent wheel lockup during hard braking by modulating brake pressure. The system uses sensors to monitor wheel speed and applies braking force in a way that maximizes tire grip with the road surface while avoiding slippage that could lead to loss of control.

The correct response indicates that ABS typically maintains a tire slip level of 10-20%. This level of slip allows the tires to maintain sufficient traction while also ensuring the vehicle does not skid. At this slip percentage, the tires are still rolling but are on the verge of losing grip, which is optimal for effective braking without locking the wheels.

Overall, the 10-20% slip range allows for the best combination of stopping power and vehicle control, ensuring that drivers can steer and maintain directional control during emergency braking scenarios.