Red Seal Truck and Transport Mechanic Practice Exam

Which system often improves a truck's stability during braking?

1. Adaptive Cruise Control

2. Anti-lock Braking System (ABS)

3. Traction Control System

4. Electronic Brakeforce Distribution

The correct answer is: Anti-lock Braking System (ABS)

The Anti-lock Braking System (ABS) is designed to prevent the wheels from locking up during braking, which can occur when a driver applies pressure to the brakes too hard. When wheels lock, the vehicle can lose traction and stability, leading to potentially dangerous skidding or loss of control, especially in slippery conditions. ABS uses a system of sensors to monitor wheel speed and adjusts brake pressure to each wheel individually. This modulation allows the driver to maintain steering control while braking, helping to stabilize the vehicle. In emergency braking situations, the ability to steer while braking can significantly reduce the risk of accidents. In contrast, while other systems like Adaptive Cruise Control or Traction Control also offer safety benefits, they focus on different aspects of vehicle operation. Adaptive Cruise Control is more about maintaining a set speed and distance from other vehicles, and Traction Control helps prevent wheel slip during acceleration. Electronic Brakeforce Distribution, while improving overall braking performance, does not specifically address wheel lock-up and stability during braking in the same way ABS does.