Which one of the following is NOT included in a typical anti-lock brake system?

In a typical anti-lock brake system (ABS), the components work together to prevent wheel lock-up during braking, allowing for better steering control and stability. The correct response identifies "bead" as not being a part of the anti-lock brake system, as it does not serve a function related to the system's operation.

The wheel speed sensors are critical components that monitor the speed of each wheel, sending this information to the control module. This data helps determine when to modulate brake pressure to prevent locking. The anti-lock brake control module is the brain of the ABS, interpreting input from the sensors and controlling the hydraulic actuator to adjust braking force dynamically. The hydraulic actuator itself is essential because it applies and releases brake pressure to the wheels based on the commands from the control module.

In contrast, "bead" does not have relevance in the context of braking systems and does not play a role in the functioning of ABS. Beads are typically associated with tire construction or design and do not fit within the operational components of an ABS framework. Thus, identifying "bead" as the component not included in a typical anti-lock brake system is accurate and highlights the understanding of ABS components effectively.