When ABS is activated, what type of noise may you hear?

When Anti-lock Braking System (ABS) is activated, the characteristic sound that you may hear is indeed a grinding noise. This sound occurs because the ABS system is rapidly pulsing the brakes to prevent wheel lock-up during heavy braking situations. The grinding noise is a result of the brake pads engaging and disengaging as the system works to maintain traction and control, especially on slippery surfaces.

This pulsing action helps the driver maintain steering ability during hard braking, which is crucial for safety. It's important for drivers to recognize that this noise is normal and indicates that the ABS is functioning properly. While other options might suggest possible sounds experienced in different contexts, they do not accurately represent the sound associated with ABS when it is actively engaged.