How does an anti-skid system protect against wheel lock under heavy braking?

• A. It applies full braking on all wheels to maximize stopping power.
• B. It ignores wheel speed to maintain constant pedal feel.
• C. It monitors wheel speeds and reduces brake pressure to the wheel that is approaching lock while maintaining braking force on other wheels.
• D. It locks the brakes on uneven terrain.

Answer: (C)

Anti-skid (ABS) keeps wheels from stopping rotation by constantly watching wheel speeds and adjusting brake pressure. When a wheel starts to slow much faster than the others—an impending lock—the system eases pressure on that wheel just enough to let it recover rotation, while the other wheels continue to brake. It repeats this quick on/off modulation, keeping the wheels in a controlled slip range rather than a full skid. This preserves steering control and helps achieve the best possible deceleration. So the correct approach is to monitor wheel speeds and reduce pressure on the wheel near lock while maintaining braking force on the others.