Under what wheel-speed condition does anti-skid operate to reduce brake pressure?

Under what wheel-speed condition does anti-skid operate to reduce brake pressure?

• A. Below 10 knots
• B. Above 50 knots
• C. At 0 knots
• D. Between 10 and 50 knots

Answer: (A)

Anti-skid braking relies on wheel-speed sensors to prevent tire skid by modulating brake pressure when the wheel is about to lose traction. The risk of a skid is highest when wheels are turning slowly, because a small amount of braking force can stop a wheel from revolving while the aircraft is still moving. In that low-speed regime, the system automatically reduces brake pressure to let the wheel regain rotation and then can reapply braking as needed. This low-wheel-speed condition—around when the wheel speed falls below about 10 knots—is when anti-skid actively intervenes to prevent lockup.

Anti-skid braking relies on wheel-speed sensors to prevent tire skid by modulating brake pressure when the wheel is about to lose traction. The risk of a skid is highest when wheels are turning slowly, because a small amount of braking force can stop a wheel from revolving while the aircraft is still moving. In that low-speed regime, the system automatically reduces brake pressure to let the wheel regain rotation and then can reapply braking as needed. This low-wheel-speed condition—around when the wheel speed falls below about 10 knots—is when anti-skid actively intervenes to prevent lockup.