Which system is incorporated in the braking system to prevent a wheel and tire assembly from stopping in its rotation?

• A. Parking brake
• B. Hydraulic booster
• C. Anti-skid
• D. Emergency brake

Answer: (C)

Preventing wheel lock during braking is the job of the anti-skid system. It watches how fast each wheel is turning and, if a wheel is about to stop rotating too quickly (threatening a skid), it momentarily reduces brake pressure to that wheel or pulses braking. This keeps the wheel in rotation, preserves tire-road contact, and maintains directional control, which typically shortens stopping distance on slippery surfaces and during landing rollouts. The system uses wheel-speed sensors and a controller to modulate brake pressure on individual wheels.

Parking brake holds the aircraft in place when parked. A hydraulic booster only increases braking assist from the hydraulic system. An emergency brake is a separate, rapid-deceleration mechanism not designed to manage wheel rotation during normal braking.