California DMV Permit Test (Class C)Vehicle Operation and MaintenanceEasy
When driving a vehicle equipped with an Anti-lock Braking System (ABS), what is the correct action to take during an emergency stop?
- ASteer sharply to avoid the obstacle while lightly applying the brakes.
- BPress the brake pedal firmly and hold it down, allowing ABS to work.
- CApply less pressure to the brake pedal if you feel it pulsating.
- DPump the brake pedal rapidly to prevent wheel lock-up.
Show answer & explanationAnswer & explanation
Correct answer: B. Press the brake pedal firmly and hold it down, allowing ABS to work.
ABS is designed to prevent wheel lock-up during hard braking, allowing the driver to maintain steering control. For ABS to function correctly, the driver must press the brake pedal firmly and continuously, resisting the urge to pump the brakes, which was the technique for non-ABS systems.
Why the other options are wrong
- A. While steering is crucial, applying brakes lightly might not provide adequate stopping power. Firm, continuous braking with ABS allows for both stopping and steering.
- C. The pulsating feeling is normal for ABS and indicates it is working. Reducing pressure will decrease braking effectiveness.
- D. Pumping the brake pedal defeats the purpose of ABS and is an outdated technique for non-ABS vehicles.
ABS Emergency Braking
In vehicles with ABS, apply firm, continuous pressure to the brake pedal during an emergency stop to allow the system to prevent wheel lock-up and maintain steering control.
- Do NOT pump the brakes.
- Apply continuous, firm pressure.
- ABS allows steering control during hard braking.
Memory trick: ABS means 'Stomp and Stay', let the system save the day!