Texas Driver's License Knowledge TestSafe Driving PracticesHard
A driver is operating a vehicle equipped with Anti-lock Braking System (ABS) on a wet road and needs to perform an emergency stop. What is the correct technique for using ABS effectively?
- AEngage the parking brake simultaneously with the foot brake.
- BPump the brakes rapidly to prevent lock-up.
- CApply light pressure to the brake pedal and steer gently.
- DPress the brake pedal firmly and hold it down, allowing ABS to work.
Show answer & explanationAnswer & explanation
Correct answer: D. 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. To activate ABS and utilize its full capability, the driver should press the brake pedal firmly and continuously, resisting the urge to pump the brakes, which is an outdated technique for non-ABS vehicles. The system will then modulate brake pressure automatically.
Why the other options are wrong
- A. Engaging the parking brake while driving is dangerous and can cause loss of control; it is not for emergency braking.
- B. Pumping the brakes is the incorrect technique for vehicles with ABS; it prevents the system from working effectively.
- C. Light pressure is not sufficient for an emergency stop, and while gentle steering is good, the braking technique is wrong.
ABS Emergency Braking
To use ABS effectively during an emergency stop, apply firm, continuous pressure to the brake pedal; do not pump the brakes.
- ABS prevents wheel lock-up.
- Allows steering control during braking.
- Driver should feel pulsation in the pedal (normal).
Memory trick: Stomp and stay, let ABS lead the way; don't pump, just pray.