When vehicle wheels are about to lock, the ABS senses the impending lock up and prevents this from occurring.
a)
True
b)
False
The correct answer and explanation is:
The correct answer is a) True.
Anti-lock braking systems (ABS) are designed to prevent wheel lock-up during braking, which can occur in sudden or hard braking situations. When a driver applies the brakes, the system constantly monitors the wheel speed using sensors. If the ABS detects that any wheel is about to lock, meaning it is rotating slower than the others and is at risk of skidding, the system quickly adjusts the brake pressure. It does this by rapidly releasing and reapplying the brakes, which prevents the wheels from locking up.
The primary purpose of ABS is to maintain steering control during an emergency stop. If a wheel locks up, the driver loses the ability to steer, increasing the risk of an accident. ABS allows the driver to continue to steer and maneuver the vehicle while braking hard. In addition, the rapid pressure modulation reduces the stopping distance on slippery surfaces, like wet or icy roads.
ABS is particularly helpful in preventing skidding and maintaining vehicle control in high-stress situations. However, it does not shorten the overall stopping distance on dry roads; its effectiveness is more noticeable under adverse conditions like rain, snow, or gravel. Some people believe that ABS will help them stop faster, but the real advantage is maintaining control, especially in low-traction environments.
To summarize, ABS works by sensing wheel speed and preventing the wheels from locking up when a driver applies the brakes, improving control and reducing the chances of skidding.