Commercial Driver License (CDL) Class B Practice Test

If the ABS on your vehicle is not functioning, should you still have normal brake functions?

1. Yes, normal braking is still available

2. No, you will lose all braking ability

3. Only if the vehicle is moving slowly

4. It depends on the vehicle weight

The correct answer is: Yes, normal braking is still available

The correct answer indicates that normal braking is still available even if the Anti-lock Braking System (ABS) is not functioning. ABS is designed to prevent the wheels from locking up during hard braking, which helps maintain steering control. However, if the ABS is malfunctioning, the vehicle can still rely on the traditional braking system to stop. This means that the basic hydraulic brakes will still operate effectively, allowing a driver to slow down or stop the vehicle as needed. The key factor is that while the ABS provides additional safety and control in slippery conditions, it is not the sole means of achieving braking power. Hence, even without ABS, drivers retain the fundamental capability to stop their vehicle. Other options suggest partial or complete loss of braking capability, which is not accurate because the traditional brake system operates independently of the ABS feature. The weight of the vehicle and speed may affect stopping distance or handling but do not negate the primary function of the brakes themselves.