Air Brake Practice Test 2025 – 400 Free Practice Questions to Pass the Exam

A failure in the air brake system can be indicated by both the brake lights staying on and the presence of a warning buzzer or light. When the brake lights are constantly illuminated, it suggests that the brakes are not releasing as they should, which can be a sign of a malfunction in the system. This condition often indicates that there is still pressure in the brake lines, preventing the brakes from fully disengaging.

In addition, a warning buzzer or light serves as an alert system designed to notify the driver of any issues within the air brake system. This warning mechanism is crucial for maintaining safety, as it prompts the driver to take immediate action to investigate and rectify the problem before continuing to operate the vehicle.

The combination of these two indicators – the brake lights and the warning system – provides a clear signal that something is not functioning properly in the air brake system, hence both instances together represent a significant concern that requires attention.