Arizona Air Brakes CDL Practice Test

What should you do when the low pressure warning is activated?

1. Wait for the air brakes to come on automatically

2. Bring the vehicle to a safe stop while you still control the brakes

3. Monitor your air pressure gauge and maintain highway speeds

4. Pump the brake pedal hard to stop

The correct answer is: Bring the vehicle to a safe stop while you still control the brakes

When the low pressure warning is activated, the correct response is to bring the vehicle to a safe stop while you still have control of the brakes. This warning indicates that air pressure in the braking system has dropped below a safe level, which could lead to a loss of braking capability. It is essential to act quickly because continuing to drive with low air pressure can result in the brakes not functioning properly or even failing completely. Safely bringing the vehicle to a stop ensures that you maintain control of the situation, preventing potential accidents or hazardous situations on the road. This proactive measure allows you to address the issue with your braking system in a controlled manner, rather than risking sudden brake failure while driving at speed. Monitoring air pressure while maintaining highway speeds, waiting for the automatic brakes to engage, or forcibly pumping the brakes could all lead to dangerous outcomes, as they do not prioritize immediate action to ensure safety when low air pressure is detected.