Air Brake Practice Test

Disable ads (and more) with a membership for a one time $2.99 payment

Prepare for the Air Brake Test with flashcards and multiple choice questions, each offering hints and explanations. Get set to ace your test!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

What action should a driver take immediately if the air pressure drops below safe levels?

Increase engine RPM
Continuously apply the brakes
Pull over safely and stop the vehicle
Check the brake fluid

The correct answer is: Pull over safely and stop the vehicle

When the air pressure in the brake system drops below the safe levels, it is crucial for the driver to take immediate action to ensure safety. Pulling over safely and stopping the vehicle is the most appropriate response. This action helps prevent potential brake failure or diminished braking capability, which can lead to dangerous situations, especially during heavy braking or emergency maneuvers. Maintaining adequate air pressure is vital for the operation of air brakes, as low pressure can mean that the brakes will not function effectively or at all. By stopping the vehicle, the driver can assess the situation and rectify the issue before attempting to drive again. This ensures not only the safety of the driver but also the safety of other road users. In contrast, increasing engine RPM may momentarily boost air pressure but does not address the underlying issue and might not be sufficient to restore safe functioning. Continuously applying the brakes while low on air pressure risks overheating and damaging the brake system. Checking brake fluid is not relevant in the context of air brake systems, which operate on compressed air rather than hydraulic fluid.