Study for the New Jersey Air Brakes Test. Prepare with flashcards and multiple choice questions, each with hints and explanations. Get ready for your exam!

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At what pressure must the low air pressure warning light activate?

  1. 50 psi

  2. 60 psi

  3. 70 psi

  4. 80 psi

The correct answer is: 60 psi

The low air pressure warning light is designed to activate when the air pressure in the braking system drops to a level where the system's effectiveness may be compromised. In most commercial vehicles, the standard pressure at which the warning light should activate is set at 60 psi. This is a critical safety feature that alerts the driver to a potentially dangerous condition, prompting them to take action before air pressure becomes too low to operate the brakes effectively. Understanding this pressure threshold is essential for maintaining safe operation and adherence to regulations in vehicles equipped with air brakes.