New Jersey Air Brakes Practice Test

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Prepare for the New Jersey Air Brakes Test with practice quizzes featuring flashcards and multiple choice questions, complete with hints and explanations. Get exam-ready today!

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At what air pressure will the spring brakes bring a straight truck to a stop?

30 psi
25 psi
20 psi
15 psi

The correct answer is: 20 psi

The correct answer is 20 psi because spring brakes are designed to activate automatically when the air pressure drops to this level. This action is a safety feature that ensures the brakes are applied if the air pressure becomes critically low, which could indicate a failure in the air brake system. When the air pressure in the system falls below 20 psi, the spring brakes engage and help bring the vehicle to a stop, preventing potential accidents due to loss of braking ability. Understanding this critical pressure threshold is essential for safe operating practices and recognizing the importance of maintaining adequate air pressure in the braking system.