Louisiana Class D Chauffeur's License Practice Test

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Prepare for the Louisiana Class D Chauffeur's License Test. Study with multiple choice questions and hints that help build your knowledge. Ensure success on your exam day!

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.

If the air pressure in the tanks falls below which pressure, the low air pressure warning will activate?

50psi
60psi
70psi
80psi

The correct answer is: 60psi

The low air pressure warning activates when the pressure in the tanks falls below 60 psi. This is an important safety feature to ensure that the driver is alerted to decreasing air pressure levels, which can lead to brake system failure or reduced braking efficiency. Maintaining adequate air pressure is essential for the proper functioning of air brakes in commercial vehicles. If the pressure drops below this threshold, it indicates that the air supply for the brake system may be inadequate, prompting the driver to take necessary actions, such as safely stopping the vehicle and checking the system. Understanding the importance of this pressure level and the warning system helps drivers maintain safety on the road.