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!

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What are the three braking systems that make up an air brake system?

Service brake, parking brake, and backup brake
Service brake, emergency brake, and safety brake
Service brake, parking brake, and emergency brake
Parking brake, hydraulic brake, and emergency brake

The correct answer is: Service brake, parking brake, and emergency brake

The three braking systems that constitute an air brake system are the service brake, parking brake, and emergency brake. The service brake is the primary braking system used to slow down or stop the vehicle during normal driving. When the driver applies the brake pedal, air is released from the storage tanks and travels to the brake chambers, applying pressure to the brakes. The parking brake is designed for securing the vehicle when it is parked. It engages the brakes through a different mechanism than the service brake and is crucial for preventing the vehicle from rolling when stationary, particularly on an incline. The emergency brake, also known as an emergency stopping system, is intended for use in the event that the service brake fails. It provides a means of safely slowing the vehicle down to prevent accidents. Understanding the roles of each of these systems is essential for safe operation and maintenance of vehicles equipped with air brakes, as well as ensuring compliance with safety regulations.