What are the major components of a Class 1 vehicle's air brake system?

• A. Engine, transmission, wheels, and tires
• B. Compressor, reservoirs, valves, and brake chambers
• C. Steering wheel, mirrors, lights, and brakes
• D. Fuel tank, exhaust, cooling system, and brakes

Answer: (B)

The major components of a Class 1 vehicle's air brake system consist of the compressor, reservoirs, valves, and brake chambers. The compressor is essential as it generates the air pressure needed to operate the entire braking system. This pressurized air is stored in reservoirs, which act as storage tanks that provide a reserve of air for braking.

Valves are critical in controlling the flow of air within the system, directing it to various parts of the braking mechanism as needed. The brake chambers convert the air pressure into mechanical force, applying pressure to the brake pads or shoes, ultimately slowing down or stopping the vehicle. Understanding these components is vital for anyone operating a Class 1 vehicle, as they play a significant role in the safe and effective functioning of the air brake system.