Devices used in an air brake system that connect between the activation pads and the brake pads to compensate for brake pad wear are known as which?

• A. Auxiliary, brake cylinder
• B. Slack Adjusters
• C. Reservoir
• D. Chamber

Answer: (B)

In air brake systems, wear on the brake linings creates extra space between the actuating mechanism and the brake shoes. The device that connects the brake chamber push rod to the brake mechanism and automatically takes up that slack as it wears is the slack adjuster. It lengthens slightly during braking as needed, so the shoes contact the drum at the proper distance and pedal travel stays consistent. This keeps braking force reliable without you having to adjust things manually. Other parts like the auxiliary brake cylinder, reservoir, or brake chamber are essential, but they don’t perform the wear-compensation function that slack adjusters provide.