Georgia Commercial Driver License Practice Test

What should you do if the slack adjuster moves more than an inch?

1. Ignore it

2. Replace the brake lining

3. Adjust it

4. Drive cautiously until checked

The correct answer is: Adjust it

If the slack adjuster moves more than an inch, it's essential to adjust it immediately. The slack adjuster is a critical component of the braking system in commercial vehicles, specifically in air brake systems, which can affect the overall braking performance and safety of the vehicle. When the slack adjuster has excessive movement, it indicates that the brake components may be improperly adjusted, leading to a potentially dangerous situation where the brakes may not engage properly. Adjusting the slack adjuster helps ensure that the brakes function correctly and effectively, reducing the risk of brake failure while driving. Failing to take action, such as ignoring the excessive movement, could compromise safety and result in longer stopping distances or even brake failure. On the other hand, replacing brake lining is unnecessary if the issue only pertains to the slack adjuster. Driving cautiously may be prudent in some situations, but it does not address the underlying issue, which could lead to a more severe problem down the road. Adjusting the slack adjuster is the responsible and necessary action to maintain safe operations.