Michigan CDL - Air Brakes Practice Exam

What is the maximum allowable movement of a slack adjuster from its attachment to the push rod during inspection?

1. No more than one inch

2. No more than three inches

3. No more than half an inch

4. No more than two inches

The correct answer is: No more than one inch

The maximum allowable movement of a slack adjuster from its attachment to the push rod during inspection is one inch. This specification is vital for ensuring the proper functioning of the air brake system. Slack adjusters are essential components that help maintain the correct tension in the brake system, thereby ensuring that the brakes engage effectively when needed. If the slack adjuster moves more than the specified limit during inspection, it may indicate wear or malfunction, which could compromise braking efficiency and pose a safety hazard on the road. Maintaining the movement within this limit helps ensure that the vehicle's braking system remains responsive and safe for operation. Exceeding this limit could allow for inadequate brake application or uneven wear on brake components, leading to potential failures when brakes are applied. Hence, adhering to the one-inch maximum movement reflects industry standards for safety and reliability in air brake systems.