Michigan State Brakes Certification Practice Exam

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An example of an incorrect procedure for replacing brake pads in a disc brake system is:

  1. Remove the caliper assembly

  2. Replace only worn pads on one side

  3. Remove the piston from the caliper and clean all rust corrosion, and dirt

  4. Inspect the rotor for wear

The correct answer is: Remove the piston from the caliper and clean all rust corrosion, and dirt

The procedure involving the removal of the piston from the caliper and cleaning all rust, corrosion, and dirt is not typically how brake pads should be replaced. While maintaining the integrity of the brake system is crucial, this step can introduce unnecessary risk of damaging the piston, which can lead to brake fluid leaks or improper seating of the piston once reassembled. Instead, properly replacing brake pads involves removing the caliper (which is consistent with best practices), ensuring that both pads are replaced to maintain even braking force across the rotor, and inspecting the rotor for wear. All these actions help ensure that the braking system functions effectively and safely, whereas cleaning the piston is a more advanced maintenance task that should be performed only when necessary, rather than as part of a standard pad replacement procedure.