Question Friction in an S-cam brake is caused when the brake shoes and linings: Answers Press against the outside of the brake drum. Press against the inside of the brake drum. Push against each other. Explanation Friction inside a brake drum is caused when the brake shoes and linings push against the inside of the drum. The friction in the drums will slow and stop the vehicle. Take a FREE Practice Test Now This questions appears in the following tests: Hawaii Knowledge Test Class A , Idaho Knowledge Test Class A , Arizona Knowledge Test Class B , Washington Knowledge Test Class B , Alaska Air Brakes , Michigan Air Brakes , Missouri Air Brakes , Ohio Air Brakes ,