Question When an S-cam turns inside a brake drum, the S-cam: Answers Presses the brake shoes against the inside of the brake drum. Presses the brake shoes against the brake linings. Presses the brake linings against the wheel axles. Explanation When a brake pedal is pressed and the S-cam is turned, the S-cam presses the brake shoes against the inside of the brake drum. This causes friction and will cause the vehicle to slow. Take a FREE Practice Test Now This questions appears in the following tests: California Knowledge Test Class A , Hawaii Knowledge Test Class A , New Mexico Knowledge Test Class A , Nebraska Knowledge Test Class B , Maine Double , Wyoming Double , Arizona Air Brakes , Connecticut Air Brakes ,