The most common type of foundation brake used is the: Before you start the test, please answer the question below regarding your insurance status. Without insurance you will not be able to drive in Ohio Do you currently have car insurance? Yes I have insurance. Great, you're all set! Click here if you still want to compare rates. No, I need insurance and I want to compare options. Question The most common type of foundation brake used is the: Answers S-cam drum brake. C-cam drum brake. G-cam disc brake. P-cam disc brake. Explanation The most common type of foundation brake is an s-cam drum brake. This questions appears in the following tests: Alabama Air Brakes Colorado Class B Knowledge Test Colorado Air Brakes Connecticut Air Brakes Florida Air Brakes Georgia Air Brakes Illinois Class A Knowledge Test Illinois Air Brakes Minnesota Air Brakes Montana Class B Knowledge Test New Hampshire Class A Knowledge Test New Hampshire Double New Jersey Class A Knowledge Test New Jersey Air Brakes New York Class A Knowledge Test North Carolina Air Brakes North Carolina Air Brakes North Dakota Air Brakes Pennsylvania Class A Knowledge Test South Carolina Double South Carolina Air Brakes South Carolina Air Brakes Texas Air Brakes Wisconsin Class A Knowledge Test