Which finding on brake linings makes the brake unsafe until it is corrected?

• A.Linings that show even wear across the face
• B.Linings that are the same thickness on both sides of an axle
• C.Linings that are loose, soaked with oil or grease, or worn dangerously thin
• D.Linings that are clean and firmly riveted or bonded

Why

Loose, contaminated, or excessively worn linings cannot create dependable friction against the drum. Oil-soaked friction material is especially dangerous because it can make one wheel brake weakly while another wheel brakes normally.

Manual topic: Air Brakes - Brake Inspection · From the Air Brakes practice bank (AB-129).

Practice this subject as a full test

More Brake Inspection Steps & Defects questions

• During a pre-trip inspection of an air brake system, what is the main purpose of checking each brake component before driving?
• When you inspect rubber air hoses for the service brakes, which condition should be reported as a defect?
• What should brake drums (or discs) be checked for during an inspection?
• How do you test the low air pressure warning device during a pre-trip check?
• After building air pressure to governor cut-out, turning the engine off, and making a full brake application, what does a continuing drop on the air gauge after the initial drop tell you?