What should brake drums (or discs) be checked for during an inspection?

• A.A light coating of road dust on the outside of the drum
• B.Cracks, serious damage, and signs that the braking surface is not safe to use
• C.Paint that has faded from heat and age
• D.A smooth appearance with no visible lettering

Why

Cracks and other damage weaken the drum and reduce the surface the linings can grip evenly. A damaged drum can worsen braking, damage new linings, or fail under the heat and stress of repeated stops.

Manual topic: Air Brakes - Brake Inspection · From the Air Brakes practice bank (AB-128).

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