What happens if a brake lining becomes soaked with oil or grease?

• A.It brakes better because the drum is lubricated
• B.Its friction drops sharply, braking weakens at that wheel, and a fire risk can develop as the brake heats
• C.Nothing, oil does not affect air brakes
• D.Only the parking brake on that wheel is affected

Why

Friction linings must stay dry and clean to grip the drum. Oil contamination means the leak must be fixed and the contaminated linings replaced, because cleaning alone rarely restores safe friction.

Manual topic: Air Brakes - Air Brake System Components · From the Air Brakes practice bank (AB-024).

Practice this subject as a full test

More Dual Air Brake System & Components questions

• What is the main purpose of a dual air brake system on a modern truck?
• In a dual air brake system, what does the primary system typically control?
• In a dual air brake system, what does the secondary system typically control?
• How can a driver monitor a dual air brake system while driving?
• If one circuit of a dual air brake system fails completely, what should the driver expect?