During a pre-trip inspection of an air brake system, what is the main purpose of checking each brake component before driving?

• A.To make the brakes feel firmer for the first stop of the day
• B.To set the air compressor governor for the load being hauled
• C.The purpose is to find defects that could reduce or cause loss of braking before the vehicle is operated
• D.To warm the brake drums before entering traffic

Why

A systematic brake inspection looks for damage, leaks, wear, and adjustment problems before they become a road failure. Finding those defects on the ground lets the vehicle be repaired instead of being driven with unreliable stopping power.

Manual topic: Air Brakes - Brake Inspection · From the Air Brakes practice bank (AB-126).

Practice this subject as a full test

More Brake Inspection Steps & Defects questions

• 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?
• 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?