Practice question

What physical and chemical changes occur in brake components during severe brake fade?

The brake shoes contract and fall out of the backing plate
Excessive heat causes the friction linings to release gases (outgassing) and glaze, reducing the coefficient of friction between the shoe and drum
The brake drum shrinks, locking the wheels completely
The S-cam shaft twists 180 degrees, reversing the direction of brake application

Answer: B — Excessive heat causes the friction linings to release gases (outgassing) and glaze, reducing the coefficient of friction between the shoe and drum

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