Practice question

What is the cause of 'brake fade' when driving a heavy lorry down a long, steep gradient?

  1. The air compressor fails to pump enough air to the chambers
  2. The brake drums or discs overheat from constant use, reducing friction
  3. The brake pedal mechanism gets jammed by road debris
  4. The thickness of the brake linings increases temporarily

Answer: B — The brake drums or discs overheat from constant use, reducing friction

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