Practice question

What is the primary safety function of a dual air brake system in a heavy passenger bus?

  1. To double the braking power when descending steep hills
  2. To provide separate front and rear brake circuits in case of a system leak
  3. To allow the passenger bus to travel at higher speeds safely
  4. To automate the parking brake release process during departures

Answer: B — To provide separate front and rear brake circuits in case of a system leak

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