Practice question

What does a brake-door interlock do on an urban mass transit coach?

  1. It applies the brakes and holds the throttle in idle when the rear door is open
  2. It replaces the parking brake whenever the bus is stopped
  3. It lets the driver accelerate with the rear door open
  4. It locks all emergency exits during passenger loading

Answer: A — It applies the brakes and holds the throttle in idle when the rear door is open

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