Practice question

What is the correct use of a brake-door interlock on an urban mass transit coach?

  1. Treat it as a safety feature, but do not use it in place of the parking brake
  2. Use it instead of the parking brake whenever the rear door is open
  3. Disable it because it holds the throttle idle
  4. Use it only to increase acceleration after loading

Answer: A — Treat it as a safety feature, but do not use it in place of the parking brake

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