Practice question

The service door fails to fully open and obstructs the stepwell when the air system is at full pressure. What is the safest course?

Disable the door interlock
Tell the driver to push the door manually each stop
Reduce system air pressure to mask the symptom
Diagnose and repair the door mechanism so it opens fully and clears the entrance before service

Answer: D — Diagnose and repair the door mechanism so it opens fully and clears the entrance before service

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