What are the typical signs of a door operation fault you should report?

What are the typical signs of a door operation fault you should report?

• A. Doors never open.
• B. Doors open with obstruction, audible alarms, or cab indicator warnings.
• C. Doors operate normally without any alarms.
• D. Doors fail to open/close, doors open with obstruction, audible alarms, or cab indicator warnings.

Answer: (D)

Recognize door faults by any indication that the doors aren’t operating safely or as intended. Signs include doors failing to open or close, doors opening when an obstruction is present, and warnings such as audible alarms or cab indicator alerts. These signals alert you to a potential safety issue that must be reported so maintenance can fix it before someone is injured or service is disrupted.

If doors are operating normally with no alarms, that’s not a fault. Focusing only on one symptom, like doors never opening, misses other important fault signs such as obstructions or alarms. The most complete and appropriate choice covers all these indicators, making it the best answer.