Which statement best describes the lift safety action regarding obstructions below?

• A. Stops lift when an obstruction is detected above the car
• B. The safety system becomes inoperative with obstruction
• C. Stops lift if obstruction detected below
• D. Shuts down for maintenance after obstruction

Answer: (C)

When an obstruction is detected in the path of the escalator at the lower end, the safety system immediately stops the drive. Obstructions below the car present a direct risk to anyone stepping onto or off the escalator, or to someone who is standing at the lower landing, because the steps are moving away from them and could cause crushing or entrapment. Stopping the lift at that moment prevents injury and allows the obstruction to be removed safely.

The other options don’t reflect the appropriate protective action: detecting an obstruction above the car isn’t the primary hazard the lower-safety devices guard against; making the safety system inoperative would remove protection; and shutting down for maintenance after an obstruction isn’t the automatic response designed to quickly protect people.