True or False: An escalator must stop a descending escalator at a rate no greater than 3 ft/sec².

The statement is true because safety regulations for escalators dictate that the rate of deceleration for a descending escalator must not exceed 3 feet per second squared. This safety standard is put in place to ensure a smooth and controlled stop, minimizing the risk of sudden jolts which could lead to accidents or injuries. A controlled deceleration allows riders to maintain their balance and prevents the possibility of falls or other harmful incidents. Compliance with this standard is a critical aspect of escalator safety design and operation, ensuring reliability and user safety during normal usage and emergencies alike.