What can a power outage cause for hoistway operations?

A power outage can lead to elevators stopping because they rely on electrical power to function properly. When the power is interrupted, the normal operation of the elevator system is disrupted, potentially leaving the elevator in a position where it cannot move until power is restored. This situation necessitates the engagement of backup systems, such as emergency power supplies or procedures, to ensure that elevator passengers can be safely evacuated if they are trapped inside.

In contrast, the other choices suggest scenarios that are not realistic in the event of a power outage. Elevators cannot operate faster or normally without power, nor can they continue operations without any interruption. These alternatives do not align with the operational realities of elevator systems and their dependence on electrical power to function safely and effectively.