Before using the elevator car sling as a running platform, what must be operational and tested?

The correct answer is the governor and safeties. Before utilizing the elevator car sling as a running platform, it is crucial to ensure that both the governor and safety devices are operational and tested. The governor is responsible for monitoring the speed of the elevator; if it exceeds a predetermined limit, the governor activates the safety mechanisms to prevent the elevator from falling or malfunctioning. The safeties serve as a backup system, designed to engage in case of unexpected conditions, ensuring the elevator operates safely and effectively.

Testing these systems is an important safety measure, as it confirms that any potential issues are identified and resolved before using the elevator car sling. Properly functioning governors and safeties protect users and ensure compliance with safety regulations, which is vital in any work environment involving heavy machinery or equipment like elevators.