What are the checks performed during the safety test of an elevator?

The safety test of an elevator is a critical procedure designed to ensure that all safety mechanisms and operational features are functioning correctly. The checks performed during this test include verifying the emergency brake system, which is crucial for ensuring that the elevator can stop safely in case of a malfunction. Door locks are also tested to confirm that they operate properly, preventing the doors from opening while the elevator is in motion or when it is not at a designated landing. Additionally, car leveling accuracy is assessed to ensure that the elevator aligns correctly with the landing floors, which is essential for passenger safety and convenience.

Testing these components collectively ensures that the elevator operates within safety parameters and meets regulatory standards, making option B the correct choice. The other options, while they may involve aspects of elevator functionality, do not focus directly on critical safety components that are vital during the safety test.