What should you check ensure that no unintended controls are activated in a metro system elevator?

To ensure that no unintended controls are activated in a metro system elevator, it is essential to check all available control mechanisms. Each type of switch serves a specific purpose in maintaining the safety and functionality of the elevator.

Out of Service switches allow operators to take an elevator out of service, ensuring it is not accessible for use while maintenance or inspection occurs. Checking these switches helps confirm that the elevator is not inadvertently made operational.

Emergency stop switches are crucial for immediate cessation of elevator movement in situations where safety is compromised. Ensuring these switches are not mistakenly activated prevents unplanned stops that could lead to safety hazards.

Override switches are used to bypass certain operational protocols for maintenance or emergency purposes. Verifying that these switches are not activated helps maintain proper operational integrity.

By checking all these controls, the operator can ensure the elevator remains in a safe and intended state, preventing any unintended consequences that could arise from accidental activation of the controls. As a result, all options collectively contribute to a comprehensive safety check.