NEIEP Mechanics Practice Exam

What happens when the pit down final limit switch is actuated?

1. The car begins downward motion

2. The car stops all motion

3. The car automatically levels

4. There is an alarm triggered

The correct answer is: The car automatically levels

When the pit down final limit switch is actuated, it indicates that the elevator car has reached its lowest permissible point within the shaft, often referred to as the pit. This switch is crucial for ensuring safety, as it signals the system to level the elevator car to the designated landing, which facilitates smooth entry and exit for passengers. By triggering this switch, the control system recognizes that the elevator has reached its limit of downward travel and initiates the leveling process. This action prevents the car from going lower, thereby averting potential accidents or damage. Options like the car beginning downward motion or stopping all motion would contravene the safety purpose of the limit switch. An alarm being triggered might occur in some situations, but the primary function of this switch is to ensure that the car levels at the lowest point instead. Thus, leveling is the intended and correct action associated with the actuation of the pit down final limit switch.