NEIEP Mechanics Practice Exam

What is the correct position for aligning the comb plate teeth with the walkway treads?

1. The teeth must be above the upper surface of the treads

2. The teeth must be on the same level as the treads

3. The teeth must be below the upper surface of the treads

4. The teeth must be positioned away from the treads

The correct answer is: The teeth must be below the upper surface of the treads

The correct position for aligning the comb plate teeth with the walkway treads is achieved when the teeth are below the upper surface of the treads. This alignment is crucial for safety and functionality in escalators and moving walkways. When the comb plate teeth are positioned below the treads, it helps to prevent tripping hazards for passengers as they step on or off the escalator. It ensures that there is a smooth transition from the moving part of the escalator to the stationary part, allowing for safe entry and exit. Proper alignment of the comb teeth also assists in engaging the treads effectively, minimizing wear and tear on both the comb and the treads. If the teeth were above the treads or level with them, there would be an increased risk of catching shoes or garments, which could lead to accidents. Positioning the teeth away from the treads does not contribute to the function required to guide passengers safely as they use the escalator. Thus, aligning the comb teeth below the tread surface is essential for maintaining both safety and operational effectiveness.