NEIEP Mechanics Practice Exam

What does the Escalator Starting Switch consist of?

1. A single toggle switch

2. Two key operated switches with settings of UP, DOWN, and a spring return to center

3. Three push-button switches

4. A remote control system

The correct answer is: Two key operated switches with settings of UP, DOWN, and a spring return to center

The Escalator Starting Switch is designed to provide precise control over the direction of the escalator's movement—either up or down. This switch typically incorporates two key-operated switches, allowing an operator to select the desired direction. The inclusion of settings for both UP and DOWN ensures that the escalator can be operated safely and efficiently in either direction. The spring return to center function is particularly significant. It ensures that when the operator releases the switch, it automatically returns to the neutral position, preventing accidental or unintended operation. This design enhances operational safety by minimizing the risk of the escalator moving in an undesired direction if the switch is inadvertently left engaged. The other options describe systems that would not provide the necessary directional control and safety features required for an escalator. A single toggle switch might not adequately indicate the direction, while three push-button switches could lead to confusion regarding which direction is currently selected. A remote control system, although modern and convenient, does not traditionally fit the standard control mechanism for escalators as specified in the context of this question.