Mounting the main structure of the chairlift?

• A. Cleanup
• B. Chassis Installation
• C. Auto Fold
• D. Angle Chart

Answer: (B)

The main idea here is identifying the step that involves placing and securing the primary frame that everything else attaches to. Mounting the main structure of a chairlift is described by chassis installation because this step covers positioning, securing, and aligning the main frame that supports the drive system, carrier assembly, and other components. Without the chassis in place, none of the other parts can be correctly mounted or aligned, so this is the foundational installation task.

Cleanup is about tidying up after work, not putting together the main frame. Auto Fold would pertain to a folding mechanism rather than the structural mounting. An Angle Chart is a reference tool used during alignment or design, not the act of mounting the main structure.