Red Seal Lather (Interior Systems Mechanic) Practice Exam

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When installing a suspended ceiling, what is the purpose of the main runner?

To provide aesthetic appeal
To support the cross tees and ceiling tiles
To enhance sound absorption
To facilitate electrical wiring

The correct answer is: To support the cross tees and ceiling tiles

The main runner in a suspended ceiling system plays a critical structural role. It is specifically designed to support the cross tees, which are subsequently used to hold the ceiling tiles in place. By providing a central framework, the main runner ensures that the ceiling is stable and well-aligned, distributing the weight of the tiles evenly across the structure. This helps maintain the integrity of the ceiling and prevents sagging or shifting over time. Additionally, while other elements such as aesthetic appeal, sound absorption, and electrical wiring can be factors within the broader context of ceiling design and installation, they are not the primary function of the main runner itself. Instead, the main runner’s main purpose is to provide essential support for the ceiling structure, ensuring it is durable and effective.