California IDEX Practice Exam 2026 – Comprehensive Test Prep

Question: 1 / 400

Where could small ductwork most easily be placed within?

Beam-and girder steel

Flat-plate concrete

The placement of small ductwork is considerably facilitated within flat-plate concrete structures. This type of construction allows for a flat and unobstructed ceiling, which makes it easier to run ductwork without encountering the complications posed by beams or other structural elements.

In flat-plate concrete, the level surfaces provide ample space for ducts, allowing for a more straightforward installation process compared to other options which may have additional structural members that could hinder or complicate the routing of small ducts. Other constructions like beam-and-girder steel and open-web steel joists may introduce challenges due to the presence of structural elements that require careful navigation and planning.

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Open-web steel joists

Twin-tee concrete

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