NCIDQ IDFX Practice Exam

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How does a tapered edge on gypsum drywall assist in installation?

It offers superior insulation
It allows for seamless application of tape and joint compound
It reduces the weight of the panel
It enhances fire resistance

The correct answer is: It allows for seamless application of tape and joint compound

A tapered edge on gypsum drywall is designed specifically to facilitate a smoother and more efficient installation process. When two panels are butted together at their tapered edges, it creates a recessed joint. This recessed area allows for an even application of tape and joint compound, which is essential for creating a seamless finish. This joint treatment helps to conceal the seams between panels, resulting in a uniform surface that is easier to finish and paint. In contrast, the options related to insulation, weight reduction, and fire resistance do not directly pertain to the primary functional benefit of tapered edges during installation. While tapered edges may contribute indirectly to the overall performance of a drywall assembly, their primary function in this context is to provide an optimal edge for smooth finishing, critical for achieving high-quality results in drywall installations.