NV C-4E Drywall Practice Questions - Nevada C-4E Drywall Contractor Examination Exam

What is the purpose of a control joint in a gypsum-board wall or ceiling?

To create a fire-rated penetration To relieve stresses from movement so the board does not crack To replace corner bead on outside corners To increase the R-value of the wall

Correct Answer:

To relieve stresses from movement so the board does not crack

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