Red Seal Lather (Interior Systems Mechanic) Practice Exam

What technique is used for joining drywall seams?

1. Painting and sealing

2. Nailing and adhesive

3. Taping and finishing

4. Screwing and plastering

The correct answer is: Taping and finishing

Taping and finishing is the correct technique for joining drywall seams because it involves applying tape over the seams of the drywall to hide the joints and create a smooth surface. This process begins with applying joint compound, commonly referred to as mud, over the seams and embedding the tape into the compound. After that, additional layers of joint compound are applied to feather out the edges, ensuring that the seams are not visible once the surface is painted. This technique is crucial for achieving a seamless appearance on the wall or ceiling and provides a strong bond that prevents future cracking or separation. The alternative options mentioned do not adequately address the primary method used for joining drywall seams. While nailing and adhesive, or screwing and plastering, might be components in the overall installation of drywall, they do not specifically target the finishing of seams, which is essential for a professional look. Painting and sealing is a step that occurs after the drywall is fully installed and finished, making it a subsequent stage rather than a joining technique itself.