NCIDQ IDFX questions with correct answers

Advantages of Gypsum Drywall Answer low install cost, quick & easy installation, fire resistance, sound control capability, easy availability, versatility, ease of finishing & decorating, ease of installation of doors/other openings Gypsum Drywall Edges Answer Tapered: Most common; tapered on face side along the long dimension of the panel & square edges at the end; allows for application of reinforcing tape & joint compound without causing bulges at joints Square: used where appearance is NOT a factor, for basic layers of 2-layer applications & for veneer plaster work Levels of Gypsum Drywall Answer 1: plenums above ceilings & other areas not normally open to view (tape embedded in joint compound w/ surface free of excess compound 2. water resistant backing board (all joints & angles have tape embedded in joint & one separate coat of compound 3. heavy or medium textured finishes/heavy-grade wallcovering ( 2 coats of compound) 4. Light textured or wallcoverings & where economy is concerned (3 layers) 5. all paints, severe lighting conditions (4 layers) Studs are spaced how far apart? Answer residential: 16" O.C. commercial: 24" O.C. Slip Joint Answer prevent wall from being damaged if the structural floor deflects Plaster Construction Answer 1. Scratc