NCIDQ: IDFX -3 EXAM 2025 QUESTIONS AND ANSWERS

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NCIDQ: IDFX -3 EXAM 2025 QUESTIONS AND ANSWERS

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Typical GWB sizes - ANS 4' x 8/10/12/14' 5/8" = commercial 1/2" = residential 1/4" = curved/laminated 3/8" = @ double layer GWB facts - ANS expensive to recycle, can be ground up for soil installation = quick/easy/cheap type X = fire rated foil-backed = vapor barrier water-resistant GWB finishes - ANS 0: no finishing 1: tape + compound (above ceiling, not seen) 2: water resistant (2 layers of compound) 3: 2 layers compound + textured material 4: 3 coats + wallcovering 5: 3 coats + skim coat + specialty finish NCIDQ: IDFX -3 EXAM 2025 QUESTIONS AND ANSWERS 2 Copyright ©2025 SIRJOEL ALL RIGHTS RESERVED steel stud sizes - ANS 1 5/8" 2 1/2" 3 5/8" 4" 6" spaced 16" oc - residential spaced 24" oc - commercial GWB trim - LC bead - ANS fits on edge of drywall & compound, before installation GWB trim - L bead - ANS after installation & compound GWB trim - U bead - ANS edge of material is noticeable GWB trim - LK bead - ANS for various sizes of GWB, kerfered jamb Glass Reinforces Gypsum (GRG) - ANS gypsum + fiberglass, molded prefab for arches, columns, trims, etc Lath + Plaster - ANS metal (diamond/ribbed) or gypsum lath plaster = cement + aggregates + water coats: -scratch (1/4 - 1/2") -brown (1/4") -finish (1/8") 3 Copyright ©2025 SIRJOEL ALL RIGHTS RESERVED masonry - ANS brick, CMU, terra-cotta, tile used for heavy use or aesthetic glass block - ANS hollow 4" thick (6x6, 8x8, 12x12, 4x8) stack bond with expansion joints demountable partitions - ANS individual components, quick to install/reconfigure, total salvageability - coordinate HVAC, bldg module, lighting higher upfront cost -floor/ceiling runner -stud section -GWB w/ vwc applied door operation types - ANS swing (hinge/pivot) pocket-sliding bypass-sliding bi-fold accordion folding doors - wood, f

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NCIDQ: IDFX -3 EXAM 2025 QUESTIONS
AND ANSWERS

Typical GWB sizes - ANS 4' x 8/10/12/14'

5/8" = commercial
1/2" = residential
1/4" = curved/laminated
3/8" = @ double layer

GWB facts - ANS expensive to recycle, can be ground up for soil

installation = quick/easy/cheap

type X = fire rated
foil-backed = vapor barrier
water-resistant

GWB finishes - ANS 0: no finishing
1: tape + compound (above ceiling, not seen)
2: water resistant (2 layers of compound)
3: 2 layers compound + textured material
4: 3 coats + wallcovering
5: 3 coats + skim coat + specialty finish
1 Copyright ©2025 SIRJOEL ALL RIGHTS RESERVED

,steel stud sizes - ANS 1 5/8" 2 1/2" 3 5/8" 4" 6"

spaced 16" oc - residential
spaced 24" oc - commercial

GWB trim - LC bead - ANS fits on edge of drywall & compound, before installation

GWB trim - L bead - ANS after installation & compound

GWB trim - U bead - ANS edge of material is noticeable

GWB trim - LK bead - ANS for various sizes of GWB, kerfered jamb

Glass Reinforces Gypsum (GRG) - ANS gypsum + fiberglass, molded

prefab for arches, columns, trims, etc

Lath + Plaster - ANS metal (diamond/ribbed) or gypsum lath

plaster = cement + aggregates + water

coats:
-scratch (1/4 - 1/2")
-brown (1/4")
-finish (1/8")

2 Copyright ©2025 SIRJOEL ALL RIGHTS RESERVED

, masonry - ANS brick, CMU, terra-cotta, tile

used for heavy use or aesthetic

glass block - ANS hollow

4" thick (6x6, 8x8, 12x12, 4x8)

stack bond with expansion joints

demountable partitions - ANS individual components, quick to install/reconfigure, total
salvageability - coordinate HVAC, bldg module, lighting

higher upfront cost

-floor/ceiling runner
-stud section
-GWB w/ vwc applied

door operation types - ANS swing (hinge/pivot)
pocket-sliding
bypass-sliding
bi-fold
accordion folding

doors - wood, flush - ANS hollow-core (1 3/8")

3 Copyright ©2025 SIRJOEL ALL RIGHTS RESERVED

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Contains: Questions & answers

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NCIDQ: IDFX -3 EXAM 2025 QUESTIONS AND ANSWERS

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