NCIDQ IDFX 2026 Expert
Verifed Ace the Test
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. Scratch Coat
2. Brown Coat (level surface)
3. Finish Coat (Leveling & desired texture)
,*Add Trim
Masonry Block Dimensions - ANSWER ✔✔8"x8"x16" (-3/8" for mortar
joints)
Demountable Partitions - ANSWER ✔✔Consists of a system of
individual components that can be quickly assembled, disassembled &
reused with nearly total salvageability
consists of floor runners, ceiling runners, stud sections with clips to hold
panels, & prefinished gyp. wallboard panels
uses aluminum for framing
Definition: Hinges - ANSWER ✔✔Consist of 2 leaves with an odd
number of knuckles on one leaf and an even number of knuckles on the
other
knuckles are attached with a pin
knuckle + pin = barrel (finished with tip)
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2026. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED
, Types of Hinge Tips - ANSWER ✔✔-flat button (most common;
typical)
-hospital
-oval head (typical)
-steeple
-flush
Butt Hinge - ANSWER ✔✔MOST COMMON; has both leaves fully
mortised into the frame and the edge of the door so the hinge is flush
with the surface of the frame and door
raised barrel hinge - ANSWER ✔✔used when there is not room for
the barrel to extend past the door trim; OFFSET to allow one leaf to be
mortised into the frame (kind of has an L shape on each side)
swing clear hinges - ANSWER ✔✔has a special shape that allows
the door to swing 90 degrees or 95 degrees so the full opening of the
doorway is available
definition: latches & locksets - ANSWER ✔✔device to operate a door,
hold in position & lock it
Verifed Ace the Test
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. Scratch Coat
2. Brown Coat (level surface)
3. Finish Coat (Leveling & desired texture)
,*Add Trim
Masonry Block Dimensions - ANSWER ✔✔8"x8"x16" (-3/8" for mortar
joints)
Demountable Partitions - ANSWER ✔✔Consists of a system of
individual components that can be quickly assembled, disassembled &
reused with nearly total salvageability
consists of floor runners, ceiling runners, stud sections with clips to hold
panels, & prefinished gyp. wallboard panels
uses aluminum for framing
Definition: Hinges - ANSWER ✔✔Consist of 2 leaves with an odd
number of knuckles on one leaf and an even number of knuckles on the
other
knuckles are attached with a pin
knuckle + pin = barrel (finished with tip)
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2026. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED
, Types of Hinge Tips - ANSWER ✔✔-flat button (most common;
typical)
-hospital
-oval head (typical)
-steeple
-flush
Butt Hinge - ANSWER ✔✔MOST COMMON; has both leaves fully
mortised into the frame and the edge of the door so the hinge is flush
with the surface of the frame and door
raised barrel hinge - ANSWER ✔✔used when there is not room for
the barrel to extend past the door trim; OFFSET to allow one leaf to be
mortised into the frame (kind of has an L shape on each side)
swing clear hinges - ANSWER ✔✔has a special shape that allows
the door to swing 90 degrees or 95 degrees so the full opening of the
doorway is available
definition: latches & locksets - ANSWER ✔✔device to operate a door,
hold in position & lock it
