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NCIDQ IDFX EXAM STUDY GUIDE
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NCIDQ IDFX EXAM STUDY GUIDE
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NCIDQ IDFX EXAM STUDY GUIDEAdvantages of Gypsum Drywall - Answers- 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 - Answers- 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
swing clear hinges - Answers- 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 - Answers- device to operate a door, hold in position &
lock it
latchset - Answers- ONLY holds door in place; NO lock (i.e. restroom partitions)
lockset - Answers- special mechanism that allows the door to be locked with a KEY or
THUMBTURN
mortise lockset - Answers- installed in rectangular area cut out of door; more SECURE
than cylindrical and offers wider variety of locking options
cylindrical - Answers- most common; simple to install in holes drilled into door, relatively
inexpensive, most common in residential (like doors in home bedroom)
pre-assembled - Answers- rectangular box that fits within a notch cut in the edge of the
door; easier to install than mortise; door knob OR lever can be used
center hung pivot - Answers- allow door to swing in either direction & is completely
concealed
pivots CANNOT be used with a door stop (instead use a flexible strip of wool pile or
synthetic stripping can be rabbeted into the edge of the door) on the same side of the
door with both jambs because it makes it difficult to seal the door against sound or light
transmission on the hinge and strike sides
closers - Answers- automatically return a door to its closed position after it is opened
control the DISTANCE a door can be OPENED & thereby protect the door and the
surrounding construction from damage
,door coordinator - Answers- device that coordinates the closing sequence of the two
doors so that they close completely, rather than having the leaf with the astagral close
first and prevent the other leaf from closing
intumescent gasketing - Answers- cannot be used alone; expands upon exposure to
heat and forms a tight, fire-resistant seal against the passage of smoke, gases, and
heat
Fire rated glazing - Answers- -wired: mesh of wire embedded in the middle of the sheet;
NOT tempered & doesn't qualify as safety glazing for hazardous locations
-tempered, fire protective glass
-glass block
glazing beads - Answers- used to hold the glass in place
framing glass - Answers- glass set in small channel or angle frames at the top and
bottom and simply butt-joined on sides
Fire Rated Doors - Answers- 1-hr rated exit access corridor or where a smoke & draft
assembly is acquired: 20 minutes door rated
occupancy separation: 3/4-hr door rated
1 hr rated exit stair enclosure: 1 hr door rated
2 hr rated exit stair enclosure: 1 1/2 hr door rated
integrated ceilings - Answers- suspended ceiling system specifically designed to
accommodate acoustical ceiling tile, light fixtures, supply & return air grilles, fire
sprinklers and partition attachment in a CONSISTENT, UNIFIED way
all proprietary systems intended to be used in commercial applications where the
partition lights & other elements connected to the ceiling change FREQUENTLY
all components designed for max. REUSABILITY & FLEXIBILITY
stainless steel - Answers- used for its corrosion resistance, strength & appearance
brass & bronze - Answers- predominantly copper
in practical use, many alloys that are really brass are referred to as bronze
although corrosion resistant, it changes color with age & exposure to moisture in the air
,finish carpentry - Answers- exposed wood construction assembled AT THE JOB SITE
(i.e. doors & windows, door & window trim, standard wood base & other molding, site-
built stairs & handrails)
Levels of Gypsum Drywall - Answers- 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? - Answers- residential: 16" O.C.
commercial: 24" O.C.
Slip Joint - Answers- prevent wall from being damaged if the structural floor deflects
Plaster Construction - Answers- 1. Scratch Coat
2. Brown Coat (level surface)
3. Finish Coat (Leveling & desired texture)
*Add Trim
Masonry Block Dimensions - Answers- 8"x8"x16" (-3/8" for mortar joints)
Demountable Partitions - Answers- 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 - Answers- 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)
Types of Hinge Tips - Answers- -flat button (most common; typical)
-hospital
-oval head (typical)
-steeple
-flush
, Butt Hinge - Answers- 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 - Answers- 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)
architectural woodwork - Answers- CUSTOM, SHOP-fabricated millwork built of lumber,
finished wood & other materials
Finish carpentry grade - Answers- determines the type & number of allowable defects
-B & better: excellent for natural finishes/paint (supply limited)
-C select: slightly more defects & usually best grade to specify for painting & some
natural finishes
vertical grain: tends to warp less, more abrasion resistant, stain more uniformly, cut so
annual growth rings are PERPENDICULAR to face of board
plywood - Answers- -made from an odd # of layers of thin veneer glued together under
heat & pressure
-used in FINISH carpentry (door trims, etc.)
particleboard - Answers- -composed of small wood particles, fibers, and CHIPS of
various sizes mixed together in a binder and formed under pressure into a panel
-commonly used as a SUBSTRATE for natural and laminate veneers in architectural
woodwork construction (i.e. casework not built on site)
-most common, dimensionally stable; smooth surface; impact resistance
MDF - Answers- -made from wood particles REDUCED to fibers (fluff) in a moderate-
pressure stream vessel and then combined with a resin and bonded together under
heat and pressure
-most DIMENSIONALLY STABLE
-used for painting, thin overlay materials, veneers and high pressure decorative
laminate, shelving, molding, and furniture
Stairs - Answers- -step: portion of egress achieving a change in elevation by means of
a SINGLE riser
-stairway: a change in elevation having 2 OR MORE risers
winding vs. curved stairway - Answers- -winding: tapered treads that are wider at one
end than the other
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