Virginia Glass and Glazing Qualified Individual Examination

Under 18VAC50-22-30, the official abbreviation for Virginia glass and glazing contracting is:

• AGLZ
• BGLS
• CGGC
• DFEN

Per 18VAC50-22-30, which activity is inside the GLZ specialty?

• AInstallation, assembly, repair, improvement, or removal of glass, mirrored glass, and gla…
• BInstallation of a new building electrical service for storefront lighting
• CRough-in of sanitary waste piping at a storefront sill
• DFraming a new dwelling's structural roof trusses

18VAC50-22-30 states that GLZ work may be installed in:

• AAny structure
• BDwellings and townhouses only
• CCommercial buildings only
• DInterior tenant spaces only

Which related materials does 18VAC50-22-30 expressly include in the GLZ specialty?

• AStandard methods of weatherproofing, caulking, glazing, sealants, and adhesives
• BFire-sprinkler piping and heads
• CPrimary electrical distribution ahead of the meter
• DOn-site sewage drainfields

Besides a GLZ specialty contractor, 18VAC50-22-30 says which licensees also provide the glass-and-glazing function?

• ACBC and RBC classifications and the HIC and CIC specialties
• BELE and PLB classifications only
• CH/H and SPR classifications only
• DNo other classification or specialty may perform GLZ work

A Richmond storefront bid includes removing failed insulating glass, fabricating new aluminum doors, and recaulking the perimeter. Is that package inside GLZ?

• AYes. Removal, fabrication of glazed doors, and standard recaulking are all named in the G…
• BNo. Removal of existing glass is demolition and requires a separate demolition specialty
• CNo. Fabricating doors is finish carpentry (FIN) only
• DNo. Perimeter caulk is painting and wallcovering (PTC) only

Which product is a "glass substitute for glazing" that 18VAC50-22-30 places in the GLZ specialty?

• APolycarbonate or acrylic sheet glazed into a framed opening
• BStructural steel wide-flange columns
• CType L copper water tube
• DAsphalt shingle roofing

A GLZ contractor is asked to install a complete aluminum storefront, glaze the lites, hang the entrance doors, and land the 120-volt feed for the automatic door operator. What is outside GLZ?

• ALanding the 120-volt power feed for the operator
• BSetting the aluminum storefront framing
• CGlazing the insulating lites
• DHanging the glazed entrance doors

Mirrored glass in a hotel corridor is bid as adhesive-set plates with J-mold and edge sealant. Under 18VAC50-22-30, this work is:

• AInside GLZ, which names mirrored glass and the adhesives used to install it
• BInside tile, marble, ceramic, and terrazzo (TMC) only
• CInside painting and wallcovering (PTC) only
• DUnlicensed decorative work that needs no contractor specialty

A Class C firm holds only the GLZ specialty. The owner also wants the firm to build a new three-story wood-framed office shell and then glaze it. Which statement is correct?

• AGLZ covers the glass, frames, sashes, doors, and associated sealants, but not constructio…
• BGLZ automatically includes the entire commercial building classification (CBC)
• CGLZ includes new dwellings but not commercial shells, so the office is allowed if called…
• DAny specialty contractor may construct a new building if glass will be installed later

Compared with annealed glass of the same thickness, fully tempered glass is about:

• AFour times as strong in bending and breaks into small, relatively blunt dice
• BThe same strength and breaks into long dagger-like shards
• CHalf as strong and cannot be used vertically
• DTen times as strong and cannot be heat-treated again

When must holes, notches, and edgework on glass that will be fully tempered be completed?

• ABefore the glass is heat-treated; cutting or drilling tempered glass will shatter it
• BAfter tempering, using a carbide wheel on the jobsite
• CEither before or after tempering if the hole is smaller than 1/2 inch
• DOnly after the lite is glazed, so the frame can be used as a template

Laminated architectural glass is two or more lites bonded with an interlayer, commonly:

• APolyvinyl butyral (PVB) or ionoplast (such as SentryGlas)
• BAsphalt-saturated organic felt
• CType S hydrated lime putty
• DExpanded polystyrene beadboard

The main safety benefit of laminated glass after impact is that it:

• ATends to stay in the opening because the interlayer holds the fragments
• BDices into loose cubes that fall freely from the frame
• CBecomes stronger after it is cracked
• DCan be recut to a new size after a corner chip

A typical insulating glass unit (IGU) consists of:

• ATwo or more lites separated by a spacer containing desiccant and hermetically sealed at t…
• BA single lite with a factory-applied paint film on both faces
• CThree unwelded glass sheets stacked with no seal
• DWired glass with the wire acting as the spacer

Heat-strengthened glass (ASTM C1048 Kind HS) is generally about twice as strong as annealed glass. For human-impact safety glazing it:

• ADoes not by itself meet CPSC 16 CFR 1201 or ANSI Z97.1 safety-glazing performance
• BAlways qualifies as Category II safety glazing without further testing
• CIs interchangeable with fully tempered glass in a swinging door
• DBecomes safety glazing if it is thicker than 1/2 inch

ASTM C1048 requires fully tempered flat glass to have a minimum surface compression of about:

• A10,000 psi (69 MPa)
• B1,000 psi (7 MPa)
• C50,000 psi (345 MPa)
• D500 psi (3.4 MPa)

In a dual-pane IGU, glass surfaces are numbered starting at the outdoors. Surface 2 is:

• AThe cavity face of the outboard lite
• BThe room-side face of the inboard lite
• CThe outdoor weather face
• DThe interlayer plane of a laminated inboard lite

Argon is used in an IGU cavity primarily to:

• ALower the center-of-glass U-factor compared with air at the same gap
• BMake the unit a fire-rated assembly
• CReplace the need for a desiccant in the spacer
• DAllow the unit to be field-cut to size

Fog or condensation permanently visible between the lites of an IGU usually means:

• AThe hermetic edge seal has failed and the unit should be replaced
• BThe room humidifier should be turned up until the fog clears
• CThe spacer desiccant can be recharged by drilling a vent hole on site
• DThe coating was installed on surface 1 and only needs washing

Annealed (ordinary) flat glass is specified under ASTM C1036. Its typical break pattern is:

• ALarge, sharp shards that can cause serious cutting injuries
• BA network of small cubes that pose little cutting hazard
• CA single circular hole with the rest of the lite intact
• DPowdering into dust with no remaining fragments

A low-e coating is used on architectural glass primarily to:

• AReflect long-wave infrared energy and improve the U-factor (and often solar control)
• BMake the glass fully tempered without a furnace
• CReplace the PVB interlayer in a laminated lite
• DProvide the only identification mark required on safety glass

Sputtered (soft-coat) low-e is normally placed:

• AInside the IGU cavity (surface 2 or 3) because the coating is not durable as an exposed w…
• BAlways on surface 1 so rain can wash it
• CPainted onto the aluminum pressure plate instead of the glass
• DOnly on wired glass used in fire doors

Spontaneous breakage of tempered glass in service is most often associated with:

• ANickel sulfide (NiS) inclusions that expand over time; heat-soaking is used to reduce tha…
• BExcess argon pressure that "pops" the lite months later
• CLow-e coatings that continue to temper the glass in sunlight
• DSetting blocks placed at the quarter points

A 1-inch IGU is specified as two 1/4-inch lites and a 1/2-inch air space. For solar-control in a cooling-dominated elevation, the specifier usually wants the low-e coating on:

• ASurface 2, so solar energy is reflected before it enters the building
• BSurface 1, as an exposed exterior hard film on every job
• CBoth exposed faces (1 and 4) so the coating can be recoated in the field
• DThe edge of the spacer bar only

Which statement about wired glass is most accurate for a modern GLZ contractor?

• ATraditional wired glass may be fire-rated but is not automatically impact safety glazing…
• BAny glass with a visible wire mesh always meets CPSC 16 CFR 1201 Category II
• CWired glass may be field-cut after full tempering just like annealed glass
• DThe wire mesh replaces the need for setting blocks

In aluminum framing, the vertical members that run from sill to head are called:

• AMullions
• BTransoms
• CWeeps
• DPressure-plate cover caps only

A conventional aluminum storefront is best described as:

• AA one- or two-story, non-load-bearing glazed wall that typically sits on the slab in a si…
• BA multi-story wall hung outside the floor slabs that carries gravity loads from the floor…
• CA load-bearing masonry wall with punched windows
• DA roof skylight curb only

Curtain wall differs from storefront because curtain wall typically:

• AHangs from the building structure, bypasses floor slabs, and does not carry floor gravity…
• BMust be wood-framed and limited to one lite
• CIs always load-bearing and replaces the steel columns
• DCan only be used on dwellings

In a captured (pressure-plate) curtain wall, the exterior metal that clamps the glass and is then hidden by a snap cover is the:

• APressure plate
• BThermal break only, with no mechanical role
• CSetting block
• DDesiccant matrix

Stick-built curtain wall is assembled:

• APiece by piece on the building from stock-length mullions, horizontals, and field-set gla…
• BOnly as factory-sealed four-side structural units that are never anchored on site
• CExclusively from wood stop-glazed sashes
• DBy pouring aluminum in place at each floor

Unitized curtain wall is best characterized as:

• AFactory-assembled modules, often one floor tall, hoisted and stacked on site
• BOnly field-cut storefront tube with no shop work
• CA masonry cavity wall with brick ties
• DInterior borrowed-lite frames

A storefront sill receptor (subsill) should be installed with end dams and weeps so that:

• AWater that enters the glazing pocket is collected and drained to the exterior instead of…
• BThe receptor can be used as a structural beam for the second floor
• CArgon can be field-charged into each lite
• DInterior drywall can be glued directly to the glass

A thermal break in an aluminum mullion is provided to:

• AInterrupt the aluminum heat path and improve condensation resistance and U-factor
• BIncrease the dead-load capacity of the glass
• CReplace setting blocks under insulating units
• DAllow the mullion to be welded to the steel column

Glass bite is:

• AThe depth of glass edge captured in the frame pocket or by the structural silicone
• BThe gap between the glass edge and the bottom of the pocket
• CThe visible sightline width of the cover cap
• DThe thickness of the low-e coating

Industry glazing practice (GANA/FGIA) places two setting blocks for a rectangular lite:

• AAt the quarter points of the sill (about one-fourth of the width in from each jamb)
• BStacked together at one corner so water can drain the other side
• COnly at the head, with the sill left unsupported
• DContinuously along the full sill with no gaps for weeps

A pressure-equalized rainscreen curtain wall is designed so that:

• AThe cavity behind the outer seals can equalize with exterior wind pressure, reducing the…
• BThe interior is kept at a permanent 50 psi positive pressure
• CNo weeps are ever provided because the wall is face-sealed for life
• DAll glass must be installed from the interior only

Four-sided structural silicone glazing (SSG) means:

• AThe glass is retained on all four edges by structural silicone, with little or no exterio…
• BThe lite is held only by setting blocks and gravity
• CThe unit is dry-glazed with four independent pressure plates and no silicone
• DThe glass is bolted through four holes drilled after tempering

A 12-foot-tall curtain-wall mullion is specified for a maximum live-load deflection of L/175. The allowable deflection is closest to:

• A0.82 inch
• B0.25 inch
• C2.00 inches
• D6.00 inches

On a unitized curtain-wall stack joint, the most important weather-seal concept is:

• AA two-line (or more) seal with a drained, pressure-equalized cavity and continuity of the…
• BA single interior latex caulk bead with no exterior seal
• CLeaving a 2-inch open gap so the wall can "breathe" without gaskets
• DWelding adjacent aluminum units into one continuous tube

A casement window is hinged and typically:

• AHinged at the side and swings outward (or inward) like a door
• BHinged at the top and projects out at the bottom (awning)
• CHinged at the bottom and opens inward at the top (hopper)
• DHas two vertically sliding sashes in a hung frame

In a double-hung window:

• ABoth the upper and lower sashes slide vertically
• BOnly the lower sash moves and the upper sash is fixed (that is single-hung)
• CBoth sashes project outward on scissor arms
• DThe sash rotates 360 degrees on a center pivot only

The operable framed unit that holds the glass in a hung or casement window is the:

• ASash
• BSill pan only
• CMuntin grid applied to the room side of a fixed lite
• DNailing flange

An NFRC temporary label on a fenestration product is used in the field to confirm:

• ARated U-factor, SHGC, and visible transmittance for the whole product
• BThat the glass was tempered in Virginia
• CThe OSHA load rating of the delivery crate
• DThe exact IBC hazardous-location section number

A storefront entrance with a narrow-stile aluminum door typically uses which glass in the door leaf?

• AFully tempered glass, commonly 1/4 inch, because a door is a hazardous location
• BAnnealed 1/8-inch picture glass
• CHeat-strengthened glass with no safety rating
• DUnlabeled wired glass as the default

Weep holes in a window or storefront sill are provided to:

• ADrain water from the glazing pocket or frame cavities to the exterior
• BEqualize indoor humidity with the IGU cavity
• CProvide a path for argon to escape so the unit can breathe
• DAnchor the frame to the rough opening

A window rough opening should be flashed with a sill pan or equivalent pan flashing so that:

• AWater that gets past the window frame is directed onto the weather-resistive barrier and…
• BThe pan can replace the window's own weatherstripping
• CInterior drywall becomes the primary weather plane
• DThe installer can omit shims and sealant