Arizona ROC CR-65 Glazing Examination

During flat glass manufacturing via the float process, molten glass is floated on a bath of molten metal to create uniform thickness and high optical clarity. Which metal is utilized in the float bath, and which side of the finished glass retains trace elements of this metal?

• AMolten lead; atmosphere side
• BMolten tin; tin side (bottom surface in contact with the bath)
• CMolten zinc; float side
• DMolten aluminum; top surface

According to ASTM C1048 and the GANA Glazing Manual, what is the required surface compression range for heat-strengthened (HS) glass?

• A1,500 psi to 3,000 psi
• B3,500 psi to 7,500 psi
• C10,000 psi to 15,000 psi
• DGreater than 20,000 psi

What minimum surface compression rating must fully tempered (FT) glass meet under ASTM C1048 to qualify as safety glazing?

• A3,500 psi
• B5,000 psi
• C10,000 psi
• D16,000 psi

Annealed float glass can fracture when subjected to a sudden temperature differential across its surface of approximately 75°F (24°C). What temperature differential can fully tempered glass withstand without thermal shock failure?

• A100°F to 125°F
• B150°F to 200°F
• C400°F to 500°F
• D800°F to 1,000°F

Spontaneous breakage occurring months or years after installation in fully tempered glass installed on building facades is most frequently caused by which microscopic contaminant inclusion?

• AFerrous oxide (Fe2O3)
• BNickel Sulfide (NiS)
• CSodium silicate crystals
• DCalcium carbonate nodules

Which interlayer material offers significantly higher stiffness and structural load-bearing capacity than standard Polyvinyl Butyral (PVB), making it preferred for open-edge glass railings and overhead glass canopies?

• AStandard Polyethylene (PE) film
• BSentryGlas (Ionoplast / SGP interlayer)
• CEthylene Vinyl Acetate (EVA)
• DLiquid Cast Acrylic resin

In a dual-pane Insulating Glass Unit (IGU) installed in a hot, cooling-dominated desert climate like Phoenix, Arizona, on which glass surface should a solar-control Low-E coating ideally be placed to minimize solar heat gain?

• ASurface #1 (exterior face of outer lite)
• BSurface #2 (interior face of outer lite)
• CSurface #3 (exterior face of inner lite)
• DSurface #4 (interior face of inner lite)

Commercial dual-sealed Insulating Glass Units (IGUs) utilize two distinct sealants around the perimeter spacer bar. What is the primary function of the polyisobutylene (PIB) primary seal vs. the secondary silicone seal?

• APIB provides structural strength; silicone provides moisture barrier
• BPIB serves as the moisture vapor barrier and gas seal; silicone provides structural adhes…
• CPIB cushions setting blocks; silicone prevents glass-to-glass contact
• DPIB is decorative black tape; silicone is the sole functional seal

Per the GANA Glazing Manual, what is the minimum recommended air space clearance between the back of opacified spandrel glass and the face of building insulation to prevent severe heat trap and thermal fracture?

• A1/4 inch (6 mm)
• B1/2 inch (12 mm)
• C2 inches (50 mm)
• D6 inches (150 mm)

Prior to heat tempering or laminating glass, why is it mandatory to perform edge seaming or grinding on cut float glass?

• ATo increase light transmission through glass edges
• BTo remove sharp micro-cracks, nicks, and score vents that cause thermal stress breakage i…
• CTo reduce glass thickness to fit standard frame stops
• DTo create a rough surface for structural silicone adhesion

Why has traditional polished wired glass been largely removed from safety glazing permissions in modern building codes (IBC Chapter 24)?

• AWired glass corrodes rapidly in dry Arizona climates
• BThe embedded wire mesh weakens the glass matrix, causing it to fail impact safety tests (…
• CWired glass cannot be manufactured in thicknesses greater than 1/8 inch
• DWired glass blocks radio frequency emergency communications

When scoring and cutting patterned or rolled glass in the shop or field, on which surface must the glass cutter wheel be applied?

• AOn the textured/patterned side
• BOn the smooth, flat side
• CEqually on both sides simultaneously
• DPatterned glass cannot be scored with a cutter wheel

Photocatalytic self-cleaning glass utilizes a thin microscopic coating of titanium dioxide (TiO2). What two environmental elements are required to activate its self-cleaning action?

• AUltraviolet (UV) sunlight and water (rain)
• BInfrared radiation and wind velocity
• CAmbient humidity and electrical current
• DDirect shadows and ozone gas

An optical phenomenon known as anisotropy (or strain pattern / quench marks) is sometimes visible in heat-treated glass under certain natural lighting conditions. What causes this visual pattern?

• ASurface dirt accumulation inside the tempering furnace
• BLocalized stress differentials created by air nozzles during rapid quench cooling, viewed…
• CDelamination of internal PVB plastic interlayers
• DChemical etching from alkaline cleaning solutions

Why must glazers consider ambient operating temperature when designing structural laminated glass subjected to long-duration dead loads in warm desert regions like Arizona?

• APVB interlayers experience visco-elastic creep and shear modulus reduction at elevated te…
• BGlass expands by more than 10% in linear length above 100°F
• CHeat causes annealed glass to convert back into liquid silica
• DLaminated glass interlayers absorb solar UV and expand permanently by 2 inches

According to IBC Section 2406.4.1, which of the following door installations ALWAYS requires safety glazing regardless of pane surface area?

• AFixed transom window positioned 8 feet above the floor
• BSwinging, sliding, bi-fold, and storm doors
• CHigh-ribbed solid wooden exterior doors
• DGlazing in fixed exterior soffits

Under IBC 2406.4.2, glazing in a fixed wall panel adjacent to a door (sidelite) is considered a hazardous location requiring safety glazing if the nearest edge of the glazing is within how many inches of the door frame and the bottom edge is less than 60 inches above the floor?

• A12 inches
• B24 inches
• C36 inches
• D48 inches

Glazing in fixed or operable window panels (not adjacent to doors) MUST be safety glazing if it meets ALL four IBC 2406.4.3 conditions. Which of the following correctly states these four criteria?

• AArea greater than 3 sq ft, bottom less than 12 inches AFF, top greater than 24 inches AFF…
• BArea greater than 9 sq ft, bottom edge less than 18 inches AFF, top edge greater than 36…
• CArea greater than 15 sq ft, bottom edge less than 24 inches AFF, top edge greater than 48…
• DArea greater than 20 sq ft, bottom edge less than 30 inches AFF, top edge greater than 60…

An exception in IBC 2406.4.3 allows annealed glass to remain in a low-lying window location that meets all 4 hazard conditions if a protective horizontal crash rail is installed across the glazing. What are the load and dimension requirements for this protective bar?

• ABar width 1 inch, mounted 20 inches AFF, withstands 10 lb point load
• BBar height 1-1/2 inches minimum, mounted 34 to 38 inches AFF, capable of withstanding a 5…
• CBar height 3 inches, mounted 42 inches AFF, withstands 200 lb load
• DBar height 6 inches, mounted 12 inches AFF, withstands 100 lb load

Under IBC 2406.4.5, glazing in walls, enclosures, or fences surrounding swimming pools, hot tubs, saunas, bathtubs, and showers MUST be safety glazing if the bottom edge of the glass is within what distance above the standing/walking surface?

• AWithin 36 inches (914 mm)
• BWithin 48 inches (1,219 mm)
• CWithin 60 inches (1,524 mm)
• DWithin 72 inches (1,829 mm)

Glazing adjacent to stairways, stair landings, and ramps is classified as a hazardous location under IBC 2406.4.6 if the bottom edge of the glass is less than 36 inches above the walking surface and within what horizontal distance of the walkway or stair tread?

• AWithin 24 inches (610 mm)
• BWithin 36 inches (914 mm)
• CWithin 60 inches (1,524 mm) horizontally from any point of the stair, landing, or ramp
• DWithin 84 inches (2,133 mm)

Under federal safety standard CPSC 16 CFR 1201, what drop heights and impact energy levels distinguish Category I from Category II impact testing?

• ACat I = 6-inch drop (50 ft-lb); Cat II = 12-inch drop (100 ft-lb)
• BCat I = 18-inch drop (150 ft-lb); Cat II = 48-inch drop (400 ft-lb)
• CCat I = 24-inch drop (200 ft-lb); Cat II = 36-inch drop (300 ft-lb)
• DCat I = 36-inch drop (300 ft-lb); Cat II = 60-inch drop (500 ft-lb)

ANSI Z97.1 classifies safety glazing into Class A, Class B, and Class C. Which impact drop height corresponds to Class A performance?

• A12 inches (100 ft-lb)
• B18 inches (150 ft-lb)
• C48 inches (400 ft-lb)
• D60 inches (500 ft-lb)

Per IBC Section 2407.1.1, structural glass balusters and handrail panels must be designed using what safety factor when calculating applied wind and live load resistance?

• ASafety factor of 1.5
• BSafety factor of 2.0
• CSafety factor of 3.0
• DSafety factor of 4.0

Under IBC 2407.1.2, a continuous top rail is generally required on glass balustrade guardrails. What exception permits omitting the top rail?

• AMonolithic 1/4-inch annealed glass is installed
• BLaminated glass composed of two or more lites of equal thickness is used and approved by…
• CThe guardrail height is increased to 60 inches
• DAcrylic plastic glazing is substituted for glass

Per IBC Section 2406.3, how must each pane of safety glazing installed in a hazardous location be permanently identified?

• AWith a paper sticker applied to the center of the lite that can be peeled off after inspe…
• BWith a permanent acid-etched, sandblasted, ceramic-fired, or embossed logo/bug indicating…
• CWith a handwritten marker notation on the frame mullion
• DWith a digital QR code printed on the shipping crate

A glazer arrives on a jobsite and finds a fully tempered glass door lite is 1/2 inch too wide. Why is field cutting, trimming, or drilling fully tempered glass prohibited?

• AIt voids the 1-year glass supplier warranty
• BPenetrating the outer surface compression layer releases stored internal tension, causing…
• CCutting tempered glass requires 48 hours of continuous diamond wheel cutting
• DField cutting produces toxic lead dust forbidden by OSHA

Glazing in athletic facilities such as squash courts, racquetball courts, and basketball court perimeter walls must meet which specific IBC Chapter 24 impact requirement?

• ACPSC 16 CFR 1201 Category I or II impact testing plus specialized structural deflection a…
• BStandard 1/4-inch annealed glass with safety film
• CWire glass meeting NFPA 80 fire ratings
• DDouble-pane glass filled with argon gas

Under IBC Section 2409, glass installed in elevator hoistways and elevator car enclosures MUST be constructed of which glass type?

• AMonolithic 3/8-inch annealed glass
• BLaminated glass conforming to CPSC 16 CFR 1201 Category II
• C3/4-inch acrylic plastic sheet
• DSingle-pane wire glass

Per IBC Section 716 and NFPA 80, what is the maximum allowable vision panel glass area in a 60-minute or 90-minute fire-rated door when using fire-protective glazing?

• A100 square inches (0.065 m2)
• B500 square inches
• C1,296 square inches
• DUnlimited size

What is the key structural distinction between a commercial aluminum storefront framing system and an architectural curtain wall framing system?

• AStorefront framing carries roof loads; curtain wall framing carries floor loads
• BStorefront systems are ground-supported single or multi-story framing (typically up to 10…
• CStorefront systems never contain glass; curtain wall systems contain only glass
• DStorefront systems use steel framing; curtain walls use vinyl framing

Which curtain wall construction method involves fabricating and glazing entire framed wall panels in a controlled factory setting prior to hoisting them onto the building structure?

• AStick curtain wall system
• BUnitized curtain wall system
• CStructural butt-glazed storefront system
• DField-assembled ribbon window system

When installing pressure plates on a stick curtain wall system, why must a calibrated torque wrench be used to tighten pressure plate screws to manufacturer specifications (typically 30 to 50 in-lbs)?

• AOver-torqueing crushes perimeter gaskets and glass edges; under-torqueing causes water le…
• BTorqueing prevents thermal expansion of aluminum mullions
• CTorque specs dictate the curing speed of perimeter silicone
• DProper torque eliminates the need for setting blocks

Where must weep slots or weep holes be located in horizontal pressure plates and beauty caps of pressure-equalized curtain wall systems to ensure proper drainage?

• AAt the exact center of every vertical mullion
• BAt both ends of horizontal pressure plates, directly above setting blocks or zone dam fla…
• COnly along the top horizontal header of the building roof
• DWeep holes are never installed in exterior pressure plates

Commercial aluminum framing installed in desert environments like Arizona incorporates thermal breaks. What is the primary purpose of a thermal break, and what materials are commonly used?

• ATo increase electrical conductivity; copper wires
• BTo separate interior and exterior aluminum extrusions with low-conductivity materials (po…
• CTo eliminate expansion joints; solid steel rods
• DTo absorb sound; fiberglass insulation batts

Vertical mullions in multi-story stick curtain walls must incorporate expansion joints (sleeve splices). What two primary physical movements do these expansion joints accommodate?

• AGlass solar reflectance and chemical sealant shrinkage
• BThermal expansion/contraction of aluminum and structural building floor deflection (inter…
• CFoundation settling and wind direction changes
• DGlass thickness variations and hardware weight

Curtain wall framing anchors attached to building floor slabs are categorized as dead-load anchors or wind-load (expansion) anchors. How do their functions differ?

• ADead-load anchors carry vertical gravity weight only; wind-load anchors carry lateral win…
• BDead-load anchors are temporary; wind-load anchors are permanent
• CDead-load anchors carry wind pressure; wind-load anchors support glass weight
• DDead-load anchors are made of plastic; wind-load anchors are made of timber

An architectural aluminum vertical mullion is 20 feet (240 inches) long. The coefficient of thermal expansion for extruded aluminum is 0.0000128 in/in/°F. If the mullion experiences a temperature change of 100°F between winter night and summer day in Arizona, what is the total change in mullion length?

• A0.076 inches
• B0.154 inches
• C0.307 inches
• D0.614 inches

In storefront aluminum framing, what is the term for the nominal depth that the glass edge extends into the framing pocket past the stop edge?

• AFace clearance
• BGlass bite (or edge cover)
• CPocket depth
• DSightline

When framing a 90-degree building corner in a commercial storefront system, why are specialized corner mullions (such as 90-degree shear block or corner assemblies) installed instead of standard intermediate mullions?

• AStandard intermediate mullions cannot accept glass glazing pockets from two perpendicular…
• BCorner mullions cost 90% less than intermediate mullions
• CCorner mullions eliminate the need for glass safety seals
• DBuilding codes forbid glass within 5 feet of corners

Which two ASTM standards govern laboratory and field testing for air leakage and static pressure water penetration of exterior curtain walls and storefronts?

• AASTM C1036 and ASTM C1048
• BASTM E283 (Air Leakage) and ASTM E331 (Static Water Penetration)
• CASTM E119 and ASTM E84
• DASTM D412 and ASTM D624

During dynamic field water testing of curtain walls per AAMA 501.1, what equipment is used to simulate wind-driven rain against the wall assembly?

• AA handheld garden hose spray nozzle at 5 psi
• BAn aircraft engine propeller (or high-velocity wind generator) paired with a calibrated w…
• CA high-pressure ultrasonic fog generator
• DA static water immersion tank

Why must continuous aluminum sill starter channels or sill pans incorporate folded end dams at framing terminations?

• ATo prevent internal water collected by the sill track from draining sideways into adjacen…
• BTo increase vertical load resistance under heavy glass doors
• CTo hold setting blocks in position during glass loading
• DEnd dams are decorative caps used for visual trim

Which AAMA testing procedure evaluates the ability of a curtain wall system to withstand seismic interstory horizontal displacement without glass fall-out?

• AAAMA 501.1
• BAAMA 501.4
• CAAMA 611
• DAAMA 2605

In hot desert building energy codes (such as Arizona energy standards based on IECC), storefront windows are specified by U-factor and Solar Heat Gain Coefficient (SHGC). What does a lower SHGC rating signify?

• AThe window transmits more solar heat into the building
• BThe window admits less solar radiation heat gain, reducing air conditioning cooling loads
• CThe window framing has lower structural strength
• DThe glass has higher visible light reflection

Per the GANA Glazing Manual, what is the mandatory Shore A durometer hardness range for setting blocks supporting heavy glass lites in framing pockets?

• A30 to 40 Durometer Shore A
• B50 to 60 Durometer Shore A
• C80 to 90 Durometer Shore A (± 5)
• D110 to 120 Durometer Shore A

What is the standard GANA placement rule for locating two setting blocks along the bottom edge of a rectangular glass lite in a horizontal frame member?

• AAt the extreme bottom corners (0 inches from corners)
• BAt quarter points (1/4 of total glass width from each vertical corner), or minimum 6 inch…
• CAt the exact center touching each other
• DOne block at the left corner, one at the top header