California CSLB C-23 Ornamental Metal Examination

A contractor is estimating the total weight for a decorative fence requiring 40 solid steel bars, each 1/2 inch square and 5 feet long. Given that steel weighs approximately 0.85 lbs per linear foot for 1/2-inch solid square stock, what is the total weight of the bar stock before accounting for waste?

• AA total weight of 170.0 pounds
• BA total weight of 145.0 pounds
• CA total weight of 210.0 pounds
• DA total weight of 255.0 pounds

An estimator is laying out a guard railing with a clear opening length of 140 inches between end posts. If the decorative pickets are 1/2 inch square solid steel bars, what is the MINIMUM number of pickets required to ensure no opening allows passage of a 4-inch sphere as required by the building code?

• AExactly 28 decorative pickets
• BExactly 34 decorative pickets
• CExactly 31 decorative pickets
• DExactly 38 decorative pickets

A custom ornamental metal staircase has a total rise of 108 inches and a total run of 144 inches. What is the slope angle (pitch) of the stair stringer to the nearest degree?

• AA slope angle of 31 degrees
• BA slope angle of 37 degrees
• CA slope angle of 43 degrees
• DA slope angle of 48 degrees

An estimator is ordering structural steel tubing (HSS 2" x 2" x 3/16") for a commercial guardrail job requiring 120 linear feet. If HSS 2x2x3/16 steel tube weighs 4.32 lbs per foot, what total weight should be budgeted including a 10% scrap/waste factor?

• AA total weight of 466 lbs
• BA total weight of 518 lbs
• CA total weight of 622 lbs
• DA total weight of 570 lbs

On an architectural shop drawing for a decorative canopy, a weld symbol shows a triangular fillet weld symbol located BELOW the reference line. According to AWS A2.4 standard welding symbols, where must this weld be performed?

• AOn the far side of the joint
• BAll around the joint perimeter
• CIn the field during final assembly
• DOn the arrow side of the joint

A contractor is estimating a 200-foot continuous exterior aluminum handrail installation. If the ambient temperature varies by 80°F over the year and aluminum has a thermal expansion coefficient of 12.8 x 10^-6 in/in/°F, what total linear thermal expansion must be accommodated across the entire rail length?

• AApproximately 1.23 inches
• BApproximately 2.46 inches
• CApproximately 3.69 inches
• DApproximately 4.92 inches

According to the California Building Code, what minimum concentrated load applied in any direction at the top rail must a commercial guardrail system be designed to resist?

• AA concentrated load of 200 pounds
• BA concentrated load of 150 pounds
• CA concentrated load of 250 pounds
• DA concentrated load of 300 pounds

According to CBC Chapter 16, what minimum uniform load applied horizontally along the top rail must be included in structural calculations for a commercial guardrail system?

• AA uniform load of 25 PLF
• BA uniform load of 35 PLF
• CA uniform load of 50 PLF
• DA uniform load of 75 PLF

An ornamental metal fabricator is bidding on brass/bronze decorative entrance plaques. Bronze (C36000) weighs approximately 0.307 lbs per cubic inch. What is the total weight of a 1/2-inch thick bronze plate measuring 24 inches by 36 inches?

• AA total weight of 105.4 lbs
• BA total weight of 132.6 lbs
• CA total weight of 158.8 lbs
• DA total weight of 184.2 lbs

According to National Ornamental & Miscellaneous Metals Association (NOMMA) Voluntary Joint Standards, which finish designation refers to a commercially smooth finish with welds ground smooth and flush?

• ANOMMA Finish Class 1
• BNOMMA Finish Class 3
• CNOMMA Finish Class 4
• DNOMMA Finish Class 2

Under the building code and ADA guidelines, how far must a handrail extend horizontally beyond the top riser of a stair flight?

• AAt least 6 inches horizontally
• BAt least 18 inches horizontally
• CAt least 24 inches horizontally
• DAt least 12 inches horizontally

According to the building code, at the bottom of a stair flight, how must the handrail extend beyond the bottom tread nosing?

• AHorizontally for 12 inches at top-rail height
• BVertically down to the landing floor level
• CSloped for 1 tread depth, then 12 inches
• DCurved inward in a continuous 180-degree loop

A contractor is estimating SMAW stick electrode requirements for a heavy ornamental iron gate project requiring 15 lbs of deposited weld metal. Assuming E7018 electrodes have a deposition efficiency of approximately 65%, how many pounds of electrodes must be purchased?

• AApproximately 18.2 lbs
• BApproximately 20.5 lbs
• CApproximately 23.1 lbs
• DApproximately 28.6 lbs

When estimating hot-dip galvanizing costs per ASTM A123 for structural steel assemblies, what percentage is typically added to the bare steel weight to account for the zinc coating weight gain?

• AApproximately 1.0% to 1.5%
• BApproximately 10% to 12%
• CApproximately 7.5% to 9.0%
• DApproximately 3.5% to 5.0%

An estimator is planning a decorative spiral staircase with a total vertical floor-to-floor rise of 114 inches. If the building code limits maximum riser height to 7.75 inches for commercial stairs, what is the MINIMUM number of risers required?

• AA minimum of 15 risers
• BA minimum of 13 risers
• CA minimum of 17 risers
• DA minimum of 19 risers

A shop estimator uses a productivity rate of 1.5 shop labor hours per linear foot to fabricate intricate wrought iron balcony railings. How many total shop labor hours should be budgeted for a 60-linear-foot balcony job?

• AA total of 75 labor hours
• BA total of 90 labor hours
• CA total of 105 labor hours
• DA total of 120 labor hours

On an architectural elevation drawn at a scale of 1/4" = 1'-0", a dimensioned gate opening measures 3.25 inches on the blueprint with a ruler. What is the actual field width of the gate opening?

• AAn actual width of 13 feet 0 inches
• BAn actual width of 11 feet 6 inches
• CAn actual width of 14 feet 6 inches
• DAn actual width of 16 feet 0 inches

When preparing shop drawings for architect approval on a public works project, which detail MUST be included according to standard AISC/NOMMA submittal guidelines?

• AThe hourly wage rates of shop welders
• BMember sizes, connection details, and welds
• CThe chemical composition of paint thinners
• DThe manufacturer serial numbers of shop tools

Under the building code, when structural glass balustrade panels are specified as the guardrail infill without a continuous top rail, what glass safety type and load factor must be accounted for during planning?

• AAnnealed glass with a 1.5 safety factor
• BStandard wired glass with a 2.0 safety factor
• CLaminated tempered glass with a 4.0 safety factor
• DSingle-pane acrylic sheet with a 3.0 safety factor

When estimating exterior decorative metal features for an oceanfront resort project in California, which stainless steel alloy should be specified to prevent pitting corrosion from airborne chlorides?

• AType 410 martensitic stainless steel
• BType 304 austenitic stainless steel
• CType 430 ferritic stainless steel
• DType 316 austenitic stainless steel

An estimator is selecting post-installed wedge anchors to secure 4x4 ornamental railing posts into 3,000 PSI concrete. According to standard ACI 318 embedment guidelines, what is the standard minimum embedment depth for 1/2-inch diameter expansion anchors?

• AA minimum embedment of 1.0 inch
• BA minimum total embedment of 1.5 inches
• CA minimum embedment of 4.5 inches
• DA minimum embedment of 2.25 inches

When fabricating complex scrollwork and hand-bent ornamental iron scrolls from flat bar, what material waste percentage is typically added to linear estimates to account for crop ends and bending deformation?

• AA waste factor of 2% to 3%
• BA waste factor of 5% to 7%
• CA waste factor of 12% to 15%
• DA waste factor of 25% to 30%

When reading architectural specifications, what distinction between architectural bronze (C38500) and commercial bronze (C22000) must an estimator note regarding material properties?

• AArchitectural bronze contains 99% pure copper
• BArchitectural bronze is a leaded brass alloy
• CCommercial bronze cannot be soldered or brazed
• DArchitectural bronze is magnetic and rusts rapidly

According to AWS D1.1, when welding ASTM A36 structural steel tubing with a thickness of 3/4 inch using SMAW at ambient temperatures below 32°F (0°C), what preheat requirement must be met?

• APreheat the base metal to at least 70°F
• BPreheat the base metal to at least 300°F
• CPreheat is forbidden for ASTM A36 steel
• DPreheat the base metal to at least 500°F

When welding a 20-foot continuous top rail channel to vertical balusters, which fabrication technique is MOST effective for preventing progressive longitudinal distortion and bowing?

• AWelding continuously from one end to the other
• BUsing a back-step and staggered welding sequence
• CApplying maximum amperage heat without clamping
• DQuenching each weld joint immediately with cold water

According to AWS D1.2 for structural aluminum fabrication, which shielding gas is standard for GTAW (TIG) welding of 6061-T6 aluminum handrails under 1/4 inch thick?

• A100% Carbon Dioxide (CO2)
• B75% Argon and 25% Carbon Dioxide
• C100% Nitrogen gas
• D100% Welding Grade Argon

According to AWS D1.1 structural welding code, why is GMAW Short-Circuit Transfer (GMAW-S) restricted or subject to qualification testing on structural joints thicker than 3/16 inch?

• AHigh risk of incomplete fusion and cold lap defects
• BExcessive heat input that melts through structural tubing
• CRequirement for 100% helium shielding gas mixtures
• DInability to weld in the flat overhead position

When cold-forming 6061-T6 aluminum sheet metal panels for decorative infill, what minimum inside bend radius relative to material thickness (t) is required to prevent outer surface cracking?

• ASharp 90-degree zero radius (0t)
• BInside radius of 0.5 times thickness (0.5t) only
• CInside radius of 3 to 4 times thickness (3t-4t)
• DInside radius of 10.0 times thickness (10t)

What is the optimal temperature forging range when hot-bending and shaping ASTM A36 mild steel ornamental scrolls in a blacksmith forge?

• A700°F to 900°F (Dull Black Heat)
• B1,100°F to 1,300°F (Low Red Heat)
• C1,800°F to 2,200°F (Yellow Heat)
• D2,600°F to 2,800°F (White Liquid Heat)

When welding 304 stainless steel ornamental brackets to A36 carbon steel structural posts, which filler metal electrode is recommended by AWS to prevent weld cracking and dilution issues?

• AER309L filler metal
• BER70S-6 filler metal
• CER308L filler metal
• DER4043 filler metal

According to AWS D1.1, what standard bevel angle is specified for a single-V groove joint prep on 3/8-inch carbon steel plate welded with SMAW?

• AIncluded angle of 15 to 20 degrees
• BIncluded angle of 30 to 35 degrees
• CIncluded angle of 45 to 50 degrees
• DIncluded angle of 60 degrees

When cold-forming heavy architectural brass scrollwork that work-hardens and becomes brittle, what process must be performed to restore ductility?

• AQuenching in ice water from 1,800°F
• BHeating to 800°F-1,100°F and air or water cooling
• CStress-relieving in a freezer at -40°F
• DCase hardening with carbon powder packing treatment

A fabricator is rolling a 1-1/2" x 1-1/2" x 3/16" steel angle into a 36-inch inside diameter circle leg-out. To calculate the flat stock cut length before rolling, at what line is the circumference calculated?

• AAt the neutral axis of the cross section
• BAt the extreme outer toe of the angle leg
• CAt the absolute inside surface radius
• DAt 50% beyond the outer leg dimension

When repairing an antique decorative fence, how can cast iron components be distinguished from wrought iron or mild steel during shop testing?

• ACast iron produces long yellow sparks with no bursts
• BCast iron bends easily cold without cracking
• CCast iron produces short red sparks with fine bursts
• DCast iron is non-magnetic and highly flexible

According to AWS D1.2, which aluminum filler alloy is preferred for welding 6061-T6 handrails when high strength and crack resistance are required, but the assembly will NOT be anodized after welding?

• AER1100 filler wire
• BER4043 filler wire
• CER5356 filler wire
• DER2319 filler wire

If a 6061-T6 welded aluminum architectural railing assembly IS scheduled to undergo post-weld clear or color anodizing, which filler wire MUST be used to prevent the weld seam from turning dark gray/black?

• AER4043 filler wire
• BER4047 filler wire
• CER1100 filler wire
• DER5356 filler wire

When using an ironworker machine to punch 9/16-inch holes in 3/8-inch thick A36 steel flat bar, what die clearance relative to plate thickness is standard to produce a clean shear without excessive burring?

• A0% clearance (exact size punch and die)
• B25% of plate thickness clearance
• C50% of plate thickness clearance
• D10% of plate thickness clearance

According to AWS D1.1, what requirement applies to tack welds that will be incorporated into final structural welds on steel railings?

• ATack welds may be made with any unapproved wire
• BTack welds must meet final weld quality standards
• CTack welds must be ground out completely every time
• DTack welds do not require qualified welders

When flame cutting a 1/2-inch steel base plate for an ornamental column, what flame adjustment is required for clean, scale-free cuts?

• AA neutral flame with equal oxygen and acetylene
• BA strongly carburizing flame with excess acetylene
• CAn oxidizing flame with minimal oxygen pressure
• DA reducing flame with propane gas only

To prevent iron contamination and premature rusting on fabricated 316 stainless steel handrails, what shop grinding rule MUST be followed?

• AUse carbon steel wire wheels for fast cleaning
• BGrind stainless steel after grinding iron with same wheel
• CUse dedicated stainless grinding wheels and brushes
• DWash ground areas with raw tap water containing chlorine

When plasma cutting intricate decorative patterns out of 1/4-inch 304 stainless steel plate, which gas mixture produces the cleanest, dross-free edge quality?

• ACompressed air for general-purpose cutting
• BArgon-Hydrogen or Nitrogen gas mixture
• CPure Oxygen gas
• D100% Carbon Dioxide

When fabricating a square frame from 2" x 2" steel tubing, at what precise angle should each tube end be cut on a cold saw to form a true 90-degree miter corner joint?

• ACut each end at a 45.0-degree angle
• BCut each end at a 22.5-degree angle
• CCut each end at a 60.0-degree angle
• DCut each end at a 30.0-degree angle

When turning a solid 2-inch brass bar on a metal lathe to form a decorative spherical finial, what cutting fluid strategy prevents work hardening and surface galling?

• ARun completely dry without lubrication at max RPM
• BUse heavy sulfurized cutting oil meant for cast iron
• CApply cool tap water continuously without oil
• DUse water-soluble coolant or light mineral oil

After extensive cold-bending of 1-inch solid square steel bars into tight ornamental scrolls, what heat treatment relieves internal residual stress before final powder coating?

• AQuenching in cold oil from 1,600°F
• BHeating to 2,000°F and rapid air blowing
• CHeat to 1,100°F-1,250°F and slow cool
• DFreezing at -20°F for 24 hours

According to the building code, what is the MINIMUM required height for guardrails installed on commercial elevated walking surfaces, balconies, and open-sided stairs?

• AA minimum height of 36 inches
• BA minimum height of 38 inches
• CA minimum height of 42 inches
• DA minimum height of 48 inches

According to the building code and ADA guidelines, at what height must top gripping surfaces of handrails be mounted above stair tread nosings and ramp surfaces?

• ABetween 30 inches and 34 inches
• BBetween 36 inches and 42 inches
• CBetween 32 inches and 36 inches
• DBetween 34 inches and 38 inches