Arizona ROC B-1/B-2/KB-1/KB-2 Residential and Commercial Building Examination

Under OSHA 29 CFR 1926 Subpart P, what is the maximum unconfined compressive strength threshold for cohesive soil to be classified as Type A soil?

• A0.5 tons per square foot (tsf)
• B1.5 tons per square foot (tsf)
• C2.5 tons per square foot (tsf)
• D4.0 tons per square foot (tsf)

A soil sample tested using the Modified Proctor Test (ASTM D1557) achieves a maximum dry density of 124.0 pcf at an optimum moisture content of 11.5%. During field quality control testing, a nuclear density gauge measures a wet density of 134.4 pcf at a moisture content of 12.0%. What is the relative compaction percentage, and does it satisfy a specification requiring 95% Modified Proctor density?

• A92.5%, which fails specification
• B94.0%, which fails specification
• C96.8%, which meets specification
• D98.2%, which meets specification

A contractor must excavate a trench measuring 400 feet long, 6 feet wide, and 8 feet deep. If the undisturbed soil in bank cubic yards (BCY) has a swell factor of 25% when excavated into loose cubic yards (LCY), how many loose cubic yards of material must be hauled away by dump trucks?

• A888.9 LCY
• B711.1 LCY
• C640.0 LCY
• D960.0 LCY

According to IBC Section 1804.4, what is the minimum required slope away from a building foundation wall for unpaved ground surface, and over what minimum distance must it be maintained?

• A1% slope (1/8 inch per foot) for 5 feet
• B2% slope (1/4 inch per foot) for 8 feet
• C3% slope (3/8 inch per foot) for 6 feet
• D5% slope (6 inches drop) for 10 feet

Per IBC Table 1806.2 (Presumptive Load-Bearing Values), what is the official default presumptive allowable foundation pressure for sandy gravel and/or gravel soils in the absence of a site-specific geotechnical report?

• A1,500 psf
• B3,000 psf
• C4,000 psf
• D12,000 psf

When installing a subterranean French drain system around a foundation perimeter to intercept high groundwater, what is the primary function of wrapping the aggregate pocket with a non-woven geotextile filter fabric?

• ATo prevent fine soil particles from migrating into and clogging the gravel reservoir and…
• BTo increase the structural load capacity of the overburden soil above the drain pipe
• CTo seal out water completely and act as a primary vapor barrier for the footing
• DTo accelerate concrete curing of adjacent spread footings by retaining soil moisture

In segmental retaining wall (SRW) design, what is the standard recommended minimum geogrid reinforcement embedment length expressed as a ratio of total wall height (H) for typical soil and surcharge conditions?

• A0.3 H to 0.4 H
• B0.5 H to 0.6 H
• C0.7 H to 0.8 H
• D1.2 H to 1.5 H

To prevent severe hydrostatic pressure accumulation behind a cast-in-place concrete retaining wall, which drainage detail must be incorporated near the base of the wall?

• AHorizontal expansion joint material placed at 4-foot vertical intervals
• B3-mil polyethylene sheeting adhered directly to the backface of the wall
• CClosed-cell spray foam insulation applied to the heel of the footing
• DWeep holes placed at or near grade level with free-draining granular backfill

A structural steel column delivers an ultimate dead plus live design load of 180,000 pounds (180 kips) to a square concrete spread footing resting on soil with an allowable bearing capacity of 3,000 psf. What is the minimum required side length of the square spread footing?

• A6.0 feet
• B7.8 feet
• C8.5 feet
• D10.0 feet

A continuous concrete grade beam footing measures 300 feet long, 24 inches wide, and 12 inches deep. Allowing a 10% waste factor for ground irregularities, how many cubic yards of ready-mix concrete should be ordered?

• A24.4 cubic yards
• B22.2 cubic yards
• C18.5 cubic yards
• D26.7 cubic yards

How does decreasing the water-cementitious materials (w/cm) ratio affect the hardened properties of structural concrete?

• AIt increases permeability and decreases compressive strength
• BIt increases slump and improves placeability
• CIt increases compressive strength and decreases permeability
• DIt decreases compressive strength and increases freeze-thaw durability

When performing a concrete slump test in accordance with ASTM C143, how many equal-volume layers is the frustum cone filled, and how many tamping rod strokes are applied per layer?

• A2 equal layers, 15 strokes per layer
• B3 equal layers, 50 strokes per layer
• C4 equal layers, 20 strokes per layer
• D3 equal-volume layers, 25 strokes per layer

According to ACI 318 Section 20.6.1 (and IBC 1907), what is the minimum required concrete protection cover for reinforcing steel in non-prestressed concrete cast directly against and permanently exposed to earth?

• A1.5 inches (38 mm)
• B3.0 inches (75 mm)
• C2.0 inches (50 mm)
• D0.75 inches (19 mm)

In unreinforced concrete slabs-on-ground, what is the maximum recommended control joint spacing in feet recommended by ACI 302.1R for a 6-inch thick floor slab?

• A12 to 18 feet
• B6 to 8 feet
• C20 to 25 feet
• D30 to 36 feet

Under ASTM standard bar designations for reinforcing steel, what is the nominal diameter and cross-sectional area of a #8 rebar?

• A0.75 inch diameter and 0.44 sq in area
• B0.875 inch diameter and 0.60 sq in area
• C1.00 inch diameter and 0.79 sq in area
• D1.128 inch diameter and 1.00 sq in area

According to ASTM C94 (Standard Specification for Ready-Mixed Concrete), concrete must be completely discharged from the truck mixer within how long after the introduction of mixing water to the cement and aggregates?

• A45 minutes or 150 revolutions
• B60 minutes or 200 revolutions
• C120 minutes or 400 revolutions
• D90 minutes or 300 revolutions

Before applying post-tensioning forces to unbonded tendons in a post-tensioned concrete slab, which quality control threshold must be confirmed by field testing?

• AThe concrete must age a minimum of 28 full curing days regardless of cylinder breaks
• BField-cured concrete test cylinders must verify the slab has achieved the minimum specifi…
• CFormwork shores must be completely removed prior to tendon tensioning
• DTendons must be greased and flushed with water to reduce frictional resistance

According to ACI 308, what is the minimum required duration for moist curing structural concrete made with standard Type I Portland cement maintained above 50°F (10°C)?

• A7 days
• B3 days
• C14 days
• D28 days

Using ACI 347 lateral concrete pressure formulas for wall forms, what is the maximum lateral pressure (p_max) exerted by standard normal weight concrete placed at a pour rate of R = 4 ft/hr and concrete temperature T = 70°F (where rate R <= 7 ft/hr)?

• A450 psf
• B550 psf
• C664 psf
• D820 psf

Under ACI 305R (Hot Weather Concreting), what rate of surface moisture evaporation triggers mandatory precautions (such as fog spraying or windbreaks) to prevent plastic shrinkage cracking?

• A0.05 lb/sq ft/hr
• B0.10 lb/sq ft/hr
• C0.15 lb/sq ft/hr
• D0.20 lb/sq ft/hr

According to ACI 306R (Cold Weather Concreting), when ambient air temperature is 30°F, what is the minimum required temperature of concrete as placed for structural sections less than 12 inches thick?

• A40°F
• B55°F
• C65°F
• D75°F

According to ACI 318 Section 25.5.2, what is the length requirement for a Class B tension lap splice expressed relative to the calculated tensile development length (l_d)?

• A1.30 l_d
• B1.00 l_d
• C1.50 l_d
• D1.75 l_d

For concrete exposed to severe freeze-thaw cycles and deicing chemicals, what total air content range is specified by ACI 211.1 for concrete formulated with 3/4-inch nominal maximum aggregate size?

• A2.0% to 3.5%
• B3.5% to 5.0%
• C6.0% (range 5.0% to 7.0%)
• D8.5% to 10.0%

What are the actual manufactured dimensions of a standard nominal 8-inch x 8-inch x 16-inch concrete masonry unit (CMU)?

• A8.0 inches x 8.0 inches x 16.0 inches
• B7.75 inches x 7.75 inches x 15.75 inches
• C7.5 inches x 7.5 inches x 15.5 inches
• D7.625 inches x 7.625 inches x 15.625 inches

Under ASTM C270 (Standard Specification for Mortar for Unit Masonry), which mortar type is specified for structural below-grade foundation walls and masonry retaining walls subjected to high lateral loads?

• AType N
• BType S
• CType O
• DType K

Per TMS 602 / IBC 2104, when grouting concrete masonry walls using high-lift grouting procedures where the grout pour height exceeds 5 feet 4 inches, what structural provision is mandatory at the bottom of each vertical core containing reinforcement?

• ACleanout openings must be provided at the bottom of each core
• BHorizontal bond beams must be omitted at 4-foot vertical intervals
• CExpansion joint material must be inserted in all vertical cores
• DFine grout must be substituted with Type O mortar

A concrete masonry wall measures 50 feet long by 12 feet high. Using the standard estimation factor of 1.125 units per square foot of wall area, how many standard 8x8x16 CMU blocks are required (excluding waste)?

• A533 blocks
• B600 blocks
• C675 blocks
• D720 blocks

According to ASTM C476 (Standard Specification for Grout for Masonry), what is the specified slump range for field-mixed masonry grout at the time of placement?

• A2 to 4 inches
• B4 to 6 inches
• C6 to 8 inches
• D8 to 11 inches

Per IBC Section 2104, what is the minimum bearing length required for a precast concrete or structural steel lintel supported on solid masonry walls at each end?

• A2 inches
• B4 inches
• C8 inches
• D12 inches

According to NCMA TEK guidelines, what is the maximum recommended spacing of vertical control joints in unreinforced concrete masonry walls?

• A25 feet (or length-to-height ratio of 1.5)
• B15 feet (or length-to-height ratio of 1.0)
• C40 feet (or length-to-height ratio of 2.0)
• D50 feet (or length-to-height ratio of 3.0)

According to IBC Section 2104.1.8, what is the maximum allowable center-to-center spacing for weep holes located immediately above cavity wall flashing in exterior brick masonry veneer?

• A16 inches o.c.
• B24 inches o.c.
• C33 inches o.c.
• D48 inches o.c.

Under TMS 602 Cold Weather Construction provisions, when ambient air temperature falls below 20°F (-7°C), which protective measure must be maintained during masonry unit laying?

• AMortar mixing water must be cooled to 32°F
• BMasonry units must be soaked in liquid calcium chloride
• CSand aggregate must be frozen prior to batching
• DEnclosures and auxiliary heat must be provided to maintain ambient air above 32°F around…

When placing horizontal reinforcing steel bars in continuous CMU bond beams at wall corners and intersections, what is the minimum required lap splice length expressed in bar diameters (d_b)?

• A20 bar diameters
• B40 bar diameters
• C60 bar diameters
• D80 bar diameters

In the AISC Steel Construction Manual designation 'W14 x 34', what do the numbers '14' and '34' represent?

• ANominal depth of 14 inches and weight of 34 pounds per linear foot
• BFlange width of 14 inches and web thickness of 0.34 inches
• CNominal depth of 14 centimeters and yield strength of 34 ksi
• DCross-sectional area of 14 sq in and beam length of 34 feet

When installing ASTM A325 high-strength structural bolts using the AISC turn-of-nut method for slip-critical connections, what is the required rotation from snug-tight condition for bolts up to 4 diameters in length where both faces are normal to the bolt axis?

• A1/4 turn
• B1/3 turn
• C1/2 turn
• D1 full turn

In the AWS welding electrode classification 'E7018', what does the digit '70' signify?

• AMaximum welding current of 70 Amperes
• BMinimum tensile strength of 70,000 psi (70 ksi)
• CElectrode outer diameter of 0.70 inches
• D70% iron powder content in the flux coating

According to Steel Joist Institute (SJI) specifications, what is the minimum required bearing length for standard K-Series open-web steel joists supported on structural steel beams?

• A1.5 inches
• B2.5 inches
• C4.0 inches
• D6.0 inches

According to Steel Deck Institute (SDI) guidelines, what is the standard diameter and maximum spacing for puddle welds (plug welds) used to attach metal roof deck to supporting structural joists along panel ends?

• A5/8-inch diameter welds spaced maximum 12 inches o.c.
• B1/4-inch diameter welds spaced maximum 24 inches o.c.
• C1.0-inch diameter welds spaced maximum 36 inches o.c.
• D3/8-inch diameter welds spaced maximum 18 inches o.c.

In light-gauge cold-formed steel framing member callout '600S162-43', what does '43' indicate?

• ADesign thickness of 43 mils (0.0428 inches / 18 gauge)
• BMember yield strength of 43 ksi
• CFlange width of 4.3 inches
• DOverall web depth of 4.3 inches

To prevent accelerated galvanic corrosion when aluminum architectural elements contact structural carbon steel in damp environments, which isolation material should be installed between the metals?

• AUntreated Douglas fir wood shims
• BWet mortar paste
• CCopper wire mesh
• DNon-conductive neoprene gaskets, elastomeric isolation tapes, or bituminous paint

Under OSHA 29 CFR 1926.757 (Steel Erection - Open Web Steel Joists), on steel joists spanning more than 60 feet, when is it permissible to release the hoisting cables?

• AImmediately after landing the joist on the beam seat
• BOnly after bolted diagonal bridging is installed and anchored on both ends
• CAfter tack welding one end of the joist bottom chord
• DWhen 50% of metal decking is placed on the joists

Per OSHA 29 CFR 1926.755(a)(1), all structural steel columns must be anchored by a minimum of how many anchor bolts to ensure erection stability?

• A4 anchor bolts
• B2 anchor bolts
• C6 anchor bolts
• D3 anchor bolts

Under OSHA 29 CFR 1926.760(c), what is the maximum height above a lower level at which a Controlled Decking Zone (CDZ) may be established for workers installing metal decking?

• A15 feet
• B20 feet
• C30 feet (or two stories)
• D40 feet

Under OSHA 29 CFR 1926.760(b), structural steel connectors operating between 15 feet and 30 feet above a lower level must be provided with personal fall protection equipment. What special provision applies to connectors in this height zone?

• AThey must wear hard hats with chin straps but fall arrest gear is prohibited
• BThey are exempt from wearing fall protection gear up to 40 feet
• CThey must be provided with a fall arrest system and have the ability to tie off
• DThey must use wooden scaffolding planks instead of steel beams