Arizona ROC C-38 Signs Examination

A commercial monument sign exerts a total downward dead load plus live load of 6,000 lbs on its concrete foundation. If the soil report indicates an allowable soil bearing capacity of 1,500 lbs/sq ft, what is the minimum square surface area required for the concrete footing pad?

• A2.0 sq ft
• B6.0 sq ft
• C4.0 sq ft
• D8.0 sq ft

Per standard structural engineering practices for freestanding pylon sign concrete foundations, what is the minimum embedment depth requirement for cast-in-place structural anchor bolts unless otherwise specified by an engineer?

• A6 bolt diameters
• B12 bolt diameters
• C8 bolt diameters
• D24 bolt diameters

When placing unpumped standard structural concrete into a sign post pier foundation, what is the typical acceptable slump range per ASTM C143 guidelines to ensure proper consolidation without excessive water?

• A1 to 2 inches
• B6 to 8 inches
• C9 to 10 inches
• D3 to 4 inches

According to ACI 318 standards, what is the minimum required concrete protective cover for reinforcing steel in a sign footing poured directly against unformed soil or earth?

• A1.5 inches
• B3.0 inches
• C2.0 inches
• D4.0 inches

Before erecting a heavy steel pylon sign pole onto a newly poured concrete foundation, how long should standard Type I/II concrete cure under standard conditions to achieve sufficient compressive strength (typically 70% of design strength)?

• A24 hours
• B7 days
• C3 days
• D28 days

To prevent aggregate segregation when pouring wet concrete into a deep drilled pier sign foundation without using a tremie pipe, what is the maximum recommended vertical free-fall drop height?

• A3 feet
• B12 feet
• C5 feet
• D20 feet

A sign contractor is augering a cylindrical pier foundation that is 3 feet in diameter and 8 feet deep. How many cubic yards of concrete are required to pour this pier (ignoring waste)?

• A1.1 cubic yards
• B2.1 cubic yards
• C4.2 cubic yards
• D6.3 cubic yards

When setting double-nut leveling base plates for a pole sign foundation, what is the proper placement and thread projection requirement for the anchor bolts?

• ALeveling nuts are embedded inside the wet concrete surface flush with top of pier.
• BTop nuts are tightened down directly onto wet concrete before it sets.
• CLeveling nuts sit on top of the concrete, leaving a 1 to 2 inch grout space under the pla…
• DAnchor bolts must be fully welded to the bottom leveling nuts after pole alignment.

What is the standard minimum 28-day compressive strength (f'c) required for commercial outdoor sign post structural concrete foundations in Arizona?

• A1,500 PSI
• B2,000 PSI
• C5,000 PSI
• D3,000 PSI

In desert areas of Arizona where soil testing reveals moderate to severe water-soluble sulfate concentrations, which Portland cement type must be specified for sign footings to prevent sulfate attack?

• AType I (Normal)
• BType III (High Early Strength)
• CType II or Type V (Sulfate Resistant)
• DType IV (Low Heat of Hydration)

Why are headed anchor bolts or anchor bolts with bottom nuts and washer plates preferred over smooth bent J-bolts for high wind load sign foundations?

• AJ-bolts are illegal to use in any electrical sign installation.
• BSmooth J-bolts tend to straighten out and pull through concrete under high tensile wind u…
• CHeaded bolts do not require any welding to rebar cages.
• DJ-bolts cannot be galvanized for rust protection.

When consolidating fresh concrete around an anchor bolt cage inside a pier form using an internal mechanical vibrator, what is the proper operation technique?

• ADrag the vibrator horizontally through the concrete across the entire pier length.
• BInsert the vibrator vertically rapidly and allow it to sit in one spot for 2 minutes.
• CInsert the vibrator vertically at close intervals, penetrate the full lift depth, and wit…
• DVibrate the anchor bolt cage directly to spread vibration through steel.

A 100 sq ft pylon sign experiences a lateral wind load force of 2,000 lbs acting at an effective height of 20 feet above the ground. What is the total overturning moment applied to the top of the concrete foundation?

• A100 lb-ft
• B4,000 lb-ft
• C20,000 lb-ft
• D40,000 lb-ft

A crane's published gross rating on the load chart at a 30-foot operating radius is 12,000 lbs. The crane's main hook block weighs 350 lbs, the headache ball on the auxiliary line weighs 150 lbs, and rigging straps weigh 100 lbs. What is the maximum net allowable sign weight that can be lifted?

• A11,400 lbs
• B11,500 lbs
• C11,650 lbs
• D12,000 lbs

According to OSHA 29 CFR 1926.1408, what is the absolute minimum clearance distance required when operating a boom truck crane near energized power lines rated up to 50 kV when line voltage is not verified?

• A10 feet
• B5 feet
• C15 feet
• D20 feet

During a pre-lift rigging inspection of synthetic web slings for hoisting a cabinet sign, which defect requires the sling to be immediately removed from service?

• ASlight discoloration from clean tap water exposure
• BMissing capacity rating tag or visible warning core yarns showing red
• CDust or airborne dirt particles on outer webbing
• DManufacturer serial number stamped on aluminum end fitting

A crane outrigger float transmits a maximum downward concentrated load of 20,000 lbs onto uncompacted soil with an allowable soil bearing capacity of 2,500 lbs/sq ft. What is the minimum surface area required for the cribbing/outrigger pad?

• A8 sq ft
• B4 sq ft
• C10 sq ft
• D12 sq ft

Under ASME B30.5 crane standard rules, what standard hand signal indicates an EMERGENCY STOP to the crane operator during a sign hoisting operation?

• ABoth arms extended horizontally, palms down, moving arms rapidly back and forth
• BArm extended horizontally, palm down, moving hand rapidly side to side
• CIndex finger pointing upward, moving hand in small horizontal circles
• DBoth fists clenched in front of chest

When operating an aerial bucket truck to service wall signs, where must the operator attach the fall arrest lanyard?

• ATo an approved anchor point inside the bucket platform specified by the lift manufacturer
• BTo a solid structural member of the sign frame being serviced
• CTo an adjacent building structural I-beam or roof anchor
• DTo the vehicle side-view mirror frame

What is the primary purpose of attaching non-conductive synthetic tag lines to large cabinet signs during crane hoisting operations?

• ATo support a portion of the sign's total weight during the lift
• BTo control sign rotation and guide movement while keeping riggers at a safe distance
• CTo ground static electricity charges from the crane hook
• DTo pull the crane boom laterally when rotating

Per ASME B30.9 rigging standards, a wire rope sling must be immediately removed from service if how many randomly distributed broken wires are found in one lay length?

• A2 broken wires
• B4 broken wires
• C6 broken wires
• D10 broken wires

Prior to lifting rated loads with a hydraulic boom truck crane, how must outriggers be configured?

• AExtended halfway with tires resting firmly on the ground
• BFully extended to firm footing with vehicle tires raised completely off the ground to rem…
• CRetracted to keep outrigger beams out of traffic lanes
• DExtended only on the side of the truck where the load is being lifted

A 4,000 lb sign cabinet is lifted using a two-leg bridle sling setup where each sling leg forms a 45-degree angle with the horizontal sign face. What is the tension force created in each sling leg?

• A2,828 lbs
• B2,000 lbs
• C4,000 lbs
• D5,656 lbs

To maintain valid published load chart capacities, a mobile crane must be set up level within what maximum percentage of grade tolerance?

• A1% grade (0.57 degrees)
• B3% grade (1.7 degrees)
• C5% grade (2.8 degrees)
• D10% grade (5.7 degrees)

Under OSHA 29 CFR 1926 Subpart CC, crane operator certification by an accredited testing organization (such as NCCCO) is mandatory for equipment with a maximum manufacturer lifting capacity exceeding what threshold?

• A2,000 lbs
• B1,000 lbs
• C5,000 lbs
• D10,000 lbs

When operating a mobile crane near high-voltage transmission lines rated at 230 kV, what is the minimum required safe clearance distance per OSHA 1926.1408 Table A?

• A10 feet
• B20 feet
• C15 feet
• D35 feet

In crane hoisting design, what does the D/d ratio refer to, and why is maintaining a proper D/d ratio critical?

• ARatio of boom Diameter to Distance; affects swing speed
• BRatio of Distance to Outrigger depth; prevents ground depression
• CRatio of Drum capacity to line drop; controls line pull
• DRatio of Sheave pitch diameter (D) to wire rope diameter (d); prevents excessive rope ben…

When hoisting an asymmetrical double-face cabinet sign with internal heavy electrical transformers offset to one side, where must the crane hook be positioned relative to the sign before lifting?

• ADirectly over the geometric center of the sign cabinet frame
• BAligned with the lighter side of the sign to prevent tilt
• CDirectly over the center of gravity of the combined sign load
• DAt the extreme top corner of the cabinet structure

Which of the following items is mandatory to verify during the daily visual pre-operational inspection of a hydraulic boom truck?

• APaint shade match on boom extension sections
• BRadio station preset calibration inside operator cab
• CExhaust tailpipe polished gloss finish
• DHydraulic fluid levels, hose leak integrity, wire rope condition, and outrigger lock safe…

As a crane boom is lowered to a flatter angle while holding a constant load weight, how do operating radius and rated crane capacity change?

• AOperating radius decreases and crane capacity increases.
• BOperating radius increases and rated crane capacity decreases.
• COperating radius and rated crane capacity remain completely unchanged.
• DOperating radius increases and rated crane capacity increases.

When hoisting a large, flat 12 ft x 24 ft flex-face cabinet sign with a mobile crane, why must operations cease when ambient wind gusts exceed 20 to 25 mph?

• ALarge surface area signs act as sails, generating extreme wind forces that cause load ins…
• BHigh winds automatically short-circuit the crane engine computer.
• CWind speeds over 20 mph immediately void all truck tire warranties.
• DFederal law bans all highway sign installations during daytime wind.

When using screw pin anchor shackles for overhead hoisting of sign structures, what precaution must be taken to prevent the pin from unscrewing during a lift?

• AWrap masking tape around the shackle body
• BHeat the pin with a torch after tightening
• CLubricate the threads with heavy motor oil prior to load pickup
• DMouse (secure) the screw pin with soft steel wire or zip tie through the eye pin hole to…

A sign installer is configuring a crane lift for a structural sign assembly weighing 5,200 lbs. The spreader bar weighs 300 lbs, synthetic slings weigh 50 lbs, shackles weigh 30 lbs, and the lower hook block weighs 220 lbs. What is the total gross load acting on the crane boom tip?

• A5,200 lbs
• B5,500 lbs
• C6,000 lbs
• D5,800 lbs

When installing heavy-duty concrete wedge expansion anchors to secure a sign base plate into structural concrete, what is the standard minimum center-to-center anchor spacing requirement to prevent concrete overlap stress failure?

• A2 anchor diameters
• B5 anchor diameters
• C20 anchor diameters
• D10 anchor diameters

Why must mechanical expansion wedge anchors installed in concrete footings be tightened using a calibrated torque wrench to the manufacturer's exact specified foot-pounds?

• ATorque prevents electrical current from flowing through anchor steel
• BOver-torqueing turns the anchor into a chemical adhesive bond
• CProper torque expands the clip mechanism fully into concrete to achieve rated pullout cap…
• DTorqueing softens the anchor steel so it bends under wind load

What is the critical hole preparation sequence required prior to injecting structural chemical epoxy anchor adhesive into drilled masonry or concrete holes for sign mounts?

• ABlow out dust with oil-free compressed air, brush with wire brush, and blow out again (bl…
• BRinse hole with liquid detergent and install epoxy while wet
• CVacuum hole once with home shop vacuum
• DFill drilled hole with water to speed up epoxy curing time

How can a sign technician visually identify an ASTM A325 high-strength structural steel bolt from standard low-carbon Grade 2 bolts during structural frame assembly?

• AA325 bolts are painted bright yellow on the threaded end
• BA325 bolts have smooth unthreaded heads with no markings
• CA325 bolts have 'A325' stamped on the bolt head along with three radial lines
• DA325 bolts are manufactured exclusively with left-hand threads

When mounting a lightweight directory sign onto a hollow concrete masonry unit (CMU) wall using spring-wing toggle bolts, what clearance detail must be accounted for during installation?

• ADrilled hole diameter must be large enough to allow the folded spring wings to pass compl…
• BHole diameter must be smaller than the folded toggle wings
• CToggle bolts must be welded to the CMU wall face
• DToggle wings must remain compressed inside the outer wall tile thickness

When bolting an aluminum sign cabinet to a structural steel mounting angle in outdoor desert environments, what measure prevents severe galvanic corrosion between the dissimilar metals?

• AConnect a copper bonding wire directly between both metals
• BInstall non-conductive neoprene/nylon insulating washers and sleeves to physically isolat…
• CApply saltwater to oxidation joints during assembly
• DUse plain un-plated carbon steel bolts

A flat wall-mounted sign measuring 8 ft x 10 ft (80 sq ft) is exposed to a design wind pressure of 30 lbs/sq ft acting parallel to the wall face (shear). If the sign is attached using 6 equal structural bolts, what horizontal shear force must each bolt withstand?

• A400 lbs
• B600 lbs
• C2,400 lbs
• D4,800 lbs

When attaching sheet aluminum sign faces to structural steel tubing using self-drilling TEK screws, what is the minimum thread engagement rule required for structural integrity?

• AAt least 3 full threads must engage past the drill point into the structural metal backing
• BAt least 1 full thread
• CScrews must extend 4 inches past metal tubing
• DTEK screws do not require any thread engagement

Why are concrete sleeve anchors generally preferred over solid wedge anchors when fastening sign brackets into hollow concrete block (CMU) walls?

• ASleeve anchors do not require any pre-drilled holes
• BSleeve anchors are made exclusively of plastic
• CWedge anchors are prohibited from being used in any masonry building code
• DSleeve anchors expand along their full length sleeve, distributing expansion forces acros…

When mounting a heavy 800 lb illuminated projecting sign onto a hollow brick wall, what is the most secure structural fastening method?

• APlastic drywall anchors with sheet metal screws
• BShort 1/4-inch lead shield expansion anchors
• CHot-melt silicone adhesive beads along sign flanges
• DThrough-bolting with threaded steel rods completely through the wall secured by heavy int…

A pylon sign base plate experiences an overtuning wind moment of 12,000 lb-ft. The base plate uses 4 anchor bolts (2 on the windward tension side, 2 on the leeward compression side) spaced 1.5 feet apart across the moment axis. What is the total tension force resisted by the 2 windward anchor bolts?

• A8,000 lbs
• B4,000 lbs
• C12,000 lbs
• D18,000 lbs

For outdoor sign installations exposed to harsh industrial pollution or coastal chemical spray, why is Grade 316 stainless steel preferred over Grade 304 stainless steel?

• AGrade 316 is magnetic and adheres to steel beams without threads
• BGrade 304 is completely illegal for outdoor structural sign use
• CGrade 316 contains molybdenum, providing superior resistance to pitting and crevice corro…
• DGrade 316 has twice the tensile strength of high-strength carbon steel