100+ Free AZ ROC C-38 Signs Practice Questions

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2026 Statistics

Key Facts: AZ ROC C-38 Signs Exam

30 Questions

Official Question Count

PSI Candidate Information Bulletin

75 Minutes

Time Limit

PSI Candidate Information Bulletin

70%

Passing Score

Arizona Registrar of Contractors

$66

Exam Fee

PSI Services LLC

Open Book Computerized MCQ

Exam Format

PSI / AZ ROC Guidelines

100 Questions

Practice Question Bank

OpenExamPrep Practice Bank

The Arizona ROC C-38 Signs Examination consists of 30 scored multiple-choice questions administered in a 75-minute open-book PSI computer-delivered session with a 70% passing threshold ($66 exam fee). This online practice bank provides 100 realistic English-language practice questions with comprehensive technical explanations adapted for exam preparation.

Sample AZ ROC C-38 Signs Practice Questions

Try these sample questions to test your AZ ROC C-38 Signs exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1A 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?

A.2.0 sq ft

B.6.0 sq ft

C.4.0 sq ft

D.8.0 sq ft

Explanation: Soil bearing area is calculated by dividing total vertical load by allowable bearing capacity: 6,000 lbs / 1,500 lbs/sq ft = 4.0 sq ft. A 2 ft by 2 ft square footing satisfies this minimum requirement.

2Per 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?

A.6 bolt diameters

B.12 bolt diameters

C.8 bolt diameters

D.24 bolt diameters

Explanation: Building codes and ACI 318 recommendations specify a minimum embedment depth of 12 anchor bolt diameters (or a minimum of 12 inches for typical 1-inch sign bolts) to develop full tensile yield strength in concrete footings.

3When 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?

A.1 to 2 inches

B.6 to 8 inches

C.9 to 10 inches

D.3 to 4 inches

Explanation: A slump of 3 to 4 inches provides optimal workability for placing structural concrete into drilled pier footings while maintaining design compressive strength without excessive water-cement ratio segregation.

4According 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?

A.1.5 inches

B.3.0 inches

C.2.0 inches

D.4.0 inches

Explanation: ACI 318 specifies a minimum concrete cover of 3.0 inches for reinforcing steel cast against and permanently exposed to earth to prevent soil moisture and aggressive minerals from corroding the rebar.

5Before 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)?

A.24 hours

B.7 days

C.3 days

D.28 days

Explanation: Standard concrete cures to approximately 70% of its 28-day design compressive strength within 7 days. Heavy structural sign pole loads and wind moments should not be applied before achieving this 7-day cure milestone.

6To 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?

A.3 feet

B.12 feet

C.5 feet

D.20 feet

Explanation: Standard construction guidelines recommend limiting unconfined free-fall drop of concrete to 5 feet (or using drop chutes/tremie pipes) to prevent heavy coarse aggregates from separating from the mortar matrix.

7A 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)?

A.1.1 cubic yards

B.2.1 cubic yards

C.4.2 cubic yards

D.6.3 cubic yards

Explanation: Volume of cylinder = pi * radius^2 * depth. Radius = 1.5 ft. Volume = 3.14159 * (1.5)^2 * 8 = 56.55 cubic feet. Convert to cubic yards: 56.55 / 27 = 2.09, which rounds to 2.1 cubic yards.

8When setting double-nut leveling base plates for a pole sign foundation, what is the proper placement and thread projection requirement for the anchor bolts?

A.Leveling nuts are embedded inside the wet concrete surface flush with top of pier.

B.Top nuts are tightened down directly onto wet concrete before it sets.

C.Leveling nuts sit on top of the concrete, leaving a 1 to 2 inch grout space under the plate, with 1 to 2 bolt threads protruding above the top nut.

D.Anchor bolts must be fully welded to the bottom leveling nuts after pole alignment.

Explanation: Double-nut leveling setups place leveling nuts above the concrete surface to adjust pole plumbness, leaving a 1-to-2 inch air gap for non-shrink grout placement. Anchor bolts should project enough to show 1 to 2 full threads above the top jamb nut.

9What is the standard minimum 28-day compressive strength (f'c) required for commercial outdoor sign post structural concrete foundations in Arizona?

A.1,500 PSI

B.2,000 PSI

C.5,000 PSI

D.3,000 PSI

Explanation: Standard commercial building codes and engineering plans specify a minimum 28-day compressive strength of 3,000 PSI for exterior structural sign foundations exposed to weather and soil conditions.

10In 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?

A.Type I (Normal)

B.Type III (High Early Strength)

C.Type II or Type V (Sulfate Resistant)

D.Type IV (Low Heat of Hydration)

Explanation: Type II cement provides moderate sulfate resistance and Type V provides high sulfate resistance, preventing chemical expansion and disintegration of concrete placed in alkali and high-sulfate desert soils.

About the AZ ROC C-38 Signs Exam

The Arizona ROC C-38 Signs Examination is a computer-delivered, open-book trade examination administered by PSI Services LLC for the Arizona Registrar of Contractors. The exam tests practical and theoretical trade knowledge required for sign installation contractors, including structural concrete footings, anchor bolt placement, crane hoisting and boom truck load calculations, mechanical and chemical masonry fasteners, OSHA 1926 safety regulations, and NEC 2017 Article 600 electrical sign branch circuits, disconnects, LED drivers, neon transformers, and equipment grounding.

Questions

30 scored questions

Time Limit

75 minutes

Passing Score

70%

Exam Fee

$66 (Arizona ROC / PSI Services LLC)

AZ ROC C-38 Signs Exam Content Outline

13%

Concrete

Footing excavation, soil bearing capacity, formwork, concrete mixes, rebar cage placement, anchor bolt embedment, curing, slump testing, and foundation structural specs for outdoor sign posts and monument signs.

20%

Equipment Operation

Operation of boom trucks, mobile cranes, aerial bucket lifts, rigging hardware, wire rope slings, load chart calculations, outrigger setup, center of gravity determination, and overhead power line clearances.

13%

Fasteners

Concrete wedge anchors, sleeve anchors, chemical epoxy anchors, toggle bolts, high-strength structural bolts (A325/A490), wind load tension and shear calculations, and corrosion resistance for exterior sign mountings.

14%

OSHA Safety

OSHA 29 CFR 1926 construction safety standards, personal fall arrest systems (PFAS), ladder and scaffolding safety, lockout/tagout (LOTO), trenching safety, hazard communication, and PPE requirements.

40%

Electrical

National Electrical Code (NEC) Article 600 electric signs and outline lighting, 20-amp branch circuit limits, disconnect switches within sight, bonding/grounding, secondary neon/LED power supply wiring, conduit selection, and conductor ampacity.

How to Pass the AZ ROC C-38 Signs Exam

What You Need to Know

Passing score: 70%
Exam length: 30 questions
Time limit: 75 minutes
Exam fee: $66

Keys to Passing

Work through all 100 available questions
Review every answer and explanation
Track weak areas and revisit them
Use our AI tutor for tough concepts

AZ ROC C-38 Signs Study Tips from Top Performers

1Master NEC Article 600 for electric signs, including 20-amp branch circuit limits, disconnect switch location within sight (or lockable), equipment grounding, LED driver continuous load sizing, and secondary wiring clearances.

2Review crane and boom truck load chart calculations, deduction of block/rigging weight, outrigger float pad area calculations, and OSHA 1926.1400 crane safety rules.

3Understand concrete footing design for sign poles, including anchor bolt embedment depth, edge distance, hook placement, slump requirements, and 28-day compressive strength.

4Study structural fastener performance in concrete and masonry, including tension vs. shear capacity, minimum anchor spacing, torque specifications, and wind load design.

5Memorize OSHA 1926 safety requirements for minimum clearance around energized overhead power lines (10 ft up to 50 kV) and 100% fall protection guidelines at 6 feet or higher.

Frequently Asked Questions

How many questions are on the official Arizona ROC C-38 Signs exam?

The official PSI C-38 Signs exam contains 30 scored multiple-choice questions. Candidates are allotted 75 minutes to complete the test.

What passing score is required for the AZ ROC C-38 exam?

A minimum passing score of 70% (21 correct out of 30 questions) is required to pass the trade exam.

Is the Arizona ROC C-38 Signs exam open book?

Yes, the examination is open-book. Approved reference materials (such as NEC 2017, OSHA 29 CFR 1926, and sign installation codebooks) may be brought into the PSI testing center.

What topics carry the highest weight on the C-38 exam?

Electrical carries the highest weight at 40% (12 questions), followed by Equipment Operation at 20% (6 questions), OSHA Safety at 14% (4 questions), Concrete at 13% (4 questions), and Fasteners at 13% (4 questions).

Where can I schedule the AZ ROC C-38 Signs exam?

Examinations are scheduled online through PSI Services LLC at https://test-takers.psiexams.com/azcon or by calling PSI candidate services.

100+ Free AZ ROC C-38 Signs Practice Questions

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