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100+ Free Arizona ROC A-5 Excavating, Grading and Oil Surfacing Practice Questions

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2026 Statistics

Key Facts: Arizona ROC A-5 Excavating, Grading and Oil Surfacing Exam

30

Scored Questions on Official Exam

PSI Candidate Information Bulletin

75 mins

Official Time Limit

PSI Services LLC

70%

Passing Score (21/30)

Arizona Registrar of Contractors

$66

Trade Exam Fee

PSI / AZ ROC Fee Schedule

53%

Excavation, Compaction & Grading Blueprint Weight

AZ ROC A-5 Blueprint Outline

27%

Sealcoating Blueprint Weight

AZ ROC A-5 Blueprint Outline

10%

Blasting Blueprint Weight

AZ ROC A-5 Blueprint Outline

10%

OSHA Safety Blueprint Weight

AZ ROC A-5 Blueprint Outline

The Arizona ROC A-5 Excavating, Grading and Oil Surfacing trade examination consists of 30 scored multiple-choice questions delivered over a 75-minute computer-based testing session by PSI Services LLC, requiring a 70% passing score (21/30). This practice bank provides an English-language MCQ study adaptation comprising 100 realistic practice questions mapped to the official blueprint topic areas.

Sample Arizona ROC A-5 Excavating, Grading and Oil Surfacing Practice Questions

Try these sample questions to test your Arizona ROC A-5 Excavating, Grading and Oil Surfacing exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1An excavation project requires removing 1,200 bank cubic yards (BCY) of dense clay. If the clay has an estimated swell factor of 25%, what loose volume in loose cubic yards (LCY) must be hauled away by dump trucks?
A.1,500 LCY
B.1,200 LCY
C.960 LCY
D.1,440 LCY
Explanation: Loose volume (LCY) = Bank volume (BCY) × (1 + Swell %). Here, 1,200 BCY × (1 + 0.25) = 1,200 × 1.25 = 1,500 LCY.
2An earthmoving contractor needs to place 2,000 compacted cubic yards (CCY) of embankment fill. The borrow soil has a shrink factor of 15% relative to bank measure and a swell factor of 20% from bank to loose measure. How many loose cubic yards (LCY) of borrow soil must be hauled?
A.2,353 LCY
B.2,824 LCY
C.2,400 LCY
D.1,700 LCY
Explanation: First find Bank volume (BCY) needed: BCY = CCY / (1 - Shrinkage %) = 2,000 / (1 - 0.15) = 2,352.94 BCY. Next find Loose volume (LCY): LCY = BCY × (1 + Swell %) = 2,352.94 × 1.20 = 2,823.53 LCY, which rounds to 2,824 LCY.
3According to OSHA 29 CFR 1926 Subpart P, what is the maximum allowable simple slope for an un-shored excavation in Type A soil that is 12 feet deep and open for short-term duration?
A.1.5:1 (34 degrees)
B.1:1 (45 degrees)
C.3/4:1 (53 degrees)
D.1/2:1 (63 degrees)
Explanation: OSHA 1926 Subpart P Appendix B specifies that for excavations up to 20 feet deep in Type A soil, the maximum allowable simple slope is 3/4 horizontal to 1 vertical (3/4:1), corresponding to an angle of 53 degrees from horizontal.
4What is the primary operational difference in compaction energy between the Standard Proctor Test (ASTM D698) and the Modified Proctor Test (ASTM D1557)?
A.Modified Proctor uses a 5.5 lb hammer falling 12 inches with 12,400 ft-lb/ft³ energy.
B.Standard Proctor uses a 10 lb hammer falling 18 inches in 5 layers.
C.Standard Proctor applies 5 times greater compaction energy than Modified Proctor.
D.Modified Proctor uses a 10 lb hammer falling 18 inches with approximately 56,250 ft-lb/ft³ energy.
Explanation: The Modified Proctor test (ASTM D1557) simulates heavy modern aircraft and highway loads by dropping a 10 lb rammer from a height of 18 inches in 5 layers (56,250 ft-lb/ft³ energy), whereas Standard Proctor (ASTM D698) uses a 5.5 lb hammer dropped 12 inches in 3 layers (12,400 ft-lb/ft³ energy).
5When conducting a field density test using the Sand Cone Method (ASTM D1556), what standardized material is calibrated and poured into the excavated test hole to determine its volume?
A.Clean, uniform Ottawa silica sand (passing No. 20 and retained on No. 30 sieve)
B.Crushed limestone aggregate base
C.Well-graded pea gravel
D.Fine portland cement powder
Explanation: ASTM D1556 specifies standardized Ottawa silica sand (typically passing 850 µm / No. 20 sieve and retained on 600 µm / No. 30 sieve) of known bulk density to fill the excavated test hole and calibrate volume accurately.
6During soil compaction, what happens to the dry density of a soil if water is added beyond its Optimum Moisture Content (OMC) while applying the same compaction effort?
A.The dry density increases linearly.
B.The dry density decreases because excess water displaces soil solids in the voids.
C.The dry density remains constant at maximum value.
D.The dry density fluctuates randomly based on air temperature.
Explanation: Beyond OMC, excess water occupies space that would otherwise be filled by soil solids. Because water cannot be compressed and has lower specific gravity than mineral soil particles, dry density decreases past the peak of the moisture-density curve.
7Which type of compaction roller is most effective for compacting cohesive, plastic clay soils in heavy earthwork lifts?
A.Smooth steel drum roller
B.Vibratory plate compactor
C.Sheepsfoot (tamping foot) roller
D.Pneumatic tire roller with smooth treads
Explanation: Sheepsfoot (tamping foot) rollers provide high contact pressure and kneading action that breaks down clay clods and compacts cohesive soils from the bottom of the lift upward.
8For a clean granular soil consisting of well-graded sand and gravel, which compaction equipment provides the fastest density growth through particle rearrangement?
A.Tamping foot roller
B.Static grid roller
C.Manual hand tamper
D.Vibratory smooth drum roller
Explanation: Vibration reduces internal friction between non-cohesive granular particles (sand/gravel), allowing them to rearrange into a dense configuration rapidly under smooth vibratory drums.
9When soft, saturated silt is encountered below a proposed aggregate base course, what primary function does a woven geotextile fabric perform when placed directly on the subgrade?
A.Separation of the soft subgrade from the aggregate base to prevent intermixing under wheel loads
B.Chemical neutralization of subgrade organic matter
C.Increasing subgrade moisture retention
D.Thermal insulation against deep frost heave
Explanation: The primary stabilization role of a geotextile on soft subgrade is separation—preventing base aggregate from sinking into soft subgrade soil and preventing subgrade fines from pumping up into aggregate voids under traffic loads.
10How does hydrated lime (Ca(OH)₂) chemically stabilize highly plastic clay subgrade soils?
A.It reduces soil pH to dissolve clay minerals.
B.Cation exchange and pozzolanic reactions reduce the plasticity index (PI) and increase unconfined compressive strength.
C.It coats clay particles with oil to prevent water absorption.
D.It converts clay minerals into organic peat.
Explanation: Adding hydrated lime to moist clay causes rapid cation exchange (calcium ions replace sodium/potassium), flocculating clay particles, lowering the Plasticity Index (PI), reducing swell potential, and forming long-term strength via pozzolanic cementitious reactions.

About the Arizona ROC A-5 Excavating, Grading and Oil Surfacing Exam

The Arizona ROC A-5 Excavating, Grading and Oil Surfacing examination is an open-book trade licensing exam administered by PSI Services LLC. Candidates have 75 minutes to answer 30 scored multiple-choice questions with a passing score of 70% (21 correct answers). The exam evaluates contractor competency across core domain areas including excavation methods, soil compaction, earthwork volume calculations, fine grading, asphalt sealcoating, surface treatments (chip seal, fog seal, slurry seal), commercial blasting safety, and OSHA construction safety standards.

Questions

30 scored questions

Time Limit

75 minutes

Passing Score

70%

Exam Fee

$66 (Arizona ROC / PSI Services LLC)

Arizona ROC A-5 Excavating, Grading and Oil Surfacing Exam Content Outline

53%

Excavation, Compaction, and Grading

Earthwork volume calculations (cut/fill, BCY/LCY/CCY), soil classification, trenching, sloping, shoring, subgrade stabilization, moisture-density relationships (Proctor tests), compaction equipment selection, and fine grading.

27%

Sealcoating

Asphalt surface preparation, crack sealing, application of asphalt emulsion sealcoats (fog seal, slurry seal, chip seal, microsurfacing), distributor truck operation, spray bar calibration, nozzle angles, and aggregate application.

10%

Blasting

Commercial explosives handling, detonators, blast pattern design (burden, spacing, subdrilling, stemming), scaled distance calculations, peak particle velocity limits, pre-blast surveys, and OSHA 1926 Subpart U compliance.

10%

OSHA Safety

OSHA 29 CFR 1926 safety regulations for heavy equipment, trench protective systems, fall protection, hazard communication, personal protective equipment (PPE), roll-over protective structures (ROPS), and traffic control.

How to Pass the Arizona ROC A-5 Excavating, Grading and Oil Surfacing 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

Arizona ROC A-5 Excavating, Grading and Oil Surfacing Study Tips from Top Performers

1Master Earthwork Calculations: Practice converting volumes between Bank Cubic Yards (BCY), Loose Cubic Yards (LCY), and Compacted Cubic Yards (CCY) using swell and shrinkage percentages.
2Understand Soil Mechanics & Compaction Tests: Memorize the differences between Standard Proctor (ASTM D698) and Modified Proctor (ASTM D1557), optimum moisture content, and field test procedures like the sand cone and nuclear density gauge.
3Know Asphalt Emulsion & Sealcoat Specs: Learn emulsion nomenclature (e.g., SS-1h, CSS-1h, CRS-2, CRS-2P), application temperature ranges, binder application rates (gal/yd²), spray bar height, nozzle angles (30 degrees), and chip seal aggregate spreading procedures.
4Memorize Blasting Formulas & Safety Rules: Understand scaled distance (SD = D / √W), peak particle velocity limits, burden (B) vs spacing (S) relationships, stemming depth, and OSHA 1926 Subpart U safety protocols.
5Review Trenching & Heavy Equipment Safety: Know OSHA Type A, B, and C soil slope ratios (20 ft max depth without PE stamp), trench shield rules, egress requirements (25 ft travel distance), utility location protocols (Arizona 811), and heavy equipment ROPS/FOPS rules.

Frequently Asked Questions

What format is the Arizona ROC A-5 examination?

The exam is a computer-administered open-book trade examination conducted at PSI testing centers. It consists of 30 scored multiple-choice questions with a time limit of 75 minutes. A passing score of 70% (21/30) is required.

What reference materials are permitted during the open-book exam?

Approved reference books bound in original publishers' covers or ring binders (such as OSHA 29 CFR 1926, Pipe & Excavation Contracting, Asphalt Paving & Maintenance manuals, and Blasting Handbooks) may be brought into the PSI testing center with tabbed notes per PSI candidate guidelines.

How are practice questions distributed across the blueprint topics?

The 100 practice questions in this bank are distributed proportionally according to the official PSI blueprint: Excavation, Compaction, and Grading (53 questions / 53%), Sealcoating (27 questions / 27%), Blasting (10 questions / 10%), and OSHA Safety (10 questions / 10%).

Do I need a separate license for business management?

Yes. In addition to passing the A-5 trade examination, qualifying parties must pass the Arizona ROC Statutes and Rules Exam (SRE) unless granted an official exemption by the Registrar.

What is the fee and scheduling procedure for PSI trade exams?

The examination fee for the A-5 trade portion is $66. Registration and scheduling can be completed online via the PSI candidate portal at test-takers.psiexams.com/azcon or by telephone.