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100+ Free AZ ROC R-13 Asphalt Paving Practice Questions

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Key Facts: AZ ROC R-13 Asphalt Paving Exam

30 Questions

Official Question Count

PSI R-13 content outline

75 Minutes

Time Limit

PSI R-13 content outline

70%

Passing Score

PSI R-13 content outline

15 of 30 items

Asphalt / Paving Weight

PSI R-13 content outline

$66

Trade Exam Fee

roc.az.gov/licensing-fees

2009 Edition

MUTCD Edition Tested

PSI R-13 reference list

The Arizona ROC R-13 Asphalt Paving Examination is 30 scored multiple-choice questions in 75 minutes, open book, at a 70% passing score with a $66 PSI exam fee, weighted 50% Asphalt / Paving and 16.7% each to Sealcoating, OSHA Safety and Traffic Control. This free bank is an English-language multiple-choice study aid weighted to those areas; it is not the official exam and does not reproduce PSI items.

Sample AZ ROC R-13 Asphalt Paving Practice Questions

Try these sample questions to test your AZ ROC R-13 Asphalt Paving exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1What is the primary objective of compacting a subgrade soil prior to placing the aggregate base course?
A.To increase soil dry density, load-bearing strength, and stability while reducing settlement and permeability
B.To retain soil moisture so the subgrade remains soft and flexible under traffic
C.To create a slick, polished surface that prevents mechanical interlock with aggregate
D.To decrease the soil dry density to allow maximum subsurface water infiltration
Explanation: Compacting the subgrade increases the dry density of the soil, which significantly elevates its load-bearing capacity (CBR value), reduces future structural settlement, and lowers permeability to protect against moisture intrusion.
2In soil compaction testing, what does the Optimum Moisture Content (OMC) represent?
A.The moisture content at which a soil reaches its maximum dry density for a specific compaction effort
B.The maximum amount of water a soil can absorb before becoming completely saturated
C.The moisture level at which soil begins to act as a liquid under vibrations
D.The minimum moisture content required to prevent dust generation during excavation
Explanation: Optimum Moisture Content (OMC) is the specific moisture percentage at which soil particles lubricate sufficiently to reorient into the densest possible arrangement under a standardized compaction effort, achieving maximum dry density.
3Which laboratory test procedure is standardly used to establish the maximum dry density and optimum moisture content of subgrade soils?
A.Standard Proctor Test (ASTM D698 / AASHTO T 99)
B.Los Angeles Abrasion Test (ASTM C131)
C.Marshall Stability Test (ASTM D6927)
D.Benkelman Beam Deflection Test (AASHTO T 256)
Explanation: The Standard Proctor Test (ASTM D698) drops a 5.5-lb rammer from a height of 12 inches into a standardized mold to determine the moisture-density curve, maximum dry density, and optimum moisture content of soils.
4What is the primary purpose of proof rolling a completed subgrade with a heavy pneumatic-tired roller or loaded tandem truck?
A.To locate soft, yielding, or pumping areas in the subgrade prior to base placement
B.To seal the surface layer against rain penetration for long-term storage
C.To crush oversized aggregate particles on the subgrade surface
D.To measure the exact moisture content of the subgrade in real time
Explanation: Proof rolling applies a heavy concentrated wheel load (typically a 30-ton loaded dump truck or pneumatic roller) across the subgrade to visually identify unstable, soft, or pumping soils that require undercutting or stabilization.
5What does the Plasticity Index (PI) of a subgrade soil measure?
A.The range of moisture content over which the soil behaves plastically (PI = Liquid Limit - Plastic Limit)
B.The ratio of coarse aggregate to fine clay particles in the soil mass
C.The percentage of soil volume occupied by trapped air voids after compaction
D.The speed at which water drains through a saturated soil column
Explanation: The Plasticity Index (PI) is the numerical difference between the Liquid Limit (LL) and Plastic Limit (PL). High PI values indicate clayey soils susceptible to expansion, shrinking, and swelling upon moisture changes.
6What is the standard minimum recommended cross-slope for a subgrade surface on residential pavement projects to ensure effective drainage?
A.2.0% (1/4 inch per foot)
B.0.5% (1/16 inch per foot)
C.5.0% (5/8 inch per foot)
D.10.0% (1-1/4 inches per foot)
Explanation: A minimum 2.0% cross-slope (equivalent to 1/4 inch fall per foot) allows surface water to shed efficiently off the subgrade layer, preventing water accumulation that weakens subgrade support.
7Which chemical stabilization additive is most effective for treating highly plastic, expansive clay subgrades commonly encountered in Arizona?
A.Hydrated lime (or quicklime)
B.Sodium chloride (rock salt)
C.Calcium silicate powder
D.Asphalt emulsion CSS-1h
Explanation: Hydrated lime reacts chemically with plastic clay minerals (cation exchange and pozzolanic reactions), reducing the Plasticity Index (PI), shrinking/swelling potential, and dramatically improving workability and strength.
8When unsuitable, soft organic soil or high-moisture mud is encountered during subgrade excavation, what is the proper remedial action?
A.Undercut and remove the unsuitable soil, then backfill with approved structural fill or aggregate
B.Compact the organic mud repeatedly until it hardens
C.Cover the organic mud with a thin layer of sand and pave immediately
D.Sprinkle dry cement on top without excavation and roll
Explanation: Unsuitable soils containing organic matter or excessive moisture cannot achieve structural stability. They must be excavated (undercut) down to competent soil and replaced with compacted structural aggregate base or select granular backfill.
9Why is a well-graded Aggregate Base Course (ABC) containing a balanced range of coarse and fine particles preferred over a uniformly sized aggregate?
A.Smaller particles fill interparticle voids between coarse stones, yielding higher compacted density and load distribution
B.Uniform aggregate requires less compaction effort and zero moisture control
C.Well-graded aggregate retains 50% more water to cushion heavy truck tires
D.Uniform aggregate prevents all subgrade settlement by floating on top of clay
Explanation: Well-graded aggregate blends varying particle sizes (from 3/4-inch stone down to fines) so that smaller particles fill the spaces between larger stones, creating a dense interlocked matrix with high stability and load-carrying capacity.
10What is the primary structural function of installing a woven or non-woven geotextile fabric between a soft subgrade and the aggregate base course?
A.Prevents fine subgrade soil particles from pumping up into the base aggregate while allowing water drainage
B.Replaces the need for any asphalt binder in the surface layer
C.Heats the subgrade soil during winter freezing cycles to prevent frost heave
D.Acts as a vapor barrier to completely block ground moisture from evaporating
Explanation: Geotextile fabrics act as a separation and filtration barrier. They prevent soft subgrade clay or silt fines from migrating upward (pumping) into the clean aggregate base course under traffic loads while allowing groundwater to pass through.

About the AZ ROC R-13 Asphalt Paving Exam

The Arizona ROC R-13 Asphalt Paving Examination is the open-book, computer-delivered PSI trade exam for the Arizona Registrar of Contractors R-13 classification, which allows installation and repair of paved areas using materials and methods common to the industry, including asphalt curbs, concrete bumper curbs, headers and striping. The official outline runs 30 scored questions in 75 minutes at a 70% passing score: Asphalt / Paving 15, Sealcoating 5, OSHA Safety 5, and Traffic Control, Signs, Striping 5. It is a distinct blueprint from the A-14/CR-69 Asphalt Paving exam, which adds excavation and concrete areas.

Assessment

One 30-question open-book multiple-choice trade examination, 75 minutes, 70% to pass, across four subject areas: Asphalt / Paving 15, Sealcoating 5, OSHA Safety 5, and Traffic Control, Signs, Striping 5.

Time Limit

75 minutes

Passing Score

70%

Exam Fee

$66 (Arizona ROC / PSI Services LLC)

AZ ROC R-13 Asphalt Paving Exam Content Outline

50%

Asphalt / Paving

Asphalt binder grades and emulsions, mix design and volumetrics, tack and prime coats, base and subgrade preparation, paver laydown and joints, rolling and compaction, and asphalt curbs and headers.

16.7%

Sealcoating

Surface preparation and oil-spot priming, asphalt emulsion versus coal tar sealers, sand loading and application rates, crack routing and hot-pour sealing, fog seals and slurry/microsurfacing.

16.7%

OSHA Safety

29 CFR 1926 construction requirements for paving crews: PPE and hot-asphalt burn first aid, heavy-equipment and backing hazards, excavation protective systems, silica controls, and heat illness.

16.7%

Traffic Control, Signs, Striping

MUTCD (2009 edition) temporary traffic control zones and tapers, flagger stations and devices, signs and channelizing devices, night work lighting, and pavement marking layout and materials.

How to Pass the AZ ROC R-13 Asphalt Paving Exam

What You Need to Know

  • Passing score: 70%
  • Assessment: One 30-question open-book multiple-choice trade examination, 75 minutes, 70% to pass, across four subject areas: Asphalt / Paving 15, Sealcoating 5, OSHA Safety 5, and Traffic Control, Signs, Striping 5.
  • 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 R-13 Asphalt Paving Study Tips from Top Performers

1Half the exam is Asphalt / Paving - binders, mix design, tack and prime coats, laydown, joints and compaction. Start there.
2OSHA Safety and Traffic Control are 5 items each, the same weight as Sealcoating. Do not treat them as filler topics.
3Traffic-control questions follow the 2009 MUTCD: taper length L = W x S for speeds 45 mph and above, and L = W x S-squared / 60 below 45 mph.
4Know the sealcoat side: surface cleaning and oil-spot priming, sand loading, crack routing shape factor, and asphalt emulsion versus coal tar PAH content.
5Practice tonnage and area math - 110 lb per square yard per inch of thickness, 9 square feet per square yard, and 27 cubic feet per cubic yard.

Frequently Asked Questions

How many questions are on the Arizona ROC R-13 Asphalt Paving exam?

The PSI R-13 content outline lists 30 scored multiple-choice questions with 75 minutes of testing time and a 70% passing score.

How is R-13 different from the A-14 Asphalt Paving exam?

Different blueprints. R-13 is Asphalt / Paving 15, Sealcoating 5, OSHA Safety 5 and Traffic Control, Signs, Striping 5. A-14 (and CR-69) is Asphalt / Paving 10, Excavation, Compaction and Grading 6, Sealcoating 4, Concrete 4, OSHA Safety 3 and Traffic Control 3.

Which MUTCD edition does the R-13 exam use?

PSI's R-13 reference list names the Manual on Uniform Traffic Control Devices for Streets and Highways, 2009 edition. Traffic-control questions are scored against that edition's Part 6 numbering.

What references can I bring to the R-13 exam?

29 CFR Part 1926 (OSHA), Construction Planning, Equipment, and Methods (2018), the Excavation and Grading Handbook (3rd ed.), the Hot-Mix Asphalt Paving Handbook (2000), the 2009 MUTCD, and Pipe and Excavation Contracting (2011), bound and tabbed with permanent tabs only.

How much does the R-13 exam cost?

The trade exam fee is $66 paid to PSI, plus $61 for the mandatory Arizona Statutes and Rules Training Course and Exam paid to Gmetrix.