Hawaii Cement Concrete Contractor (C-31A) Exam - Online Practice Questions

Prepare for the Hawaii Cement Concrete Contractor (C-31A) examination with online practice questions designed to reinforce estimating, site preparation, layout, formwork, reinforcing steel, concrete mixtures, placement, finishing, specialty concrete, and OSHA construction safety.

This online practice-question product includes 3 months access, giving candidates time to strengthen concrete knowledge, practice construction calculations, review material properties, identify weaker subjects, and develop a consistent study routine before taking the official Hawaii C-31A contractor examination.

The Hawaii C-31A Cement Concrete Contractor classification covers work involving mixing aggregates, cement, and water to produce acceptable concrete; placing and finishing concrete; setting screeds and forms; performing concrete-related caulking and tuckpointing; cutting, drilling, sawing, coring, and pressure grouting concrete; and performing other concrete surface and repair work within the classification.

The classification also includes sandblasting, waterblasting, cleaning, sealing, epoxy injection of concrete, and spall repair. Candidates should therefore prepare for more than basic slab placement. The examination covers the materials, methods, preparation, reinforcement, formwork, safety, and quality-control knowledge required for professional concrete work.

The official Hawaii C-31A trade examination contains 70 questions. Candidates receive 120 minutes, or 2 hours, to complete the examination and must achieve a minimum passing score of 75%.

This examination is CLOSED book. The technical references listed with this product are intended for preparation and are not allowed in the examination center. Candidates should use them to build strong working knowledge before test day and then practice applying that knowledge without relying on immediate reference lookup.

Study references include the International Building Code, 2018, Carpentry and Building Construction, 2016, The Contractor's Guide to Quality Concrete Construction, 4th Edition, Design and Control of Concrete Mixtures, 16th Edition, and Code of Federal Regulations - 29 CFR Part 1926 (OSHA).

Exam Details

The Hawaii Cement Concrete Contractor C-31A examination contains 70 questions. Candidates receive 120 minutes to complete the test, and the minimum passing score is 75%.

The official examination content outline includes:

• Estimating: 5 questions
• Site Preparation Including Layout: 12 questions
• Formwork: 10 questions
• Reinforcing Steel: 8 questions
• General Concrete Including Mixes, Placement, and Specialty Concrete: 30 questions
• Safety - OSHA: 5 questions

General Concrete is by far the largest section of the exam, accounting for 30 of the 70 questions. Candidates should devote substantial study time to concrete materials, mixture characteristics, placement, consolidation, finishing, curing, joints, specialty applications, repairs, and overall quality practices.

Site Preparation Including Layout accounts for 12 questions. This section can involve grades, elevations, slab and foundation preparation, excavation coordination, dimensions, positioning, and preparation of surfaces before concrete placement.

Formwork accounts for 10 questions, while Reinforcing Steel accounts for 8. Estimating and OSHA Safety each contribute 5 questions.

Because General Concrete represents nearly half of the examination, candidates should build a strong foundation in concrete technology while still preparing carefully for layout, forms, reinforcement, estimating, and safety.

Closed Book Test

This examination is CLOSED book.

The listed technical reference materials are intended for study and are not allowed in the examination center.

Closed-book testing places greater emphasis on understanding and recall. Candidates should be able to recognize proper concrete practices, material characteristics, formwork concepts, reinforcing requirements, estimating procedures, and safety principles without searching through a reference during the examination.

A productive study method is to review a topic using the appropriate reference and then complete practice questions without immediately reopening the book. After completing the question set, return to the reference to investigate mistakes and reinforce the underlying principle.

Concrete questions often test practical relationships. For example, water content, aggregate characteristics, cementitious materials, temperature, placement methods, consolidation, finishing, and curing can all influence concrete performance.

With 70 questions and 120 minutes, candidates have an average of approximately 1 minute and 43 seconds per question. Efficient recall is important, especially when calculation and scenario-based questions require additional time.

Licensing Steps

1. Confirm the C-31A classification matches your intended scope of work. Hawaii identifies C-31A as the Cement Concrete Contractor classification.
2. Complete the applicable Hawaii contractor license application. Contractor licensing is handled through the Hawaii Department of Commerce and Consumer Affairs, Professional and Vocational Licensing Division.
3. Document qualifying experience. Applicants must demonstrate experience that satisfies the Contractors License Board requirements for the C-31A classification.
4. Receive Contractors License Board approval. Applicants must receive approval before registering for the required examination.
5. Register for the examination. Approved candidates complete examination registration through the testing process designated for Hawaii contractor examinations.
6. Prepare for the C-31A trade examination. Review estimating, site preparation, layout, formwork, reinforcing steel, concrete mixtures, placement, finishing, specialty concrete, and OSHA safety.
7. Pass the C-31A trade examination. The current test contains 70 questions, allows 120 minutes, and requires a 75% passing score.
8. Complete the applicable Business and Law examination. New Hawaii contractor applicants must also satisfy the Business and Law examination requirement when applicable.
9. Complete remaining licensing requirements. Applicants must satisfy all applicable Contractors License Board requirements before a contractor license is issued.

State Requirements

Hawaii contractor licensing is regulated by the Contractors License Board under the Department of Commerce and Consumer Affairs, Professional and Vocational Licensing Division.

The C-31A Cement Concrete Contractor classification authorizes work involving the production, placement, finishing, repair, treatment, cutting, drilling, and related handling of concrete within the scope established by Hawaii's contractor classification rules.

The classification includes mixing aggregates, cement, and water to produce acceptable concrete; placing and finishing concrete; and setting screeds and forms.

It also includes tuckpointing and caulking of concrete block and precast stone, caulking metal to concrete and masonry, concrete cutting, drilling, sawing, coring, and pressure grouting.

Additional C-31A work includes sandblasting, waterblasting, cleaning, sealing, epoxy injection of concrete, and spall repair.

Applicants must receive Contractors License Board approval before proceeding with the required contractor examination process.

Passing the C-31A trade examination alone does not automatically issue a Hawaii contractor license. Applicants must also satisfy the applicable experience, Business and Law examination, application, financial, insurance, entity, and other licensing requirements established by the Board.

Reference Books

• International Building Code, 2018
  Supports preparation involving concrete-related building requirements, foundations, structural concepts, materials, special inspections, and general construction provisions relevant to cement concrete work.
• Carpentry and Building Construction, 2016
  Supports preparation involving construction layout, formwork, foundations, slabs, measurements, estimating, site preparation, building methods, and coordination of concrete with other construction operations.
• The Contractor's Guide to Quality Concrete Construction - 4th Edition
  Supports study involving concrete planning, materials, formwork, reinforcement, placement, consolidation, finishing, curing, joints, weather conditions, quality practices, and problem prevention.
• Design and Control of Concrete Mixtures, Steven H. Kosmatka, William C. Panarese, 16th Edition
  Supports preparation involving concrete materials, mixture design concepts, water-cementitious relationships, aggregates, admixtures, workability, strength, durability, air entrainment, and concrete performance.
• Code of Federal Regulations - 29 CFR Part 1926 (OSHA)
  Supports preparation involving construction safety, concrete and masonry operations, personal protective equipment, formwork, reinforcing steel, equipment, fall hazards, tools, material handling, and other OSHA construction requirements.

Test Information and Study Materials

A strong Hawaii C-31A preparation plan should begin with General Concrete Including Mixes, Placement, and Specialty Concrete, which represents 30 questions and is the dominant examination category.

Review the basic ingredients of concrete and understand the function of cementitious materials, water, fine aggregate, coarse aggregate, and admixtures.

Candidates should understand that changing one component of a concrete mixture can affect workability, strength, durability, setting characteristics, finishing, and overall performance.

Water content deserves focused attention. Excessive water can make fresh concrete easier to place while negatively affecting important hardened-concrete properties. Candidates should understand the relationship between water, cementitious materials, workability, and strength.

Review aggregates, including grading, cleanliness, moisture, particle characteristics, and their role in the concrete mixture. Aggregate makes up a substantial portion of concrete and directly influences workability, economy, and performance.

Admixtures should also be reviewed. Understand the purposes of admixtures used to modify setting, workability, air content, water demand, or other properties.

The Design and Control of Concrete Mixtures reference is especially useful for strengthening the material-science portion of preparation. Use it to understand why concrete behaves differently under changing mixture and environmental conditions.

Concrete placement should include preparation before the pour, delivery, depositing, consolidation, and avoiding conditions that can negatively affect the completed work.

Concrete should be placed in a manner that reduces segregation and allows the material to fill forms and surround reinforcement properly.

Consolidation is an important concept. Candidates should understand why concrete must be consolidated and how inadequate or excessive consolidation can affect finished work.

Concrete finishing should include screeding, floating, edging, jointing, troweling, and other operations applicable to the surface being constructed.

Finishing operations should be performed at appropriate stages. Candidates should understand that timing and surface conditions can affect the quality of the final finish.

Curing should receive substantial review. Proper curing supports continued cement hydration and helps concrete develop its intended properties. Study common curing principles and conditions that can lead to premature moisture loss.

Review concrete placement during hot and cold weather. Temperature can affect setting, strength development, evaporation, finishing time, and curing requirements.

Joints are another important concrete subject. Understand the purpose of contraction, construction, and isolation-related joints and how joints help manage movement and cracking.

Specialty concrete can involve different materials, placement methods, repairs, surface treatments, and applications. Candidates should be prepared to apply broad concrete principles rather than relying solely on ordinary slab examples.

The C-31A scope includes spall repair and epoxy injection. Study concrete deterioration and repair concepts, including preparation of damaged areas and the importance of selecting an appropriate repair method.

Site Preparation Including Layout accounts for 12 questions. Candidates should understand grades, elevations, benchmarks, layout lines, excavation conditions, subgrade preparation, and positioning of slabs, footings, and other concrete work.

Good concrete cannot compensate for poor site preparation. Subgrades and base materials should provide suitable support, drainage, and consistency for the intended concrete placement.

Practice reading dimensions and elevations and understanding how they translate from drawings to field layout.

Formwork represents 10 questions. Review form materials, dimensions, bracing, supports, ties, release methods, alignment, stripping, and the loads forms experience during concrete placement.

Forms must be strong and stable enough to maintain the intended dimensions while supporting fresh concrete and construction operations.

Study screeds as part of placement preparation. Hawaii's C-31A scope specifically includes setting screeds and forms.

Reinforcing Steel accounts for 8 questions. Review reinforcing bar terminology, placement, cover, spacing, laps, supports, chairs, ties, dowels, and coordination with formwork and concrete placement.

Reinforcement must remain in the specified location during concrete placement. Moving or improperly supported steel can affect the behavior of the finished concrete element.

Understand the importance of concrete cover. Reinforcement location affects structural performance and protection of steel from environmental exposure.

Estimating accounts for 5 questions. Candidates should practice concrete quantity calculations involving slabs, footings, walls, columns, and other common concrete elements.

Be comfortable calculating cubic volume from length, width, and thickness or depth. Maintain consistent units and convert the final result into the units requested.

Estimating may also involve materials, form quantities, reinforcement, and dimensions. Read every problem carefully before starting the calculation.

For irregular concrete elements, divide the work into simpler shapes when appropriate and calculate each portion separately.

Safety - OSHA contributes 5 questions. Review 29 CFR Part 1926 requirements relevant to concrete construction, tools, forms, reinforcement, personal protective equipment, fall hazards, material handling, and jobsite conditions.

Concrete operations can expose workers to heavy equipment, moving trucks, pumps, reinforcing steel, formwork loads, power tools, wet cement, silica dust, and elevated work.

Wet cement and concrete can create skin and eye hazards. Candidates should understand the importance of appropriate personal protective equipment and safe handling practices.

Cutting, drilling, sawing, and grinding concrete can generate respirable crystalline silica. The C-31A classification specifically includes concrete cutting and related work, making dust-control and safety knowledge particularly relevant.

Reinforcing steel can also create impalement and handling hazards. Review safe practices around exposed reinforcing bars and reinforcement installation.

Formwork should be treated as a temporary structural system. Improperly supported forms can fail during placement, creating severe hazards for workers and damaging the concrete work.

Use The Contractor's Guide to Quality Concrete Construction to connect material knowledge with actual jobsite practices. Study planning, preparation, placement, finishing, and curing as one continuous process.

Use Carpentry and Building Construction for formwork, layout, foundations, dimensions, and general construction sequencing.

Use the International Building Code, 2018 to reinforce broader construction concepts that affect structural concrete and foundation work.

Because the examination is closed book, gradually reduce your dependence on the references. After reviewing a subject, work practice questions from memory and return to the reference only after completing the set.

When a practice question is missed, determine whether the cause was concrete technology, placement technique, reinforcement, formwork, estimating, layout, terminology, or safety.

Track recurring mistakes by category. Since General Concrete represents 30 questions, repeated weakness in mixture design, placement, finishing, or curing should receive immediate attention.

As examination day approaches, transition to mixed-topic practice that requires switching between concrete technology, site layout, formwork, reinforcing steel, estimating, and OSHA safety.

The included 3 months access provides time to progress from individual-topic study into calculation practice, weak-area correction, mixed-question review, and exam-oriented preparation.

How 1 Exam Prep Helps You Reach Your Goal

1 Exam Prep supports Hawaii Cement Concrete Contractor candidates through organized study guidance, concrete-focused review, practice-oriented preparation, construction calculations, and confidence-building study structure.

The online practice questions help candidates actively apply concrete concepts instead of relying only on passive reading. Practice can reinforce mixtures, placement, finishing, site preparation, formwork, reinforcing steel, estimating, repairs, specialty concrete, and OSHA safety.

Because the official Hawaii C-31A examination is closed book, repeated practice can help strengthen recall and the ability to apply concrete principles without immediately consulting technical references.

The listed study books can be used to investigate missed questions, understand why an answer is correct, and reinforce difficult concepts before returning to closed-book practice.

Calculation-oriented preparation helps candidates strengthen confidence with concrete quantities, dimensions, site layout, and other practical estimating problems.

With 3 months access included, candidates can establish a consistent study schedule, revisit difficult concrete subjects, practice calculations, and build familiarity with the complete C-31A examination content.

The goal is to help candidates approach the Hawaii C-31A Cement Concrete Contractor examination with stronger concrete knowledge, better construction judgment, improved calculation skills, greater safety awareness, and a structured preparation process without guaranteeing a passing score or Hawaii contractor license.

How many questions are on the Hawaii C-31A exam?

The Hawaii Cement Concrete Contractor C-31A examination contains 70 questions.

How much time is allowed for the Hawaii C-31A examination?

Candidates receive 120 minutes, or 2 hours, to complete the examination.

What score is required to pass the Hawaii C-31A exam?

The minimum passing score is 75%.

Is the Hawaii Cement Concrete Contractor exam open book?

No. This examination is CLOSED book.

What is the largest category on the C-31A exam?

General Concrete, including mixes, placement, and specialty concrete, is the largest category with 30 questions.

Does the C-31A exam cover site preparation and layout?

Yes. Site Preparation Including Layout accounts for 12 questions.

Does the examination cover concrete formwork?

Yes. Formwork accounts for 10 questions.

Does the exam cover reinforcing steel?

Yes. Reinforcing Steel accounts for 8 questions.

Does the C-31A examination include estimating?

Yes. Estimating accounts for 5 questions.

Does the exam include OSHA safety?

Yes. Safety - OSHA accounts for 5 questions.

Can a Hawaii C-31A contractor place and finish concrete?

Yes. Mixing, placing, and finishing cement concrete are part of the C-31A classification scope.

Can a C-31A contractor cut, drill, saw, and core concrete?

Yes. Cutting, drilling, sawing, and coring concrete are included within the Hawaii C-31A classification.

Does the C-31A scope include concrete spall repair?

Yes. Spall repair is included within the Hawaii C-31A Cement Concrete Contractor classification.

Does the classification include epoxy injection?

Yes. Epoxy injection of concrete is included within the C-31A scope.

What books should I study for the C-31A exam?

The study references include the 2018 International Building Code, Carpentry and Building Construction, The Contractor's Guide to Quality Concrete Construction, Design and Control of Concrete Mixtures, and 29 CFR Part 1926 OSHA construction regulations.

How long do I have access to the online practice questions?

This product includes 3 months access.

Does passing the C-31A exam automatically issue a Hawaii contractor license?

No. Applicants must also satisfy Hawaii's applicable experience, Business and Law examination, application, financial, insurance, and other Contractors License Board requirements.

Does this product guarantee that I will pass the Hawaii C-31A examination?

No. These online practice questions are designed to support organized preparation. Examination performance depends on each candidate's study, concrete experience, construction knowledge, estimating skills, safety awareness, and performance on test day.