Hawaii Excavating, Grading And Trenching Contractor (C-17) Exam - Online Practice Questions

Prepare for the Hawaii Excavating, Grading and Trenching Contractor (C-17) examination with online practice questions designed to reinforce excavation techniques, grading, trenching, compaction, soil properties, estimating, retaining walls, blasting, shoring, and OSHA construction safety.

This online practice-question product includes 3 months access, giving candidates time to review excavation and earthwork concepts, practice construction calculations, identify weaker topics, strengthen safety knowledge, and develop a consistent study routine before taking the official Hawaii C-17 contractor examination.

Hawaii defines the C-17 Excavating, Grading and Trenching Contractor classification as work involving digging, moving, and placing earthen material for cuts, fills, grades, or trenches, including the use of explosives in connection with that work. The classification is therefore centered on earthmoving operations and the practical knowledge required to perform them safely and effectively.

The official C-17 trade examination is administered by PSI Services LLC for the Hawaii Department of Commerce and Consumer Affairs, Professional and Vocational Licensing Division. Applicants must receive approval from the Hawaii Contractors License Board before registering for the examination.

The current Hawaii C-17 examination contains 40 questions. Candidates receive 120 minutes, or 2 hours, to complete the examination. The minimum passing score is 75%.

This examination is CLOSED book. The technical references used to prepare for the examination are not permitted in the examination center. Candidates should use their study books before test day to understand excavation principles, soil behavior, earthwork calculations, trench protection, retaining structures, and construction safety well enough to apply those concepts without relying on reference lookup during the test.

This product uses the International Building Code, 2018, Principles and Practices of Commercial Construction, 11th Edition, Modern Masonry - Brick, Block, Stone by Clois E. Kicklighter, 10th Edition, Pipe and Excavation Contracting, and Code of Federal Regulations - 29 CFR Part 1926 (OSHA) as study references.

Exam Details

The Hawaii C-17 Excavating, Grading and Trenching Contractor examination contains 40 questions. Candidates receive 120 minutes to complete the examination and must achieve a minimum score of 75% to pass.

The official examination content outline includes:

• Equipment/Technique: 6 questions
• Compaction: 7 questions
• Soil Types and Stability: 7 questions
• Estimating: 7 questions
• Retaining Walls: 4 questions
• Blasting: 2 questions
• Shoring: 3 questions
• OSHA Safety: 4 questions

Compaction, Soil Types and Stability, and Estimating are the largest individual examination categories, with 7 questions each. Together, they represent more than half of the 40-question test.

Equipment and Technique contributes another 6 questions. Candidates should understand the basic capabilities and applications of excavation and grading equipment as well as common methods for moving, placing, and shaping earth materials.

Retaining Walls account for 4 questions, while OSHA Safety also accounts for 4 questions. Shoring contributes 3 questions, and Blasting contributes 2 questions.

Because the examination contains only 40 questions, every category can have a meaningful effect on the final score. Candidates should avoid concentrating exclusively on one area even when they have extensive field experience in that subject.

Closed Book Test

This examination is CLOSED book.

The reference materials associated with the Hawaii C-17 examination are intended for study and are not allowed in the examination center.

Closed-book preparation should emphasize understanding rather than simply locating information. Candidates should be able to recognize soil conditions, select appropriate excavation techniques, understand compaction principles, calculate earthwork quantities, identify trench hazards, and apply construction safety concepts without searching a reference during the test.

Study each topic with the reference materials first, then work practice questions without looking up the answer immediately. After completing a set, return to the appropriate reference to investigate missed concepts.

Because candidates receive 120 minutes for 40 questions, the examination allows an average of approximately 3 minutes per question. Familiar concepts can often be answered more quickly, preserving time for calculations and more detailed soil, estimating, or safety questions.

Licensing Steps

1. Confirm that the C-17 classification matches your intended work. Hawaii defines C-17 as excavating, grading, and trenching work involving the movement and placement of earthen material.
2. Complete the applicable contractor license application. Applications are submitted through the Hawaii Department of Commerce and Consumer Affairs, Professional and Vocational Licensing Division.
3. Document qualifying experience. Applicants must demonstrate qualifying supervisory experience within the scope of the C-17 classification.
4. Receive Contractors License Board approval. The Board must approve an applicant before examination registration is allowed.
5. Register with PSI after approval. Eligible candidates receive instructions for scheduling the required examination or examinations.
6. Prepare for the C-17 trade examination. Study equipment, compaction, soils, estimating, retaining walls, blasting, shoring, and OSHA safety.
7. Pass the C-17 examination. The current test contains 40 questions, allows 120 minutes, and requires a 75% passing score.
8. Complete the applicable Business and Law examination. New contractor applicants must satisfy Hawaii's Business and Law examination requirement when applicable.
9. Complete remaining licensing requirements. All applicable Contractors License Board requirements must be satisfied 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-17 classification authorizes a contractor to dig, move, and place earthen material for a cut, fill, grade, or trench, including the use of explosives in connection with that work.

The classification can therefore include substantial earthmoving and excavation operations, but contractors remain responsible for working within the authorized scope of their license and coordinating other regulated trades when a project requires work outside that scope.

Hawaii's Contractors License Board evaluates applicants' experience in relation to the classification sought. For C-17 applications, qualifying experience should reflect actual supervisory work involving excavation, grading, trenching, and related activities within the broad scope of the classification.

Board records addressing C-17 applications show an emphasis on documenting 48 months of qualifying on-site supervisory experience involving the applicant's own employees performing work within the C-17 scope.

Applicants must receive approval before registering for the contractor examination with PSI. Once approved, examination eligibility is valid for six months. Applicants who fail to complete the required examinations during the eligibility period must reapply for examination eligibility.

Passing the C-17 examination does not by itself issue a Hawaii contractor license. Applicants must also satisfy the applicable experience, Business and Law examination, financial, insurance, entity, application, and other requirements established by the Contractors License Board.

Reference Books

• International Building Code, 2018
  Supports study involving building-code concepts related to soils, foundations, grading, excavation, retaining structures, site conditions, and other construction requirements that can affect earthwork operations.
• Principles and Practices of Commercial Construction, 11th Edition
  Supports preparation involving construction methods, equipment, sitework, excavation, foundations, materials, estimating, project sequencing, and general commercial construction practices.
• Modern Masonry - Brick, Block, Stone, Clois E. Kicklighter, 10th Edition
  Supports preparation involving masonry construction and retaining wall concepts, including materials, units, mortar, reinforcement, wall construction, and related masonry practices.
• Pipe and Excavation Contracting
  Supports study involving excavation equipment, trenching methods, pipe-related excavation, soils, grading, estimating, earthwork quantities, shoring, and practical excavation operations.
• Code of Federal Regulations - 29 CFR Part 1926 (OSHA)
  Supports preparation for construction safety requirements involving excavations, trenches, protective systems, access and egress, equipment, fall hazards, material handling, and other OSHA construction requirements.

Test Information and Study Materials

A strong Hawaii C-17 study plan should give substantial attention to Compaction, Soil Types and Stability, and Estimating. Each of these categories contains 7 questions and together they account for 21 of the 40 examination questions.

Compaction is essential to grading, backfilling, embankment construction, trenches, and foundation preparation. Candidates should understand why soil is compacted and how moisture content, soil type, equipment, lift thickness, and compactive effort can affect the finished result.

Review different types of compaction equipment and the conditions in which they are commonly used. Granular soils and cohesive soils do not necessarily respond to the same methods or equipment.

Understand the importance of placing fill in manageable lifts. Attempting to compact excessive material thickness at one time can reduce the effectiveness of the compaction operation.

Soil Types and Stability are another major category. Candidates should understand basic soil classifications, cohesive and granular materials, moisture effects, excavation stability, and how changing site conditions can affect trench walls and slopes.

Soil behavior directly affects excavation safety. Water, vibration, surcharge loads, previously disturbed material, weather, and adjacent construction can change the stability of an excavation.

Candidates should understand that a trench that initially appears stable can become hazardous as site conditions change. Continuous observation and proper protective measures are important parts of excavation operations.

Estimating represents 7 questions. Practice calculating excavation volumes, fill quantities, trench dimensions, material movement, and common earthwork quantities.

Be comfortable with length, width, depth, area, and volume calculations. Earthwork questions may require candidates to interpret dimensions and convert between units before determining a final quantity.

Keep units consistent. Cubic feet and cubic yards are common in excavation work, and candidates should know how to convert quantities accurately.

Estimating should also include an understanding that excavated material can change in volume when removed, handled, compacted, or placed. Practical earthwork planning requires awareness of the condition of the material throughout the process.

Equipment and Technique account for 6 questions. Review excavators, backhoes, loaders, bulldozers, graders, compactors, trucks, and other equipment commonly used for earthwork.

Rather than memorizing equipment names only, understand what each machine is designed to do. Consider digging depth, reach, pushing, loading, fine grading, hauling, trenching, and compaction functions.

Equipment selection affects productivity, safety, and cost. The machine that performs one operation efficiently may not be the best choice for another task.

Study basic grading concepts, including cuts, fills, elevations, slopes, drainage, and preparation of subgrades. Grading work should create the intended site configuration while maintaining suitable drainage and support conditions.

Retaining Walls represent 4 questions. Review basic retaining wall principles, lateral earth pressure, drainage, foundations, backfill, reinforcement, and stability.

Water behind a retaining wall can create additional pressure. Proper drainage and backfill practices are therefore important to retaining wall performance.

Use the International Building Code and masonry study material to reinforce concepts involving retaining structures, foundations, materials, and construction methods.

Shoring accounts for 3 questions and is closely related to soil stability and OSHA safety. Candidates should understand why protective systems are used and how trench conditions determine the need for protection.

Review the basic concepts of sloping, benching, shoring, and shielding. These methods address excavation hazards in different ways and should not be treated as interchangeable terms.

A trench shield, for example, is intended to protect workers within the shielded area. Shoring systems support excavation faces to help prevent movement. Sloping and benching alter the geometry of the excavation.

OSHA Safety represents 4 questions. Use 29 CFR Part 1926 to study construction and excavation safety concepts, including trench hazards, protective systems, access and egress, spoil placement, underground utilities, equipment hazards, and competent-person responsibilities.

Excavation work can expose workers to cave-ins, falling loads, mobile equipment, hazardous atmospheres, water accumulation, and underground utility hazards. Candidates should understand the methods used to recognize and control these risks.

Safe access and egress is an important trenching concept. Workers should not have to improvise unsafe methods for entering or leaving an excavation.

Review the effect of spoils and surcharge loads near trench edges. Materials and equipment placed too close to an excavation can increase loading and create additional hazards.

Underground utility location should also be part of excavation planning. Digging without appropriate utility information can expose workers and the public to severe electrical, gas, communication, or other infrastructure hazards.

Blasting represents 2 questions. Although it is the smallest exam category, blasting is explicitly included within Hawaii's C-17 classification when used in connection with excavation, grading, or trenching.

Candidates should understand basic blasting safety concepts, controlled handling of explosives, site protection, and the importance of qualified personnel and proper procedures.

Because this is a closed-book examination, preparation should gradually shift away from immediate reference lookup. Study a topic first, then answer practice questions from memory before reviewing the reference again.

Use Pipe and Excavation Contracting for practical excavation methods, equipment, trenching, estimating, and field-oriented concepts. Connect those concepts with the OSHA rules that govern safe excavation work.

Use Principles and Practices of Commercial Construction to strengthen broader construction knowledge involving sitework, foundations, equipment, sequencing, and estimating.

Use Modern Masonry for retaining wall and masonry-related principles, and use the International Building Code to reinforce building requirements affecting soils, foundations, retaining structures, and site conditions.

When a practice question is missed, determine whether the error involved soil behavior, a calculation, equipment selection, safety, terminology, or construction technique.

Create separate review groups for recurring weak areas. If compaction questions are difficult, focus on soil type, moisture, equipment, and lift placement. If estimating is weaker, practice earthwork calculations regularly.

As test day approaches, use mixed-topic practice that moves between soil stability, compaction, estimating, equipment, retaining walls, shoring, blasting, and OSHA safety.

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

How 1 Exam Prep Helps You Reach Your Goal

1 Exam Prep supports Hawaii Excavating, Grading and Trenching Contractor candidates through organized study guidance, trade-focused review, practice-oriented preparation, construction calculations, and confidence-building study structure.

The online practice questions help candidates apply excavation knowledge instead of relying only on passive reading. Practice can reinforce soil types, compaction, grading, earthmoving equipment, trenching, estimating, retaining walls, shoring, blasting, and OSHA safety.

Because the official C-17 examination is closed book, repeated practice can help strengthen recall and improve the ability to apply field concepts without depending on immediate access to technical references.

Calculation-oriented practice helps candidates become more comfortable working with excavation dimensions, volume, grading quantities, and other practical estimating concepts.

With 3 months access included, candidates can develop a consistent study routine, revisit difficult subjects, practice calculations, and build stronger familiarity with the complete C-17 examination outline.

The goal is to help candidates approach the Hawaii C-17 examination with stronger earthwork knowledge, better safety awareness, improved construction calculations, and a structured preparation process without guaranteeing a passing score or Hawaii contractor license.

How many questions are on the Hawaii C-17 exam?

The current Hawaii Excavating, Grading and Trenching Contractor examination contains 40 questions.

How much time is allowed for the C-17 examination?

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

What score is required to pass the Hawaii C-17 exam?

The minimum passing score is 75%.

Is the Hawaii Excavating, Grading and Trenching exam open book?

No. This examination is CLOSED book.

What does the C-17 contractor classification cover?

The classification covers digging, moving, and placing earthen material for cuts, fills, grades, and trenches, including the use of explosives in connection with that work.

What are the largest subjects on the C-17 exam?

Compaction, Soil Types and Stability, and Estimating are the largest individual categories with 7 questions each.

Does the exam cover excavation equipment?

Yes. Equipment and Technique account for 6 questions.

Does the Hawaii C-17 exam cover retaining walls?

Yes. Retaining Walls account for 4 questions.

Does the exam include shoring?

Yes. Shoring accounts for 3 questions.

Does the exam include OSHA excavation safety?

Yes. OSHA Safety accounts for 4 questions, and 29 CFR Part 1926 is an important study reference.

Does the C-17 exam include blasting?

Yes. Blasting accounts for 2 questions and is also included within the scope of the C-17 classification when connected with excavation work.

Who administers the Hawaii C-17 contractor examination?

The examination is administered by PSI Services LLC for the Hawaii Department of Commerce and Consumer Affairs.

How much qualifying experience does Hawaii look for in C-17 applicants?

Hawaii Contractors License Board application reviews for the C-17 classification use 48 months of qualifying on-site supervisory experience within the scope of excavation, grading, and trenching work.

How long is Hawaii contractor examination eligibility valid?

After Board approval, candidates have a six-month examination eligibility period in which to complete the required examinations.

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

This product includes 3 months access.

Does passing the C-17 examination automatically issue a Hawaii contractor license?

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

Does this product guarantee that I will pass the Hawaii C-17 exam?

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