200+ Free NASCLA Contractor Practice Questions

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A contractor is preparing a bid for a commercial office building. According to standard construction estimating practices, which cost component typically represents the largest percentage of the total project cost?

General conditions and overhead

Labor costs

Material costs

Subcontractor costs

to track

2026 Statistics

Key Facts: NASCLA Contractor Exam

115

Exam Questions

PSI

70%

Passing Score

81 of 115 questions

5.5 hrs

Exam Duration

PSI

$120

Exam Fee

PSI

13+

States Accepted

NASCLA

~50-60%

First-Time Pass Rate

Industry estimate

The NASCLA exam has 115 questions in 5.5 hours with a 70% passing score (81 correct). Major domains: Procurement & Contracting (27%), General Requirements (22%), Site Construction (13%), plus trade sections covering concrete, masonry, metals, wood, finishes, MEP, and electrical. Open-book exam accepted in 13+ states. PSI-administered with $120 fee.

Sample NASCLA Contractor Practice Questions

Try these sample questions to test your NASCLA Contractor exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 200+ question experience with AI tutoring.

1A contractor is preparing a bid for a commercial office building. According to standard construction estimating practices, which cost component typically represents the largest percentage of the total project cost?

A.General conditions and overhead

B.Labor costs

C.Material costs

D.Subcontractor costs

Explanation: In most commercial construction projects, subcontractor costs represent the largest percentage of total project cost, often 60-80% of the contract amount. This is because specialty work (electrical, mechanical, plumbing, concrete, steel) is typically subcontracted. While labor and materials are significant, the aggregated costs of all subcontractors typically exceed any single direct cost category.

2Under OSHA 29 CFR 1926, what is the minimum distance that a ladder must extend above the upper landing surface when used for access?

A.1 foot

B.2 feet

C.3 feet

D.4 feet

Explanation: OSHA requires that non-self-supporting ladders extend at least 3 feet above the upper landing surface to provide a secure handhold for workers transitioning between the ladder and the landing. This requirement ensures workers have adequate support when stepping on or off the ladder at elevated surfaces.

3A project schedule shows that Activity B cannot start until Activity A is completed. What type of relationship exists between these activities?

A.Start-to-start

B.Finish-to-start

C.Finish-to-finish

D.Start-to-finish

Explanation: A finish-to-start (FS) relationship is the most common dependency in construction scheduling, where the successor activity (B) cannot begin until the predecessor activity (A) is completed. This sequential relationship ensures proper work flow and prevents conflicts between trades or activities.

4According to the International Building Code (IBC), what is the primary factor that determines the required fire resistance rating of building elements?

A.Building height only

B.Type of construction and occupancy classification

C.Location within the jurisdiction

D.Architectural design style

Explanation: The IBC establishes fire resistance requirements based on two primary factors: the type of construction (Type I through V, with further subdivisions) and the occupancy classification (Group A through U). These factors determine the required fire resistance ratings for structural elements, walls, and floor/ceiling assemblies to ensure life safety and property protection.

5A contractor receives a notice of award for a public works project. According to standard contract documents (AIA A201 or similar), when does the contract time typically begin?

A.Upon receipt of the notice of award

B.On the date established in the notice to proceed

C.When the first materials are delivered to the site

D.Upon signing of the final contract documents

Explanation: The contract time generally begins on the date established in the notice to proceed issued by the owner or architect. This formal document authorizes the contractor to begin work and establishes the project schedule baseline. The notice of award precedes this but does not typically trigger the contract time clock.

6Under OSHA excavation safety standards (29 CFR 1926 Subpart P), at what depth is a protective system required for trenches?

A.4 feet

B.5 feet

C.6 feet

D.8 feet

Explanation: OSHA requires protective systems (sloping, benching, shoring, or shielding) for all excavations 5 feet or deeper. At depths less than 5 feet, a protective system may still be required if the competent person determines there is a potential for cave-in based on soil conditions, water content, or other factors.

7A project experiences an unforeseen subsurface condition that requires additional work and extends the schedule. Under a typical AIA A201 General Conditions contract, what type of claim has the contractor most likely encountered?

A.A claim for acceleration

B.A claim for a differing site condition (Type I or Type II)

C.A claim for loss of productivity

D.A claim for termination for convenience

Explanation: Unforeseen subsurface conditions typically constitute a differing site condition claim. Type I DSC involves conditions that differ materially from those indicated in the contract documents. Type II involves unusual conditions of an unusual nature that differ materially from those ordinarily encountered. Both may entitle the contractor to additional time and/or compensation.

8In construction cost estimating, what does the term "overhead" typically include?

A.Only direct project costs such as labor and materials

B.Office expenses, insurance, and administrative salaries not attributable to a specific project

C.Only equipment rental costs

D.Profit margin and contingency only

Explanation: Overhead in construction estimating refers to indirect costs necessary to run the business but not directly attributable to a specific project. This includes office rent, administrative salaries, general liability insurance, utilities, and other operational expenses. These costs must be distributed across all projects and recovered through markup.

9According to OSHA 29 CFR 1926.451, at what height must employees on scaffolds be protected by guardrails or personal fall arrest systems?

A.4 feet

B.6 feet

C.10 feet

D.12 feet

Explanation: OSHA requires fall protection on scaffolds at heights of 10 feet or more above a lower level. This can be provided by guardrail systems, personal fall arrest systems, or a combination. The 10-foot threshold is specific to scaffolds and differs from general construction (6 feet) and general industry (4 feet) requirements.

10A contractor is preparing a preliminary estimate based on historical data from similar projects. Which estimating method is being used?

A.Unit price estimating

B.Assembly or systems estimating

C.Parametric or conceptual estimating

D.Detailed quantity takeoff

Explanation: Parametric or conceptual estimating uses historical data and statistical relationships between project parameters (such as square footage, number of rooms, or building type) and costs. This method is useful in early project phases when detailed design information is not yet available, providing a rough order of magnitude estimate.

About the NASCLA Contractor Exam

The NASCLA (National Association of State Contractors Licensing Agencies) accredited examination for commercial general building contractors is an open-book exam accepted in 13+ states. It covers general requirements, procurement and contracting, site construction, and trade disciplines.

Questions

115 scored questions

Time Limit

5.5 hours

Passing Score

70% (81 of 115 questions)

Exam Fee

$120 (NASCLA / PSI)

NASCLA Contractor Exam Content Outline

22%

General Requirements

Planning, estimating, project management, safety/OSHA, and code compliance

27%

Procurement and Contracting

Bidding, contracts, change orders, submittals, and closeout procedures

13%

Site Construction

Excavation, grading, soil, erosion control, and sitework

Concrete

Mix design, placement, curing, and reinforced concrete

Masonry

Brick, block, stone, mortar, and wall construction

Metals

Structural steel, light gauge framing, and connections

Wood

Framing, engineered lumber, and structural wood

Thermal and Moisture Protection

Roofing, waterproofing, and insulation

Doors, Windows, and Glazing

Installation, types, and hardware

Finishes

Drywall, flooring, painting, and ceilings

Mechanical and Plumbing

HVAC, plumbing systems, and coordination

Electrical

Basic electrical systems and code requirements

How to Pass the NASCLA Contractor Exam

What You Need to Know

Passing score: 70% (81 of 115 questions)
Exam length: 115 questions
Time limit: 5.5 hours
Exam fee: $120

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

NASCLA Contractor Study Tips from Top Performers

1Focus on Procurement & Contracting (27%) — the largest domain covering bidding, contracts, and change orders

2Master General Requirements (22%) — project management, estimating, safety/OSHA, and code compliance

3Organize reference materials with tabs and bookmarks for quick lookup during the open-book exam

4Study construction math: estimating quantities, calculating areas/volumes, and understanding specifications

5Review OSHA safety regulations and general duty clause requirements

6Practice with timed full-length exams to build endurance for the 5.5-hour test

Frequently Asked Questions

What is the NASCLA contractor exam?

The NASCLA accredited exam is a standardized general contractor licensing exam accepted in 13+ states including Alabama, Arizona, Arkansas, Georgia, Louisiana, Mississippi, Nevada, North Carolina, Oregon, South Carolina, Tennessee, Virginia, and West Virginia.

How many questions are on the NASCLA exam?

The NASCLA exam has 115 questions with a 5.5-hour time limit. You need 70% (81 correct answers) to pass. The exam is open-book, allowing approved reference materials.

What are the prerequisites for the NASCLA exam?

Prerequisites vary by state but generally require 2-4 years of construction experience. The exam itself requires a $120 fee and registration through PSI. After passing, you apply for licensure through your state.

Is the NASCLA exam open-book?

Yes, the NASCLA exam is open-book. You may bring approved reference materials. Focus on knowing where to find information quickly since the exam has 115 questions in 5.5 hours.

How should I prepare for the NASCLA exam?

Plan for 80-120 hours of study over 6-10 weeks. Focus on Procurement & Contracting (27%) and General Requirements (22%) — together they make up nearly half the exam. Practice with timed exams to build stamina for the 5.5-hour test.