Colorado General Contractor Class B Exam

Colorado General Contractor Class B Exam (Limited to Buildings ≤ 3 Stories) Practice Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

Question 1 Which of the following is the maximum height allowed for a Class B commercial building in Colorado?

• 1 story
• 2 stories
• 3 stories
• 4 stories
• 3 stories

Rationale: Class B contractors are limited to buildings that are 3 stories or

less in height according to Colorado state licensing rules. 1 / 4

Question 2 When constructing a wood-framed building, which type of lumber is typically used for structural framing?

• Redwood
• Douglas Fir
• Cedar
• Plywood
• Douglas Fir

Rationale: Douglas Fir is commonly used in structural framing due to its

strength, availability, and reliability.Question 3

The primary purpose of a building’s foundation is to:

• Provide aesthetic appeal
• Distribute the building load to the ground
• Prevent moisture intrusion only
• Support roofing materials
• Distribute the building load to the ground

Rationale: Foundations are designed to safely transfer loads from the

building to the soil below, preventing settlement or structural failure.Question 4 Which type of soil requires the most careful foundation design?

• Sand
• Clay 2 / 4

• Gravel
• Rock
• Clay

Rationale: Clay expands and contracts with moisture changes, which can

cause foundation movement if not properly designed.Question 5 Which document establishes the legal relationship between the owner and the contractor?

• Blueprint
• Permit
• Contract
• Invoice
• Contract

Rationale: The contract defines responsibilities, scope, cost, and timeline,

making it the legal basis for the project.Question 6 During construction, which material is primarily used for exterior insulation and finishing systems (EIFS)?

• Concrete
• Stucco over rigid foam
• Asphalt shingles
• Metal siding
• Stucco over rigid foam 3 / 4

Rationale: EIFS consists of insulation boards covered with a reinforced base

coat and a finishing coat, commonly stucco-like in appearance.Question 7 Which type of roofing is most commonly used for low-slope commercial buildings in Colorado?

• Asphalt shingles
• Built-up roofing (BUR)
• Metal standing seam
• Wood shakes
• Built-up roofing (BUR)

Rationale: BUR provides durability and waterproofing for low-slope roofs

common in commercial structures.Question 8 When installing electrical wiring in a building, which standard must be followed?

A. OSHA 1926

• National Electrical Code (NEC)
• ASTM International Standards
• International Plumbing Code
• National Electrical Code (NEC)

Rationale: The NEC establishes minimum safety standards for electrical

wiring in residential and commercial buildings.

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