CO Class B General Contractor Exam
Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A| Instant Download Pdf
1. What does a Class B General Contractor license in Colorado typically
allow?
A. Construction of all structures including high-rise towers
B. Construction of non-residential and multi-family buildings up to three
stories
C. Construction of detached single-family homes only
D. Work limited to mechanical and plumbing systems
Rationale: Class B licensing generally covers all structures except high-rise
and certain specialized buildings, allowing up to three stories.
2. Which code is primarily used for building safety standards in
Colorado?
A. NEC
B. UPC
C. IBC
D. IFC
Rationale: Most jurisdictions in Colorado adopt a version of the
International Building Code for general construction standards .
3. The allowable building height for a Type V-B construction under IBC
is determined by:
,A. Contractor license type
B. Owner preference
C. Occupancy classification
D. Plumbing code
Rationale: Occupancy classification and construction type determine
allowable height and area.
4. What is the minimum slope for a standard asphalt shingle roof?
A. 1:12
B. 2:12
C. 4:12 D. 6:12
Rationale: Manufacturers require minimum slopes, often 4:12, for proper
shingle performance.
5. Which soil type provides the best foundation support?
A. Peat
B. Highly expansive clay
C. Gravel/sand mixtures
D. Organic topsoil
Rationale: Granular soils like gravel and sand offer strong load-bearing
capacity and low compressibility.
6. What document outlines the scope of work and materials?
A. Bid bond
B. Punch list
C. Specifications
D. Certificate of occupancy
Rationale: Specifications describe materials, standards, and workmanship
requirements.
7. A building permit is typically required when:
, A. Painting interior walls
B. Installing appliances
C. Structural work is performed
D. Changing décor
Rationale: Structural, life-safety, and major system modifications require
permits.
8. The primary purpose of reinforcing steel in concrete is to:
A. Add weight
B. Only resist compressive forces
C. Resist tensile forces
D. Reduce curing time
Rationale: Concrete is strong in compression but weak in tension,
requiring reinforcement.
9. Which of the following MUST be on the construction site?
A. Owner's business license
B. Approved plans
C. Bank statements
D. Appraisal documents
Rationale: Inspectors require approved plans to verify compliance with
permits.
10. What is the standard compressive strength of residential concrete
slabs?
A. 1500 psi
B. 2000 psi
C. 3000 psi
D. 5000 psi
Rationale: Typical code minimum for residential slabs is around 3000 psi.
Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A| Instant Download Pdf
1. What does a Class B General Contractor license in Colorado typically
allow?
A. Construction of all structures including high-rise towers
B. Construction of non-residential and multi-family buildings up to three
stories
C. Construction of detached single-family homes only
D. Work limited to mechanical and plumbing systems
Rationale: Class B licensing generally covers all structures except high-rise
and certain specialized buildings, allowing up to three stories.
2. Which code is primarily used for building safety standards in
Colorado?
A. NEC
B. UPC
C. IBC
D. IFC
Rationale: Most jurisdictions in Colorado adopt a version of the
International Building Code for general construction standards .
3. The allowable building height for a Type V-B construction under IBC
is determined by:
,A. Contractor license type
B. Owner preference
C. Occupancy classification
D. Plumbing code
Rationale: Occupancy classification and construction type determine
allowable height and area.
4. What is the minimum slope for a standard asphalt shingle roof?
A. 1:12
B. 2:12
C. 4:12 D. 6:12
Rationale: Manufacturers require minimum slopes, often 4:12, for proper
shingle performance.
5. Which soil type provides the best foundation support?
A. Peat
B. Highly expansive clay
C. Gravel/sand mixtures
D. Organic topsoil
Rationale: Granular soils like gravel and sand offer strong load-bearing
capacity and low compressibility.
6. What document outlines the scope of work and materials?
A. Bid bond
B. Punch list
C. Specifications
D. Certificate of occupancy
Rationale: Specifications describe materials, standards, and workmanship
requirements.
7. A building permit is typically required when:
, A. Painting interior walls
B. Installing appliances
C. Structural work is performed
D. Changing décor
Rationale: Structural, life-safety, and major system modifications require
permits.
8. The primary purpose of reinforcing steel in concrete is to:
A. Add weight
B. Only resist compressive forces
C. Resist tensile forces
D. Reduce curing time
Rationale: Concrete is strong in compression but weak in tension,
requiring reinforcement.
9. Which of the following MUST be on the construction site?
A. Owner's business license
B. Approved plans
C. Bank statements
D. Appraisal documents
Rationale: Inspectors require approved plans to verify compliance with
permits.
10. What is the standard compressive strength of residential concrete
slabs?
A. 1500 psi
B. 2000 psi
C. 3000 psi
D. 5000 psi
Rationale: Typical code minimum for residential slabs is around 3000 psi.
