CSLB B-LICENSE (GENERAL CONTRACTOR) – PRACTICE QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) PLUS RATIONALES 2026 Q&A | INSTANT DOWNLOAD
PDF.
*Core Domains*
*• Planning and Estimation*
*• Framing and Structural Components*
*• Core Trades (Plumbing, HVAC, Electrical)*
*• Finish Trades and Carpentry*
*• Safety Regulations and Cal/OSHA*
*• Project Management and Law*
*• Business Operations*
*Introduction*
*The purpose of this assessment is to evaluate the competency of individuals seeking
*California General Building Contractor designation. This exam assesses a broad rang
*skills, including structural framing, trade coordination, and regulatory compliance
*The assessment utilizes a combination of knowledge-based multiple-choice questions*
*and complex scenario-based problems to simulate real-world challenges found on*
*construction sites. Emphasis is placed on the practical application of building cod
*safety protocols, and sound decision-making. Candidates must demonstrate the abilit
*to manage diverse project components while maintaining legal and ethical standards*
*essential for the contracting profession.*
Section One: Questions 1–100
1. According to the California Building Code, what is the minimum required thickness for a
residential concrete slab-on-grade?
A. 2 inches
B. 3.5 inches
C. 5 inches
D. 6 inches
,🟢 B. 3.5 inches
🔴 RATIONALE: The standard code requirement for a conventional residential concrete slab-on-
grade is a minimum of 3.5 inches to ensure structural integrity and load distribution.
2. A contractor is installing a kitchen island with a sink. What is the maximum distance a 1.5-
inch vent can be placed from the trap?
A. 3 feet 6 inches
B. 5 feet
C. 6 feet
D. 8 feet
🟢 C. 6 feet
🔴 RATIONALE: Plumbing codes specify that for a 1.5-inch pipe, the maximum horizontal
distance between the trap and the vent is 6 feet to prevent siphoning.
3. Which of the following is a requirement for a contract to be legally binding for a home
improvement project over $500?
A. A verbal agreement in front of a witness
B. A written contract signed by both the contractor and the owner
C. A down payment of at least 25%
D. A notarized signature from the local building department
🟢 B. A written contract signed by both the contractor and the owner
🔴 RATIONALE: California law requires any home improvement project exceeding $500 to be
governed by a written contract signed by all parties involved to be enforceable.
4. When installing floor joists, what is the maximum allowed notch depth at the end of the
joist?
A. 1/6 of the joist depth
B. 1/4 of the joist depth
,C. 1/3 of the joist depth
D. 1/2 of the joist depth
🟢 B. 1/4 of the joist depth
🔴 RATIONALE: To maintain structural stability, notches at the ends of joists cannot exceed
one-fourth of the depth of the member.
5. A "B" General Building Contractor is permitted to take a prime contract for a project
involving only one trade if:
A. The trade is framing or carpentry
B. The project value is less than $10,000
C. The contractor holds a specialty license in that trade
D. The owner provides all materials
🟢 A. The trade is framing or carpentry
🔴 RATIONALE: CSLB regulations allow a B-licensed contractor to perform single-trade projects
if they involve framing or carpentry; otherwise, two or more unrelated trades are required.
6. What is the minimum width of a residential hallway according to the California Building
Code?
A. 30 inches
B. 32 inches
C. 36 inches
D. 42 inches
🟢 C. 36 inches
🔴 RATIONALE: Hallways must be at least 36 inches wide to ensure adequate egress and
accessibility within a residential structure.
7. Which safety document must be present at every job site according to Cal/OSHA
requirements?
, A. The company's articles of incorporation
B. The contractor's original license pocket card
C. An Injury and Illness Prevention Program (IIPP)
D. A copy of the owner's insurance policy
🟢 C. An Injury and Illness Prevention Program (IIPP)
🔴 RATIONALE: Every employer in California is required to have a written, effective Injury and
Illness Prevention Program (IIPP) available at the job site.
8. When excavating a trench that is 5 feet deep or more, what safety measure is mandatory?
A. Yellow caution tape around the perimeter
B. A designated spotter at the top of the trench
C. A shoring, shielding, or sloping system
D. A gas monitor worn by all workers
🟢 C. A shoring, shielding, or sloping system
🔴 RATIONALE: Cal/OSHA requires that trenches 5 feet or deeper must be protected by
shoring, sloping, or a trench shield to prevent cave-ins.
9. How many days does a contractor have to notify the CSLB Registrar after the
disassociation of a Responsible Managing Officer (RMO)?
A. 10 days
B. 30 days
C. 60 days
D. 90 days
🟢 D. 90 days
🔴 RATIONALE: If an RMO or RME leaves a license, the licensee must notify the Registrar and
replace the qualifier within 90 days to avoid license suspension.
10. What is the purpose of a "Notice of Cessation"?
ANSWERS (VERIFIED ANSWERS) PLUS RATIONALES 2026 Q&A | INSTANT DOWNLOAD
PDF.
*Core Domains*
*• Planning and Estimation*
*• Framing and Structural Components*
*• Core Trades (Plumbing, HVAC, Electrical)*
*• Finish Trades and Carpentry*
*• Safety Regulations and Cal/OSHA*
*• Project Management and Law*
*• Business Operations*
*Introduction*
*The purpose of this assessment is to evaluate the competency of individuals seeking
*California General Building Contractor designation. This exam assesses a broad rang
*skills, including structural framing, trade coordination, and regulatory compliance
*The assessment utilizes a combination of knowledge-based multiple-choice questions*
*and complex scenario-based problems to simulate real-world challenges found on*
*construction sites. Emphasis is placed on the practical application of building cod
*safety protocols, and sound decision-making. Candidates must demonstrate the abilit
*to manage diverse project components while maintaining legal and ethical standards*
*essential for the contracting profession.*
Section One: Questions 1–100
1. According to the California Building Code, what is the minimum required thickness for a
residential concrete slab-on-grade?
A. 2 inches
B. 3.5 inches
C. 5 inches
D. 6 inches
,🟢 B. 3.5 inches
🔴 RATIONALE: The standard code requirement for a conventional residential concrete slab-on-
grade is a minimum of 3.5 inches to ensure structural integrity and load distribution.
2. A contractor is installing a kitchen island with a sink. What is the maximum distance a 1.5-
inch vent can be placed from the trap?
A. 3 feet 6 inches
B. 5 feet
C. 6 feet
D. 8 feet
🟢 C. 6 feet
🔴 RATIONALE: Plumbing codes specify that for a 1.5-inch pipe, the maximum horizontal
distance between the trap and the vent is 6 feet to prevent siphoning.
3. Which of the following is a requirement for a contract to be legally binding for a home
improvement project over $500?
A. A verbal agreement in front of a witness
B. A written contract signed by both the contractor and the owner
C. A down payment of at least 25%
D. A notarized signature from the local building department
🟢 B. A written contract signed by both the contractor and the owner
🔴 RATIONALE: California law requires any home improvement project exceeding $500 to be
governed by a written contract signed by all parties involved to be enforceable.
4. When installing floor joists, what is the maximum allowed notch depth at the end of the
joist?
A. 1/6 of the joist depth
B. 1/4 of the joist depth
,C. 1/3 of the joist depth
D. 1/2 of the joist depth
🟢 B. 1/4 of the joist depth
🔴 RATIONALE: To maintain structural stability, notches at the ends of joists cannot exceed
one-fourth of the depth of the member.
5. A "B" General Building Contractor is permitted to take a prime contract for a project
involving only one trade if:
A. The trade is framing or carpentry
B. The project value is less than $10,000
C. The contractor holds a specialty license in that trade
D. The owner provides all materials
🟢 A. The trade is framing or carpentry
🔴 RATIONALE: CSLB regulations allow a B-licensed contractor to perform single-trade projects
if they involve framing or carpentry; otherwise, two or more unrelated trades are required.
6. What is the minimum width of a residential hallway according to the California Building
Code?
A. 30 inches
B. 32 inches
C. 36 inches
D. 42 inches
🟢 C. 36 inches
🔴 RATIONALE: Hallways must be at least 36 inches wide to ensure adequate egress and
accessibility within a residential structure.
7. Which safety document must be present at every job site according to Cal/OSHA
requirements?
, A. The company's articles of incorporation
B. The contractor's original license pocket card
C. An Injury and Illness Prevention Program (IIPP)
D. A copy of the owner's insurance policy
🟢 C. An Injury and Illness Prevention Program (IIPP)
🔴 RATIONALE: Every employer in California is required to have a written, effective Injury and
Illness Prevention Program (IIPP) available at the job site.
8. When excavating a trench that is 5 feet deep or more, what safety measure is mandatory?
A. Yellow caution tape around the perimeter
B. A designated spotter at the top of the trench
C. A shoring, shielding, or sloping system
D. A gas monitor worn by all workers
🟢 C. A shoring, shielding, or sloping system
🔴 RATIONALE: Cal/OSHA requires that trenches 5 feet or deeper must be protected by
shoring, sloping, or a trench shield to prevent cave-ins.
9. How many days does a contractor have to notify the CSLB Registrar after the
disassociation of a Responsible Managing Officer (RMO)?
A. 10 days
B. 30 days
C. 60 days
D. 90 days
🟢 D. 90 days
🔴 RATIONALE: If an RMO or RME leaves a license, the licensee must notify the Registrar and
replace the qualifier within 90 days to avoid license suspension.
10. What is the purpose of a "Notice of Cessation"?
