CA Branch 3 Practice Test CSLB General
Building Contractor Class B Exam Actual
Exam 2026/2027 with Detailed Rationales |
Complete Exam-Style Questions | Pass
Guaranteed – A+ Graded
Section 1: CSLB Regulations, Licensing, & Business
Practices (Questions 1–10)
Q1: A homeowner in Sacramento hires you for a $12,000 kitchen remodel. Under California's
Business and Professions Code, what is the maximum legal down payment you can request before
work begins?
A. 20% of the contract price, or $2,400, whichever is less
B. 10% of the contract price, or $1,000, whichever is more
C. 10% of the contract price, or $1,000, whichever is less [CORRECT]
D. 50% of the contract price to cover material deposits
,Correct Answer: C
Rationale: The best answer is C. Under California law (Business and Professions Code Section
7159.5), the down payment for a home improvement contract cannot exceed 10% of the contract
price or $1,000, whichever is less—so for a $12,000 job, the max down payment is $1,000. Many
contractors get tripped up thinking they need bigger upfront deposits for materials, but the law is
strict on this to protect consumers.
Q2: You hold a Class B General Building Contractor license and want to bid on a project that
involves both structural framing and plumbing rough-in. Which statement about your licensing
scope is correct?
A. You can only perform the framing work and must subcontract all plumbing to a C-36 contractor
B. You can perform both the framing and plumbing as long as the plumbing is incidental and
supplemental to the building project [CORRECT]
C. You must obtain a C-36 classification before performing any plumbing work
D. A Class B license only covers concrete and masonry work, not plumbing or framing
Correct Answer: B
Rationale: The best answer is B. A Class B General Building Contractor can perform any
construction trade as long as it is incidental and supplemental to the primary building
project—meaning the plumbing work is part of the overall structure you're building. You don't need
a C-36 for basic plumbing rough-in on your own building project, though many contractors still
prefer to subcontract specialized trades for liability and quality reasons.
Q3: Your license has been on inactive status for 18 months. You want to reactivate it to bid on a
new commercial project. What must you do?
,A. Retake both the law and business exam and the trade exam
B. Pay the renewal fee and any delinquent penalties, and provide proof of current workers'
compensation insurance if you have employees [CORRECT]
C. Start over with a new application and four years of new experience documentation
D. Wait until the next biennial renewal cycle and apply then
Correct Answer: B
Rationale: The best answer is B. Reactivating an inactive license is straightforward—you pay the
renewal fee plus any penalties, maintain your $15,000 contractor bond, and provide current
workers' compensation insurance if you have employees. The CSLB doesn't make you retake
exams or re-prove experience just for inactive status, though if your license expired completely,
you'd be looking at a different situation.
Q4: A subcontractor who supplied $8,000 worth of hardwood flooring hasn't been paid by the
general contractor. To preserve mechanics lien rights, what is the subcontractor's deadline for
serving a preliminary notice?
A. Within 10 days of completing the work
B. Within 20 days of first furnishing labor or materials to the project [CORRECT]
C. Within 30 days of the project's final completion
D. Preliminary notices are only required for public works projects
Correct Answer: B
, Rationale: The best answer is B. In California, a subcontractor or supplier must serve a preliminary
notice within 20 days of first furnishing labor or materials to preserve full mechanics lien rights. If
they miss that window, they can still serve a late notice, but it only covers work performed in the 20
days preceding the notice and going forward. I've seen too many good subcontractors lose their
lien rights because they treated preliminary notices as an afterthought.
Q5: A contractor diverts $25,000 of project funds intended for payroll and materials to pay off
personal gambling debts. What CSLB disciplinary action is most likely?
A. A written warning and mandatory ethics course
B. Suspension or revocation of license, plus potential criminal charges for diversion of funds
[CORRECT]
C. A $500 administrative fine with no license penalty
D. Mandatory restitution but no license action
Correct Answer: B
Rationale: The best answer is B. Diversion of funds—using project money for purposes other than
the specific project—is one of the most serious violations in the CSLB's book. It can trigger license
suspension or revocation, criminal prosecution, and civil liability. The CSLB views this as a breach
of trust that goes to the heart of contractor integrity, not just a paperwork mistake.
Q6: You're hiring a home improvement salesperson to canvass neighborhoods and solicit roofing
contracts door-to-door. What CSLB requirement applies?
A. The salesperson must register with the CSLB and display a valid registration ID when soliciting
[CORRECT]
B. Door-to-door solicitation is prohibited for roofing contractors in California
Building Contractor Class B Exam Actual
Exam 2026/2027 with Detailed Rationales |
Complete Exam-Style Questions | Pass
Guaranteed – A+ Graded
Section 1: CSLB Regulations, Licensing, & Business
Practices (Questions 1–10)
Q1: A homeowner in Sacramento hires you for a $12,000 kitchen remodel. Under California's
Business and Professions Code, what is the maximum legal down payment you can request before
work begins?
A. 20% of the contract price, or $2,400, whichever is less
B. 10% of the contract price, or $1,000, whichever is more
C. 10% of the contract price, or $1,000, whichever is less [CORRECT]
D. 50% of the contract price to cover material deposits
,Correct Answer: C
Rationale: The best answer is C. Under California law (Business and Professions Code Section
7159.5), the down payment for a home improvement contract cannot exceed 10% of the contract
price or $1,000, whichever is less—so for a $12,000 job, the max down payment is $1,000. Many
contractors get tripped up thinking they need bigger upfront deposits for materials, but the law is
strict on this to protect consumers.
Q2: You hold a Class B General Building Contractor license and want to bid on a project that
involves both structural framing and plumbing rough-in. Which statement about your licensing
scope is correct?
A. You can only perform the framing work and must subcontract all plumbing to a C-36 contractor
B. You can perform both the framing and plumbing as long as the plumbing is incidental and
supplemental to the building project [CORRECT]
C. You must obtain a C-36 classification before performing any plumbing work
D. A Class B license only covers concrete and masonry work, not plumbing or framing
Correct Answer: B
Rationale: The best answer is B. A Class B General Building Contractor can perform any
construction trade as long as it is incidental and supplemental to the primary building
project—meaning the plumbing work is part of the overall structure you're building. You don't need
a C-36 for basic plumbing rough-in on your own building project, though many contractors still
prefer to subcontract specialized trades for liability and quality reasons.
Q3: Your license has been on inactive status for 18 months. You want to reactivate it to bid on a
new commercial project. What must you do?
,A. Retake both the law and business exam and the trade exam
B. Pay the renewal fee and any delinquent penalties, and provide proof of current workers'
compensation insurance if you have employees [CORRECT]
C. Start over with a new application and four years of new experience documentation
D. Wait until the next biennial renewal cycle and apply then
Correct Answer: B
Rationale: The best answer is B. Reactivating an inactive license is straightforward—you pay the
renewal fee plus any penalties, maintain your $15,000 contractor bond, and provide current
workers' compensation insurance if you have employees. The CSLB doesn't make you retake
exams or re-prove experience just for inactive status, though if your license expired completely,
you'd be looking at a different situation.
Q4: A subcontractor who supplied $8,000 worth of hardwood flooring hasn't been paid by the
general contractor. To preserve mechanics lien rights, what is the subcontractor's deadline for
serving a preliminary notice?
A. Within 10 days of completing the work
B. Within 20 days of first furnishing labor or materials to the project [CORRECT]
C. Within 30 days of the project's final completion
D. Preliminary notices are only required for public works projects
Correct Answer: B
, Rationale: The best answer is B. In California, a subcontractor or supplier must serve a preliminary
notice within 20 days of first furnishing labor or materials to preserve full mechanics lien rights. If
they miss that window, they can still serve a late notice, but it only covers work performed in the 20
days preceding the notice and going forward. I've seen too many good subcontractors lose their
lien rights because they treated preliminary notices as an afterthought.
Q5: A contractor diverts $25,000 of project funds intended for payroll and materials to pay off
personal gambling debts. What CSLB disciplinary action is most likely?
A. A written warning and mandatory ethics course
B. Suspension or revocation of license, plus potential criminal charges for diversion of funds
[CORRECT]
C. A $500 administrative fine with no license penalty
D. Mandatory restitution but no license action
Correct Answer: B
Rationale: The best answer is B. Diversion of funds—using project money for purposes other than
the specific project—is one of the most serious violations in the CSLB's book. It can trigger license
suspension or revocation, criminal prosecution, and civil liability. The CSLB views this as a breach
of trust that goes to the heart of contractor integrity, not just a paperwork mistake.
Q6: You're hiring a home improvement salesperson to canvass neighborhoods and solicit roofing
contracts door-to-door. What CSLB requirement applies?
A. The salesperson must register with the CSLB and display a valid registration ID when soliciting
[CORRECT]
B. Door-to-door solicitation is prohibited for roofing contractors in California
