The General Building (B) Exam: Format, Topics, and Passing Score
The current General Building (B) exam is a closed-book, computer-based multiple-choice exam with four choices per question. CSLB gives you 3.5 hours for each examination, and its current B study guide lists five approximate topic sections. CSLB does not publish a fixed B question count or a single public passing percentage in that guide; the percentage needed to pass is provided at the test site. (CSLB B study guide; CSLB exam procedures).
The exam at a glance
Here is the current exam information you can verify before scheduling:
| Exam detail | Current CSLB answer |
|---|---|
| Fixed question count | Not published in the current public B study guide |
| Time | 3.5 hours for each examination |
| Format | Closed-book, computer-assisted multiple choice; four choices per question |
| Calculator | A calculator is provided for questions that require computation |
| Where | PSI testing locations |
| Passing score | The needed percentage is provided at the test site; CSLB does not state one fixed percentage in the public guide |
| After a failed exam | Wait 21 calendar days before paying and rescheduling |
CSLB says trade examinations are multiple choice and that applicants are told at the test site what percentage of correct answers is needed to pass. This is why a responsible B exam article can explain the format and blueprint without inventing a question count or passing score. (CSLB studying for the examination).
The five B exam topic areas
The current B guide is marked for examinations scheduled on or after January 1, 2025. Its percentages are approximate, so use them to allocate study time, not to predict the exact number of questions.
| Topic | Approx. share | What CSLB lists |
|---|---|---|
| Planning and Estimating | 15% | Scope, code compliance, plan reading, field inspection, coordination, and estimating materials, equipment, and labor. |
| Framing and Structural Components | 20% | Subfloor and wall framing, roof framing, seismic hardware, siding and stucco, decks, and stairs. |
| Core Trades | 30% | Plumbing, electrical, HVAC, concrete, earthwork and surveying, insulation, weatherproofing, and roofing. |
| Finish Trades | 20% | Painting, tile and stone, floor covering, cabinetry, drywall, ceilings, windows, doors, and landscaping. |
| Safety | 15% | Personnel safety, transportation and traffic control, and environmental safety. |
How to study the B blueprint
Planning and estimating
Practice reading scope, plans, specifications, inspection notes, and cost information together. Take one project description and write down the work included, the code question it raises, the parties that need coordination, and the cost inputs you would price.
Framing and structural components
Study the sequence, not isolated vocabulary. Link subfloor and wall framing to roof framing, seismic hardware, siding, decks, and stairs. When you miss a question, write the construction decision that makes the correct answer best.
Core trades
This is the largest approximate section. Rotate through plumbing, electrical, HVAC, concrete, earthwork, insulation, weatherproofing, and roofing. Use practice results to find the section that is costing you points.
Finish trades
Build a visual checklist for paint and coatings, tile and stone, flooring, cabinetry, drywall, ceilings, windows, doors, and landscaping. Learn to recognize a finish problem from a short job description and identify the next construction step.
Safety
Treat safety as a scored topic, not a final-day review. Include personnel safety, traffic control, transportation, and environmental hazards in every practice session. A good answer often protects the worker, the public, and the project at the same time.
A worked example
A rectangular slab is 20 feet long and 30 feet wide. What is its area?
- A. 300 square feet
- B. 500 square feet
- C. 600 square feet
- D. 900 square feet
Correct answer: C. 600 square feet. Multiply length by width: 20 × 30 = 600. This is an original practice question in the style of a basic calculation drill; it is not a CSLB exam question.
How to practice without guessing at the score
Use a three-pass loop:
- Read the official CSLB guide and mark each topic you can explain without looking.
- Use Peerless General Building (B) Study Guide Book to study the weak topics and write a one-sentence reason for each rule or calculation.
- Use General Building B Online Practice Exam under timed, closed-book conditions. Review every missed answer and repeat the loop until practice results are consistently 85% or better.
The public guide is a map, not a promise about the exact test form. Your goal is flexible recall across the five sections, careful reading of four choices, and enough calculation practice that a simple problem does not consume the whole session.
FAQ
How many questions are on the B exam?
CSLB’s current B study guide does not publish a fixed question count. Do not build your plan around a number from a prep website. Prepare for the published topic areas, the four-choice format, and the full testing period instead.
What is the passing score for the B exam?
CSLB says applicants are informed at the test site about the percentage of correct answers needed to pass each examination. Because the public guide does not state one fixed percentage, this article does not invent one.
How long is the B exam?
CSLB gives you 3.5 hours to complete each examination. Use the time to read the full stem and all four choices, work the calculation carefully, and return to marked questions before submitting.
Can I use a code book during the B exam?
No. The B study guide describes the exam as closed book. You should study how to recognize the governing concept and calculation rather than plan to look up answers during the test.
How should I use the approximate topic percentages?
Use them to divide study time and diagnose weak areas. They are approximate blueprint shares, not a promise about the exact number of questions on your test. Spend more time where your practice results are weakest.
Sources
- CSLB: B General Building Study Guide
- CSLB: Examination Study Guides
- CSLB: Studying for the Examination
- CSLB: My Original Exam Application Was Accepted
Peerless Institute has helped Californians prepare for CSLB exams since 1953. Use Peerless General Building (B) Study Guide Book to learn the B topics, then use the General Building B Online Practice Exam to practice with instant grading until you are consistently at 85% or better.