Free practice questions for the California CSLB C-33 Painting and Decorating trade exam — with a written explanation on every answer, in English, Spanish, and Russian.
The C-33 Painting and Decorating exam is the trade half of a California painting contractor's license; the Law and Business exam is the other half. CSLB's official study guide splits it into four sections — planning and estimating, substrate repair and surface preparation, application of paint and wallcoverings and finishes, and safety. Practice it below: free, no sign-up, with a written explanation on every question.
No account needed. Pick an answer to see whether it's right and read the explanation — the same explanations you get on every question in the full course.
Every question tells you why the correct answer is correct and defines the terms it uses — so you learn the rule, not just the answer.
Questions are written from scratch against the official codes and agency publications for this exam — never copied from the real exam.
Every question and explanation is fully translated, with the English exam term kept alongside — not a shallow machine translation.
LICENA is a practice tool, not a school. We don't promise a pass — we help you understand the material and walk in prepared.
The full C-33 Painting and Decorating course is 500 questions across 5 blocks, drawn from these four official sections.
More than a quarter of the exam, and it is mostly paperwork done with a tape measure. You walk the job, read the plans and the finish schedule, choose the products, and turn all of it into quantities and a price: square feet of wall and ceiling, linear feet of trim and base, gallons at the product's spreading rate, rolls of wallcovering, labor hours. CSLB's study guide says outright that some questions require mathematical computation and that a calculator is provided, so expect arithmetic. Two habits earn their keep. Price surface preparation element by element - siding, sills, sash and eaves rarely need the same work - and never average two production rates when part of a wall needs full removal and the rest only a wash; split the areas, price each at its own rate, and add. Product and color selection sit here too, including a fact worth remembering on a bid walk: light colors reduce solar heating of the wood itself and the moisture gradients that come with it.
The largest section, and the one that decides whether the job lasts. You are expected to name the failure before you pick a tool. A drop or two of household bleach on a discolored area will bleach mildew out in seconds; discoloration that does not bleach is dirt, extractive bleed or iron stain. Peeling, alligatoring, efflorescence on masonry, blue-black iron stain around fasteners on cedar - each has its own cause and its own repair. Then come the removal methods, and the exam follows the National Park Service line: the gentlest effective method, only down to the layer that is failing, hand tools before power tools, no open flame. Priming rules follow the substrate, and substrate readiness is part of the trade: the federal guide specification requires gypsum board to be finished to a skim-coated Level 5 wherever gloss paint or grazing light will read every joint, while Level 4 is enough for flat paint in ordinary lighting.
Brush, roller and spray technique; wallcoverings; stains, clear finishes and waterproofing; touch-up and clean-up. Spray questions run on equipment differences - conventional air, airless, air-assisted, HVLP, electrostatic - plus gun distance, stroke overlap and the errors that produce runs or dry spray. Penetrating stain is brushed, two or three boards at a time with a wet edge, because it is too fluid for a roller and spraying leaves lap marks. Waterproofing has a distinction the exam likes: a water repellent is vapor permeable, while a waterproof coating seals out liquid water and water vapor both, and the National Park Service warns that trapping vapor inside a masonry wall is how a "waterproofing" job causes the damage it was bought to prevent. Read the specification too - the federal painting spec has you tint successive coats progressively darker so the number of coats can be confirmed.
A fifth of the exam, and the questions are specific. Cal/OSHA covers ladders and scaffolds, respirators (medical evaluation, fit test, cartridge change schedule), flammable liquid storage, and the spontaneous ignition of oil-soaked rags. Outdoor crews also fall under the heat illness standard: shade must be present once the work-area temperature exceeds 80 degrees Fahrenheit, drinking water is provided at one quart per employee per hour, and construction is on the list of industries that must run high-heat procedures at 95 degrees. Hazardous materials pull in three separate regimes. EPA's Renovation, Repair and Painting rule governs pre-1978 housing - containment, doors and windows closed within 20 feet on an exterior job, no torching, no unshrouded power sanding, heat guns below 1,100 degrees Fahrenheit. Cal/OSHA's lead and silica standards govern exposure and housekeeping. And asbestos has its own line: 100 square feet of asbestos-containing construction material is the threshold above which a contractor needs CSLB asbestos certification and Cal/OSHA registration.
You take the C-33 exam on a computer at a PSI testing center, closed book, with 3.5 hours per exam. It is multiple choice with four choices per question and one BEST answer; some questions need arithmetic, a calculator is provided, and there is no penalty for guessing. CSLB's official Painting and Decorating (C-33) study guide lists the four sections and their weights, but it does not publish a question count or a passing score, so treat any site quoting one as guessing. You get a printed pass/fail report at the center, a failing report breaks the result out by section, and you may retake after 21 calendar days within your application's 18-month window. C-33 is one of the ten exams with an official Spanish version, which you select when you schedule with PSI. Most first-time applicants also sit the CSLB Law and Business exam.
The full LICENA C-33 course is 500 questions across five blocks covering the four official sections. At 30 questions a day that is about three weeks: one pass to find out what you do not know, a second pass on the sections you missed, then the timed final. Weight your time the way the exam does - planning and surface preparation together are 58 percent of it, so the estimating math and the failure-diagnosis questions deserve most of your attention. Work the math with a calculator and paper the way you will on test day, and read the explanation on every question you get wrong, because the exam rewords facts and memorizing answer letters buys you nothing. If your work touches older buildings, the free asbestos certification practice test covers the neighboring hazard rules. Pair all of it with CSLB's free official study guide, and treat any resource promising a guaranteed pass as a red flag.
The full 500-question C-33 Painting and Decorating bank across 5 blocks, with a written explanation on every answer, weak-area practice and a timed final exam, in EN·ES·RU. $20 a month, on your phone, cancel anytime.
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LICENA provides online practice only. Registration, exam scheduling and licensing are handled by the CSLB and its exam vendor PSI — not by LICENA. LICENA is not affiliated with the CSLB or PSI.