Free practice questions for Arizona's C-11 / CR-11 Electrical (Commercial) trade exam — 110 questions on the 2017 NEC, fire alarm and jobsite safety — with a written explanation on every answer, in English, Spanish, and Russian.
8 questions, about 4 minutes. 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.
Practice across the full question bank.
Each explanation shows why the correct answer works.
Spend more time on the questions you miss.
Practice under exam-style time pressure before exam day.
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 Arizona C-11 / CR-11 course is 500 questions across 5 blocks written to the exam's own references — the 2017 NEC, NFPA 72 and 29 CFR 1926 — every answer cited to its section.
Exam structure, topics, study areas and official resources.
The C-11 / CR-11 Electrical (Commercial) exam is PSI's trade test for Arizona's commercial electrical licenses: 110 questions, 240 minutes, 70 percent to pass, open book. The references allowed in the exam center are the 2017 National Electrical Code, NFPA 72 and OSHA's 29 CFR 1926. Try the free sample above: no sign-up, with a written explanation on every question.
PSI's C-11 (CR-11) Electrical (Commercial) content outline (rev. 6/8/23), linked from the Arizona bulletin, sets the format: 110 questions, 240 minutes, 70 percent, open book. Three references are allowed in the exam center: the 2017 National Electrical Code (NFPA 70), NFPA 72 (2016) for fire-alarm questions and 29 CFR 1926 for jobsite safety. Code questions are based only on the listed edition, so study the 2017 NEC even though newer editions exist. Books may be highlighted and tabbed with permanent tabs beforehand, but not written in during the exam; a silent, non-programmable calculator is allowed.
The outline splits the exam into 15 areas. The heaviest are service, feeders and branch circuits (13), grounding and bonding (13) and special occupancies and equipment (13), followed by conductors and cables (12), raceways and boxes (10), photovoltaics (10) and overcurrent protection (8). General electrical knowledge, motors, low voltage, fire detection and alarm systems and safety carry five questions each; lighting has three, devices two and illuminated signs one. Commercial work shows up in the arithmetic: continuous loads at 125 percent, motor conductors from the full-load current tables rather than the nameplate, working-space depth by voltage and condition, PV currents with their 125 percent factors.
C-11 is Arizona's commercial electrical classification and CR-11 the dual residential-and-commercial license; both take this same PSI exam. The outline describes the scope as wiring and electrical equipment for generating, transmitting or using electrical energy of less than 600 volts, inside and on buildings and in outside, overhead and underground work. Residential-only electrical work is the separate R-11 license with its own exam. Every Arizona license also requires the SRE, AZ ROC's separate open-book law exam; the trade exam tests none of that statute material, so budget for both preparations.
The full LICENA course is 500 questions in five blocks, every answer explained with its NEC or OSHA citation. At 30 questions a day that is under three weeks: a first pass to find what you do not know, a second on weak blocks, then the timed final mirroring the real 110-question, 240-minute format. Open book rewards navigation — knowing that working space is 110.26, branch-circuit overcurrent is 210.20, motor conductors are 430.22, grounding electrode conductors are 250.66 and PV circuit sizing is 690.8 — and drilling builds that reflex. Pair the bank with the Arizona SRE practice (also required) and our guide to Arizona's contractor exams.
Try the full bank free for 3 days — no card needed. Then $9.99 for your first month and $19.99/month after that if you decide to continue, cancel anytime. A school sells a full prepaid package; this is a question bank you can stop at any time — and you study on your phone, in your language, whenever you have a few minutes.
Continue Arizona C-11 practice The free sample above stays free. Creating an account is free — no card needed.LICENA gives you practice questions to study with. We are not an accredited school and we do not guarantee that you will pass any exam.
LICENA provides online practice only. Registration, testing and licensing are handled by the Arizona Registrar of Contractors (AZ ROC) and PSI — not by LICENA. LICENA is not affiliated with AZ ROC or PSI.