CSLB C-10 Electrical Full Mock Exam
Reviewed by Ken Pergeson, Permit Expediter & Code Compliance Consultant, Ventura County, CA ·
Sit a complete timed exam under test-centre conditions. You see no answers until you submit, then you get a score report by section and a full review with explanations.
Exam Format · Practice Format
Before You Begin
CSLB does not publish the C-10 question count or time limit in its study guide, and tells you the passing percentage at the test site. This mock uses 100 questions in 3 hours and a 70% target only as an unofficial practice format. Source: CSLB C-10 Electrical Study Guide.
- The timer starts when you begin and the exam submits itself when time runs out.
- Move freely with Previous, Next or the numbered navigator, and flag any question to come back to.
- No feedback is shown until you submit. Unanswered questions count as wrong.
- Nothing is sent anywhere; the exam runs entirely in your browser.
Exam Format · Practice Format
Before You Begin
CSLB does not publish the C-10 question count or time limit in its study guide, and tells you the passing percentage at the test site. This mock uses 100 questions in 3 hours and a 70% target only as an unofficial practice format. Source: CSLB C-10 Electrical Study Guide.
- The timer starts when you begin and the exam submits itself when time runs out.
- Move freely with Previous, Next or the numbered navigator, and flag any question to come back to.
- No feedback is shown until you submit. Unanswered questions count as wrong.
- Nothing is sent anywhere; the exam runs entirely in your browser.
Practice Test
These are original questions written by the Trade Exam Hub editorial team from the cited official sources. They are not real exam questions, and no exam body endorses this site. Full Mock Exams.
What the CSLB C-10 Electrical Mock Exam Covers
Each attempt draws 100 questions at random from a pool of 162. The pool covers these topics. Your score report breaks your result down the same way, so you can see which areas need more study.
| Topic | Questions in Pool | Share |
|---|---|---|
| CSLB Exam Rules, Fees and Sections | 60 | 37% |
| Cal/OSHA Electrical Safety Orders | 48 | 30% |
| OSHA Electrical and Lockout Rules | 54 | 33% |
About 78% of the pool is recall and core-concept questions. The other 22% are harder applied questions, such as scenarios, calculations or details that are easy to confuse.
Editor's Note on the CSLB C-10 Electrical Exam
Retake rules (18-month window, 21-day wait) are in the CSLB original license application. Source: CSLB Application for Original Contractors License.
CSLB C-10 Electrical Mock Exam Pacing Plan
You have 180 minutes for 100 questions, which is about 1.8 minutes per question. Use these checkpoints to stay on pace:
| Checkpoint | Be at or past question | Elapsed time |
|---|---|---|
| First quarter | 25 | 45 min |
| Halfway | 50 | 90 min |
| Three quarters | 75 | 135 min |
If you are behind, flag any question that is taking too long and move on. Leave a few minutes at the end to go back to your flagged questions. Unanswered questions count as wrong, so give an answer to every question before time runs out.
What Score Do You Need?
To pass, you need 70 of 100 correct (70%), so you can miss up to 30 questions. The official pass mark is not published in a form we can verify, so treat this as a practice target. We suggest scoring 10 points above the pass mark on two attempts in a row before you book the real exam, because the pool here is smaller than the official bank.
Sample CSLB C-10 Electrical Mock Exam Questions
Here are three questions from the pool, with their answers and sources.
Q1. How many major sections does the CSLB C-10 Electrical trade exam cover?
- Five (correct)
- Four
- Six
- Three
Source text: “The Electrical (C-10) Examination is divided into five major sections…” Reference: CSLB C-10 Electrical Study Guide (13E-10, 03/2026).
Q2. Cal/OSHA's Low-Voltage Electrical Safety Orders cover systems up to what nominal voltage?
- 600 volts (correct)
- 480 volts
- 1,000 volts
- 250 volts
Source text: “operating or intended to operate on systems of 600 volts, nominal, or less…” Reference: Cal/OSHA Title 8 §2305.2.
Q3. Which sections of OSHA Subpart K contain the safety-related work practices?
- 1926.416 and 1926.417 (correct)
- 1926.402 through 1926.408
- 1926.431 and 1926.432
- 1926.449
Source text: “Safety-related work practices are contained in §§ 1926.416 and 1926.417…” Reference: 29 CFR 1926.400.
How to Use Your Score Report
- Sort by topic. Start your next study session with any topic where you scored below 70%.
- Read the source. Each answer cites a section or quotes its source text. Read the surrounding passage, not just the answer line.
- Drill, then retest. Use the adaptive practice test on your weak topics. It gives you more of the kinds of questions you miss. Then take this mock again for a new random set.
- Return to the guide. The CSLB C-10 Electrical guide covers exam fees, scheduling, retake rules and what to bring on test day.
Sources Behind These Questions
Questions in this pool cite these references: CSLB C-10 Electrical Study Guide (13E-10; CSLB List of All Fees; CSLB Application for Original Contractors License; CSLB Studying for the Examination; Cal/OSHA Title 8 §2305.2; Cal/OSHA Title 8 §2320.1. Each question shows its exact reference when you review your answers.
Frequently Asked Questions
How many questions are on the CSLB C-10 Electrical mock exam?
This mock has 100 questions, drawn at random from a pool of 162, so each attempt is different. The count is a practice format, because the official length is not published or our bank covers only part of the exam.
How long do I get, and how fast should I work?
The timer is set to 180 minutes, or about 1.8 minutes per question. Aim to be past question 50 by minute 90.
What score do I need to pass the CSLB C-10 Electrical mock?
70%, which is 70 of 100 correct. That is a practice target, not an official pass mark.
Are these real CSLB C-10 Electrical exam questions?
No. They are original questions written from the official sources cited in each answer, and no exam body endorses them. Use them to find weak topics, then confirm the details in the source.
Is the CSLB C-10 Electrical mock exam free?
Yes. There is no login and no sign-up, and the exam runs entirely in your browser. Nothing you enter is sent to us.