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(C-10) Electrical | CA Contractor Exam Prep

(C-10) Electrical | CA Contractor Exam Prep

MASTER THE CSLB CONTRACTOR’S EXAM

The Fastest Path to Your California license. Built by licensed contractors and industry veterans, our streamlined system cuts through the academic fluff. Engineered specifically for electrical professionals, it gives you the tools to dominate the official state exam and secure your passing score.

🗺️ Study at your pace:

Exclusive online study guides, video/audio modules, flashcards, practice questions, and simulated final exams.

🎯 Engineered to pass:

We target core trade reviews, state regulations, construction math, industry vocabulary, and exam insights.

Original price was: $249.00.Current price is: $199.00.

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Category:

STATE REQUIREMENT: First-time applicants must pass both the (C-10) Electrical Trade exam and Law & Business exam.

Beat The State Backlog: Turn application wait times into an advantage. Prep while your paperwork processes, become exam-ready in 6–12 weeks, and be ready to test the moment you're approved.

Review CSLB Requirements →

Free—Electrical—Practice Test

Ready to pass the C-10 trade exam and grow your contracting career?

Get a feel for the phrasing and format you’ll face—before you set foot in the PSI exam center.

  • Quick 20-Question Preview: A random sample spanning Basic Electrical Theory, Plan & Circuit Symbols, Tools & Equipment, California Electrical Code, Wiring, and Health & Safety.
  • Real Exam Feel: Instant feedback that shows you question styles and difficulty levels you’ll face on exam day.

Keep in mind: This is a short warm-up only — not a full baseline score. The actual state exam draws from hundreds of rotating, highly technical questions. Passing here does not guarantee a license, but struggling will quickly reveal your blind spots. For true exam-day readiness, complete the full study course.

Welcome to your free C-10 Electrical Quiz

1. 
What type of switch is used to control a light from more than one location?

2. 
What is the maximum number of general-use outlets allowed on a commercial 15-amp, 120-volt circuit if each is rated at 180 VA

3. 
In clay soil, how deep may a trench be before it requires shoring?

4. 
What is the largest hand bender for bending EMT?

5. 
What is the minimum size rebar that can be used for grounding?

6. 
How much is an installation de-rated for a raceway with 5 conductors?

7. 
When working in a wet location, which of the following do you use?

8. 
How do you find circumference?

9. 
What is a time delay intended to protect?

10. 
"A building measures 8,500 square feet. The annual cost for cooling is $8.75 per square foot, and the annual cost for lighting is $0.45 per square foot. How much is the total cost for one month?" (Round up to the nearest dollar)

11. 
What sort of PPE (personal protective equipment) is recommended when using cleaning solvent?

12. 
What should be done with lifelines, safety harnesses, and shock-absorbing lanyards that have been subjected to impact loading?

13. 
What is the longest standard length of a scaffold plank?

14. 
On a 120V circuit, what color is the (protective) ground wire?

15. 
What is the minimum distance apart that acetylene and oxygen cylinders must be stored?

16. 
Which of the following is a correct method for storing acetylene cylinders?

17. 
Which of the following is the best choice for hoisting a full gas cylinder?

18. 
Cylinders containing ______ shall not be taken into confined spaces.

19. 
A dry chemical or carbon dioxide fire extinguisher rated at least ______ must be kept near operations where bottled fuel gases are being used.

20. 
No more than ______ of paints, solvents, and chemicals may be stored in a room unless an approved safety storage cabinet is present.

Master Every Testing Section

To earn your C-10 License and pass the trade portion of your exams, you must prove your comprehensive knowledge across the five major sections of the official California C-10 trade examination. Our study portal is strategically built to accurately mirror this exact CSLB testing breakdown, giving you the specific tools and knowledge needed to walk in fully prepared.

The C-10 Electrical Exam Breakdown

Section 1. Planning and Estimating (28%)

  • Existing system evaluation
  • Plan and specification interpretation
  • Electrical calculations
  • Code requirements
  • Material selection
  • Energy production and storage project planning (photovoltaic, wind, generators, batteries, capacitors)
What it Covers: This section tests your “office and engineering” skills before any physical work starts. You will need to look at blueprints, determine the power demands of a building, calculate the correct wire and conduit sizes, and select the right materials. It also tests your knowledge of the California Electrical Code (Title 24), specifically regarding how to plan modern solar panels, generators, and battery storage systems.

Section 2. Rough Wiring (27%)

  • System layout
  • Clearance and accessibility requirements
  • Raceway and panel installation
  • Wire and equipment installation
  • Grounding and bonding
  • Energy production and storage rough wiring (photovoltaic, wind, generators, batteries, capacitors)
What it Covers: This evaluates the heavy structural work done before the drywall goes up. You will be tested on how to properly route and bend conduit (raceways), install main electrical panels, pull thick feeders, and maintain legally required clearance spaces around equipment. It places a massive emphasis on grounding and bonding, which is the most critical code requirement for preventing electrical shocks and fires.

Section 3. Finish Wiring and Trim (11%)

  • Finish device placement and installation
  • Motor and equipment installation
  • Wire and equipment labeling
  • Trims and sealants
  • Energy production and storage finish wiring (photovoltaic, wind, generators, batteries, capacitors)
What it Covers: This section deals with the final connections that make a building operational. You must know how to properly wire and trim out outlets, switches, GFCI/AFCI devices, and light fixtures. It also covers more complex commercial equipment, such as connecting industrial motors, transformers, and the final control wiring for solar and battery systems, alongside proper wire labeling.

Section 4. Startup, Troubleshooting, and Maintenance (16%)

  • System energizing and testing
  • Common electrical problems
  • Location, repair, and replacement of inoperable electrical wires/components
  • Selection and use of electrical testing equipment
  • Energy production and storage system performance (photovoltaic, wind, generators, batteries, capacitors)
What it Covers: This measures your detective skills and diagnostic logic. It tests how to safely turn on the power to a new system for the first time and how to use specialized testing tools like multimeters, megohmmeters, and circuit tracers. You will have to answer questions on how to isolate and repair common electrical failures like short circuits, open neutrals, bad grounds, and voltage drops.

Section 5. Safety (18%)

  • Lockout/tagout procedures
  • Personal protective equipment (PPE)
  • Tools/equipment
  • Hazardous materials and job site environments
What it Covers: This focuses entirely on keeping your crew alive and avoiding heavy fines. It tests strict compliance with Cal/OSHA and NFPA 70E safety standards. You will be asked about proper Lockout/Tagout (LOTO) protocols to ensure circuits aren’t accidentally turned on while someone is working, arc flash protection boundaries, safe ladder and scaffolding placement, and wearing the correct shock-resistant safety gear (PPE).

* Percentages are approximate and directly reflect the official CSLB exam blueprint.

Engineered for Total C-10 Electrical Exam Readiness

When failure is not an option, skip the guesswork. Every failed attempt costs you additional PSI testing fees and triggers a 21-day state lockout that burns through your strict 18-month application window. You get 365 days of unlimited, 24/7 access to the ultimate online test preparation program from any device with internet access.

What’s Included in Your One-Year Subscription

This course covers the C-10 Technical Trade exam. Please note: The mandatory California Law and Business Exam is sold separately. Looking for both? Check out our bundle option.

Course Details

Comprehensive Online Trade Course Manual

Digital, read-only study guides with clear, direct summaries of the state codes.

  • Core Trade Deep Dive: Covers the major topics of the State exam. Includes Basic Electrical Theory, Electrical Materials, Electrical Tools, Equipment and Meters, and Plan and Circuit Symbols.
  • Code Summaries: Clean, easy-to-read breakdowns from the California Electrical Code.
  • Safety Regulations: Dedicated Title 8 Health & Safety compliance tracks.

If you need a hard copy manual you may purchase one at checkout for an additional charge.

 

Targeted Audio & Video Lectures

Over 3 hours of expert classroom instruction:

  • General Trade Knowledge (107 Minutes): Master core field concepts as experts walk you directly through the trade manual.
  • Math Review (35 Minutes): Whiteboard breakdowns of the Architect’s scale, geometry, and essential estimating formulas.
  • Health and Safety (59 Minutes): Mandatory Cal/OSHA Title 8 codes.

Audio lectures can be downloaded for on-the-go listening; video lectures are streaming-only.

 

Three Flexible Online Study Modes:

Build your testing endurance with unlimited 24/7 access to approximately 1050 realistic, exam-style questions using the following modes:

  • Virtual Flashcards: Perfect for rapid-fire recall of definitions, codes, and safety signals. Ability to mark if your answer was either correct, wrong, or flag it to review later..
  • Non-Graded Quizzes: Ideal for relaxed, stress-free learning and reviewing question structures.
  • Timed Exam Simulations: Build your mental endurance by taking full-length exams under actual CSLB time restrictions.

 

Online practice exams require an active internet connection and cannot be downloaded for offline use.

💡 Pro-Tip for Success

Our practice materials include detailed, step-by-step explanations for every single answer. We focus on teaching you the core construction principles behind the data, ensuring you are fully prepared to select the right answer even if the state words their actual exam questions differently on test day!

Official Testing Resources & Links

CSLB License Examination Information Guide

Click here to download the official CSLB testing blueprint and details.

PSI CSLB Test Takers Info

Click here to review test site rules, scheduling, and facility protocols.

CSLB – FAQs

Click here to read frequently asked questions about the contractor testing process.

Forms and Application

Click here to access state licensing paperwork, fingerprinting forms, and packages.

Track your progress from application to activation with our checklist.

Print this step-by-step roadmap to ensure you never miss a critical form, fee, or CSLB deadline.

Lay the Foundation for Your Success.

Step 1: Customize Your Course (Optional Upgrades)

  • Explore the optional upgrades available in your shopping cart and select any you’d like to add to your digital course.

🗺️ Printed Offline Study Companion:

Printed C-10 Manual (+$60)

Printed trade study manual by Thompson Learning Co.What You Get:

A physical, comb-bound trade manual shipped straight to your door.

It’s designed to lay completely flat on your desk for easy highlighting and offline study.

Buy it once, own it forever.

🎯Mandatory Law & Business Exam Prep Course:

Add to Your Trade Exam Order (+$180)

Required For All Original Licenses:

Every CA contractor must pass this exam to get licensed. It tests business law, contracts, and estimating—not field skills.

Without this knowledge, you risk failing on test day.

 

 

 

 

Step 2: Complete Order & Enrollment Process

  1. Enroll Securely: Complete your order through our encrypted checkout to secure 365 days of unlimited course access.
  2. Receive Your Activation Code: After your purchase, our team will process your enrollment and set up your account. Once your account is ready, we’ll email you your unique activation code.
  3. Start When You’re Ready: We know running a business keeps you busy. Your 365 days of access begin only when you enter your activation code—so you can enroll today and start learning when you’re ready.

Ready to Get Started?

Original price was: $249.00.Current price is: $199.00.

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