Free CSLB C-46 Solar Contractor Exam Practice Test
Realistic 115-question practice exam with instant feedback and score reports.
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About this practice exam
Free CSLB C-46 Solar Contractor Exam practice test with 115 realistic multiple-choice questions, instant grading, and explanations. Administered by PSI. Typical passing score is about 72%. Study with drill mode, category score reports, and a personalized review plan.
Exam format
- 115 multiple-choice practice questions
- Based on the PSI exam format
- Typical passing score: 72%
- Suggested time: 180 minutes
- Drill mode with instant feedback and explanations after each answer
- Category score reports every 25 questions
What's on the exam
This practice test mirrors the weighted categories on the real C-46 Solar exam:
| Category | Weight |
|---|---|
| PV System Installation & Commissioning | 28% |
| Safety | 19% |
| Panel / Collector Installation | 17% |
| Service, Operation & Maintenance | 15% |
| Planning & Estimating | 14% |
| Solar Thermal | 7% |
Study tips
- Review the official exam content outline before your first practice run.
- Take the full practice exam once to establish a baseline score by category.
- Focus review on categories where you score below the passing threshold.
- Re-take missed questions in drill mode until you can explain each correct answer.
- Schedule the real exam only after consistent passing scores on practice tests.
Sample C-46 Solar practice questions
Try a few representative questions below. Each includes the correct answer and a short explanation — the same style you'll see in the full practice test.
- Question 1PV System Installation
Under NEC 690.12, what is the primary purpose of rapid shutdown requirements for PV systems on buildings?
- A.To improve inverter efficiency during peak production
- B.To reduce voltage in the PV system conductors outside the array boundary within 30 seconds(Correct)
- C.To disconnect the utility grid automatically during a power outage
- D.To prevent module micro-cracking during high winds
Explanation
Rapid shutdown (NEC 690.12) is a firefighter and first-responder safety requirement. It limits voltage on conductors outside a defined array boundary so personnel can work safely on the roof after shutdown.
- Question 2Safety
When working on a pitched residential roof to install PV modules, which fall-protection measure is required under Cal/OSHA rules?
- A.Safety glasses only when the roof pitch is under 4:12
- B.A warning line system at least 6 feet from the roof edge with no other protection
- C.Personal fall arrest, guardrails, or other approved fall protection at applicable heights(Correct)
- D.Fall protection is optional for installations under 2 hours
Explanation
Roof work for solar installation typically triggers fall-protection requirements. Contractors must use guardrails, personal fall arrest systems, or other Cal/OSHA-approved methods — not optional based on job duration.
- Question 3Planning & Estimating
A customer wants a PV system sized to offset 10,000 kWh per year in California. Which factor is MOST important when estimating required array size?
- A.Only the inverter nameplate rating
- B.Site-specific production factors such as tilt, azimuth, shading, and local solar resource(Correct)
- C.The number of roof penetrations per module
- D.Whether the customer has a pool pump
Explanation
Annual kWh offset depends on how much energy the array actually produces at that site. Tilt, orientation, shading, and regional irradiance drive production far more than hardware labels alone.
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Frequently asked questions
How many questions are on this C-46 Solar practice test?
This practice test includes 115 multiple-choice questions designed to mirror the format and difficulty of the real CSLB C-46 Solar Contractor Exam.
Is this C-46 Solar practice test free?
Yes. You can start practicing for free. Create an account to save progress, track weak categories, and retake the exam.
Do I get explanations after each question?
Yes. In drill mode you see why the correct answer is right, why distractors are wrong, and practical examples where relevant.
How should I use this practice test to prepare?
Take the full exam under timed conditions, review missed questions by category, then focus study on your weakest sections before scheduling the real exam.
Does this replace official PSI materials?
No. Use this as a supplement alongside official candidate information bulletins, textbooks, and hands-on experience required for your license or certification.
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