SHI Study Guide 2026
Everything you need to pass the SHI exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
SHI exam key facts
- The NABCEP Solar Heating Installer examination consists of 70 multiple-choice questions, of which 60 are scored and 10 are unscored pilot questions. Source
- Candidates have a time limit of 4 hours to complete the NABCEP Solar Heating Installer examination. Source
- Candidates who fail the NABCEP Solar Heating Installer examination may retake it up to four times within their one-year eligibility period, waiting 2 weeks between attempts. Source
- The NABCEP Solar Heating Installer certification is valid for three years from the date of issuance. Source
📋 SHI Exam Format at a Glance
📚 SHI Topics to Study (24)
✍️ Sample SHI Questions & Answers
1. During final inspection, the inspector finds that the pressure relief valve discharge pipe terminates inside the mechanical room wall cavity. What is the quality concern?
PRV discharge pipes must terminate in a visible, safe location so that activation can be detected and scalding fluids are safely directed away from occupants and structure.
2. What is the first step in risk assessment for Solar Heating Installer Certification professionals?
Risk assessment begins with systematic identification of hazards and vulnerabilities specific to the Solar Heating Installer Certification practice context.
3. An installer discovers that a prior contractor connected a copper collector loop directly to a galvanized steel storage tank without a dielectric fitting. What long-term risk does this create?
Copper and galvanized steel form a galvanic couple in the presence of water or glycol; the steel (less noble) corrodes rapidly, risking leaks and tank failure.
4. A company reviews warranty claim data and finds that 70% of claims involve controller sensor failures. Using a Plan-Do-Check-Act (PDCA) cycle, what is the 'Plan' step?
The 'Plan' phase of PDCA requires understanding the problem and its root causes before defining and implementing a solution.
5. Which system does not require electrical components?
A passive solar thermal system is designed to operate without the need for electrical components like pumps or controllers. Instead, it relies on natural physical principles such as convection and thermosiphoning to circulate the heat transfer fluid or air. This design makes passive systems simpler, more reliable, and independent of external power sources for operation.
6. Why should pipe insulation be UV-resistant?
Pipe insulation in solar thermal systems is often exposed to direct sunlight and harsh outdoor elements. UV-resistant insulation is crucial because ultraviolet (UV) radiation from the sun can degrade and break down standard insulation materials over time, reducing their effectiveness and lifespan. UV resistance ensures the insulation maintains its thermal properties, protecting the pipes and extending the system's operational life.
🎯 Free SHI Practice Tests
📖 SHI Guides & Articles
What Practice Test Geeks adds beyond an AI chat for SHI
An AI chatbot can quiz you, but it can't reproduce the exam conditions or keep your record. Here you get:
- A timed, full-length SHI mock exam — 70 questions in 240 minutes with a 75% pass mark, modeled on the official exam's question count and time limit, followed by a score report broken down by exam domain.
- A fixed SHI question bank: the same test every attempt, so your score is comparable from one try to the next instead of changing with every regenerated quiz.
- Progress saved on your device: completed tests, scores and missed questions stay in My Progress, so you can retake only what you got wrong.
- A printable SHI cheat sheet you can print or save as a PDF.
- SHI flashcards built from the same question bank.
- Free SHI practice tests with the correct answer shown after each question.
How this page was made: written with AI tools and published by Nathan Beja, founder of Practice Test Geeks, who is responsible for its content. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy
Sources & references
Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy
- nabcep.org — Registration, retake policy, score release, score validity, test delivery, test dates, eligibility, exam format, time limit, retake fee · verified Oct 2026