SHI Cheat Sheet 2026

The 30 highest-yield SHI facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. How do SHI professionals maintain digital competency? → Through ongoing training and staying current with technological advances
2. What maintenance should be done annually? → Check key system components and fluid
3. What is the primary factor evaluated during a solar site assessment to determine energy production potential? → Solar radiation availability (insolation)
4. Which hazard is common during installation of solar thermal systems? → Falls and thermal burns
5. What is the first step in risk assessment for Solar Heating Installer Certification professionals? → Identifying potential hazards and vulnerabilities in the specific context
6. What type of collector is best for high-temperature applications? → Evacuated tube collector
7. A solar domestic hot water system is set to deliver water at 60°C (140°F) to prevent Legionella growth. What additional risk does this temperature introduce? → Scalding hazard at fixtures, requiring thermostatic mixing valves
8. What should be done after completing system installation? → Commission and test the system
9. Why is it important to wear UV-protective sunglasses when handling unglazed or glazed flat-plate collectors during outdoor installation? → Both A and C are valid risks
10. In continuous process improvement for a solar installation company, a 'lessons learned' session after project completion primarily aims to: → Capture what worked and what failed so future projects benefit from the experience
11. What distinguishes a peer-reviewed study from other publications? → Independent experts evaluated the methodology and conclusions before publication
12. Why is periodic inspection important in solar thermal systems? → To identify and address system issues early
13. What is a common symptom of a malfunctioning controller? → No system response or incorrect data
14. What is the benefit of standardized digital reporting in Solar Heating Installer Certification practice? → It ensures consistency, enables comparison, and facilitates compliance
15. What is the risk of not installing a check valve on the collector supply line of a thermosiphon or pump-driven solar system? → Reverse thermosiphoning at night, cooling the storage tank
16. When verifying collector array wiring on a photovoltaic-assisted solar thermal system, which quality check is specific to the electrical subsystem? → Verifying open-circuit voltage and short-circuit current match the module datasheet values
17. Which of the following factors does NOT typically affect the available solar resource at an installation site? → Magnetic declination of the site
18. What is a risk register used for in Solar Heating Installer Certification practice? → Tracking identified risks with their status, controls, and owners
19. Which environmental condition should prompt an installer to apply additional corrosion-resistant coatings or stainless hardware on a coastal installation? → Salt-laden marine air accelerating galvanic and general corrosion
20. A solar collector reaches stagnation temperature on a hot summer day. What is the PRIMARY risk this creates in a glycol-filled system? → Glycol degradation producing acidic compounds
21. What role does documentation play in Solar Heating Installer Certification client communications? → It creates clear records of discussions, decisions, and agreements
22. Which tool is commonly used to identify and quantify shading obstructions during a solar site assessment? → Solar Pathfinder
23. What component circulates fluid in an active solar thermal system? → Pump
24. Why is a performance test conducted? → To confirm system efficiency and functionality
25. Which code typically applies to plumbing aspects of solar installations? → IPC
26. How should an SHI professional approach a novel situation not covered by standard procedures? → Apply foundational principles, assess risks, consult resources, and document decisions
27. What is a corrective action in Solar Heating Installer Certification quality systems? → A systematic response to eliminate causes of nonconformity and prevent recurrence
28. What is the purpose of flushing the system? → To clear buildup and sediment
29. What is 'solar insolation' as used in solar thermal site assessments? → The amount of solar radiation energy received on a surface over a period of time
30. How often should risk assessments be reviewed in SHI practice? → At regular intervals and whenever significant changes occur