Solar PV Maintenance Exam Prep practice questions and answers 2026. Tap an option to test yourself — you'll see the correct answer and a plain-English explanation for every question. Free, no login.
Q21When verifying the installation of a PV array mounting system, which document should be referenced to confirm proper rail spacing?
✓ Correct answer: D. Manufacturer installation instructions
Manufacturer installation instructions provide specific requirements for mounting system components, including rail spacing requirements which are critical for ensuring structural integrity and warranty compliance.
Q22During a visual inspection of a rooftop PV system, you notice that the array does not match the layout in the approved design documents. What is the appropriate next step?
✓ Correct answer: C. Document the discrepancies and determine if the changes affect system performance or code compliance
When an installation does not match the approved design, it's essential to document the discrepancies and determine if the changes affect system performance or code compliance before proceeding with commissioning.
Q23According to NEC requirements, what must be visible on all PV system disconnecting means?
✓ Correct answer: B. Clear labeling indicating their purpose
The NEC requires that all disconnecting means be clearly labeled to indicate their purpose and the equipment they control, ensuring safety during maintenance or emergencies.
Q24During a mechanical inspection of module mounting, what should be verified regarding the mounting hardware?
✓ Correct answer: A. All hardware is properly installed according to manufacturer specifications
Verifying that all hardware is properly installed according to manufacturer specifications is critical for ensuring the structural integrity of the array and preventing failures during high wind or snow events.
Q25Which of the following is a critical component of a visual inspection for ground-mounted PV arrays?
✓ Correct answer: D. Verification of proper grounding
Verification of proper grounding is critical for safety and code compliance in ground-mounted arrays, as it provides protection against electrical faults and lightning.
Q26When inspecting electrical conduit installations for a PV system, what NEC requirement must be verified?
✓ Correct answer: C. Conduit is properly supported and secured at required intervals
The NEC requires proper support and securing of conduit at specified intervals to prevent sagging, damage, and potential conductor insulation issues over time.
Q27What document should be referenced to verify that the correct modules are installed in a PV system?
✓ Correct answer: B. Approved design specifications
The approved design specifications list the exact module make and model that should be installed, ensuring the system meets expected performance and compatibility requirements.
Q28During visual inspection of a PV system, you notice module frames in contact with the roof surface. What potential issue does this represent?
✓ Correct answer: A. Potential for water damming and roof leaks
Module frames in contact with the roof surface can cause water damming, leading to roof leaks and damage over time, and may also indicate improper mounting that could affect array integrity.
Q29When inspecting module installations, what should be verified regarding the modules' orientation?
✓ Correct answer: D. Modules are oriented as specified in the approved design
The module orientation should match the approved design to ensure optimal energy production as specified in the system performance calculations.
Q30According to electric service provider requirements, where must a utility-accessible disconnect switch typically be located?
✓ Correct answer: C. At the service entrance or meter location
Most electric service providers require the utility-accessible disconnect to be located at the service entrance or meter location for safety and easy access during emergencies.
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