PV Installation Test 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.
Q11Which of the following grounding methods is required for a PV array mounted on a metal roof?
✓ Correct answer: B. A grounding electrode conductor connected to the building's grounding electrode system
A grounding electrode conductor connected to the building's grounding electrode system is required for PV arrays on metal roofs to ensure proper grounding and safety.
Q12What personal protective equipment (PPE) is required when working with batteries in a PV system installation?
✓ Correct answer: A. Safety glasses, face shield, chemical-resistant gloves, and protective clothing
Safety glasses, face shield, chemical-resistant gloves, and protective clothing are required PPE when working with batteries to protect against chemical exposure and electrical hazards.
Q13When installing conduit for PV source circuits on a flat roof, what is the required support spacing for rigid metal conduit?
✓ Correct answer: D. Every 10 feet
Rigid metal conduit requires support at intervals not exceeding 10 feet as specified by NEC to prevent sagging and maintain structural integrity.
Q14What is the correct procedure for installing PV modules in areas with high wind loads?
✓ Correct answer: C. Use additional mounting points and follow racking manufacturer's high wind zone requirements
Using additional mounting points and following the racking manufacturer's high wind zone requirements ensures secure installation in high wind areas and prevents module damage.
Q15According to NEC 2017, what is required for labeling a PV system disconnect?
✓ Correct answer: B. Reflective, permanently attached signs with minimum 3/8-inch letters
NEC 2017 requires that PV system disconnects be labeled with reflective, permanently attached signs with minimum 3/8-inch letters for visibility and durability.
Q16What is the proper torque specification range typically used for module-to-rail connections?
✓ Correct answer: A. 10-15 ft-lbs, but always verify with manufacturer's documentation
Module-to-rail connections typically require 10-15 ft-lbs of torque, but the exact specification should always be verified with the manufacturer's documentation to ensure proper installation.
Q17When installing a junction box for PV source circuits, what is the minimum working clearance required in front of the box according to NEC?
✓ Correct answer: D. 3 feet
NEC requires a minimum working clearance of 3 feet in front of junction boxes to provide adequate space for safe access and maintenance.
Q18Which of the following is a proper method for installing conductors through a building's roof?
✓ Correct answer: C. Using appropriate flashing and weatherproofing methods designed for electrical penetrations
Using appropriate flashing and weatherproofing methods designed for electrical penetrations ensures a watertight seal and maintains the building's weather resistance.
Q19What is required when installing microinverters or power optimizers in a PV system?
✓ Correct answer: B. Mapping serial numbers to their physical locations in the array
Mapping serial numbers to physical locations is essential when installing microinverters or power optimizers for proper system monitoring and troubleshooting.
Q20According to NFPA 70E, what should an installer do before working on a PV array that has been in operation?
✓ Correct answer: A. Verify the array is de-energized using proper testing equipment
NFPA 70E requires verification that the array is de-energized using proper testing equipment before beginning work to ensure worker safety from electrical hazards.
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