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NABCEP PVIP Exam Syllabus Topics:

NABCEP PV Installation Professional (PVIP) Board Certification Sample Questions:

1. A ground-fault protection device (GFPD) trips during commissioning. What is the most likely cause per NEC
690.5?

A) Overcurrent in the inverter output
B) Open circuit in the array
C) Reverse polarity in a source circuit
D) Insulation failure between a conductor and ground

2. An installer is using ½ in lag boits to secure roof-monitoring hardware to rafters through a roof deck. Which of the following should the installer predrill?

A) A pilot hole one-half the length of the bolt
B) A pilot hole one-fourth the length of the bolt
C) A 5/16 in pilot hole through the roof into the rafter
D) A 1/8 in, pilot hole through the roof into the rafter

3. A maintenance inspection reveals cracked module glass. What is the immediate action?

A) Monitor performance
B) Disconnect the string
C) Replace the module
D) Apply sealant to cracks

4. A ground-mount array uses driven piles with a lateral load capacity of 500 lbs. The wind load calculation yields a lateral force of 600 lbs per pile. What must be done?

A) Increase pile depth
B) Use a different foundation type
C) Add additional piles
D) Any of the above

5. A string inverter fails to start in the morning. The DC input voltage is 200V, below the minimum start voltage of 250V. What should be checked first?

A) String sizing
B) Module temperature
C) Inverter firmware
D) AC breaker position

Solutions: