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

1. A module's Voc is 40V at STC. At -5°C with a coefficient of -0.33%/°C, what is the Voc?

A) 44.0V
B) 42.0V
C) 45.0V
D) 43.0V

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

3. A PV system has a nameplate capacity of 10 kW DC and operates with a total system derate factor of 0.85.
What is the expected AC output power under standard test conditions (STC)?

A) 7.5 kW
B) 8.5 kW
C) 9.0 kW
D) 10.0 kW

4. During a site assessment, an installer identifies a 100-foot-tall tree 150 feet south of a proposed PVarray. The site latitude is 40°N. Will this tree cause shading on December 21st between 9 AM and 3 PM solar time?

A) Insufficient data to determine
B) Yes, shading will occur all day
C) No, shading will not occur
D) Yes, shading will occur before 10 AM only

5. According to the NEC, if the PV system disconnect and the building service disconnect are at different locations, there MUST be a/an:

A) Permanent plaque or directory that indicates the locations of both disconnects.
B) Means of locking out both disconnects when the PV system inverter is being serviced.
C) Interface that shuts down the PV system if the utility connection is lost.
D) Permanent plaque or directory that indicates the location of the PV utility connection.

Solutions: