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

1. On a PV system larger than 100kw, which PV array design will provide the HIGHEST degree of performance monitoring.
Granularity, and ease of troubleshooting performance issues?

A) Multiple-string inverter system with monitored dc-to-dc converters located at each module
B) Central inverter with data acquisition system located at the inverter.
C) Multiple-string inverter system with data acquisition system located at each dc combiner
D) Multiple-string inverter system with data acquisition system located at each inverter.

2. A PV module is mounted with a 2-inch standoff from a shingle roof. What is the minimum clearance required for fire access per the International Fire Code (IFC)?

A) 6 inches
B) 9 inches
C) 1 inch
D) 3 inches

3. Per NEC 690.11, what is the maximum allowable DC voltage for a PV system requiring arc-fault circuit protection?

A) 150V
B) 600V
C) 80V
D) 1000V

4. 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 5/16 in pilot hole through the roof into the rafter
B) A pilot hole one-half the length of the bolt
C) A 1/8 in, pilot hole through the roof into the rafter
D) A pilot hole one-fourth the length of the bolt

5. When commissioning a PV system, which test is most critical to verify proper operation of the array before connecting to the inverter?

A) Insulation resistance test
B) Open-circuit voltage test
C) Short-circuit current test
D) Ground-fault detection test

Solutions: