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

1. A PV array is installed on a sloped roof with a 6:12 pitch. What is the minimum fastener pullout strength required if the uplift force is 200 lbs per attachment point?

A) 300 lbs
B) 200 lbs
C) 600 lbs
D) 400 lbs

2. A 1. 100 ft, 2 ranch home with cathedral callings has a 14 ft. x 41 ft. 8 in , south-facing , composite shingle roof. An engineer has determined that the home's 2 in, x 6 in. on-center roof rafters are strong enough to gold a solar electric system. The system will have 62.25 in. x 32.50 in. modules with a 1-in gap between modules and a standard twin-rill mounting system number of modules that can fit on the roof on under these conditions?

A) 28 modules in portrait
B) 35 modules in landscape
C) 40 modules in landscape
D) 30 modules in portrait

3. During commissioning, a PV system's measured Voc is 10% lower than expected. What is the most likely cause?

A) Open circuit in a string
B) High ambient temperature
C) Shading on one module
D) Inverter malfunction

4. Which of the following voltages should be included on the dc disconnected label to indicate MAXIMUM system voltage?

A) Source circuit V
B) 600 V
C) Non-temperature-corrected V
D) Temperature-corrected V

5. Per NEC 690.8, a PV source circuit has an Isc of 9.5A. What is the minimum ampacity required for the conductor?

A) 9.5A
B) 14.25A
C) 15.0A
D) 11.875A

Solutions: