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

1. A PV array is tested with an IV curve tracer. The fill factor is 0.70, lower than the expected 0.80. What does this indicate?

A) Series resistance increase
B) Shunt resistance decrease
C) Open-circuit voltage drop
D) Short-circuit current rise

2. A PV system includes a 15 kW array with a maximum power point voltage of 450V and current of 33.33A.
The inverter efficiency is 97%, and the AC output voltage is 240V. What is the AC output current under STC?

A) 58.5A
B) 62.5A
C) 60.6A
D) 64.8A

3. Which of the following MUST be referenced for determining a site's design wind speed?

A) The jurisdiction's local building code in effect
B) The NEC version in effect
C) The ASHRAE Handbook_fundamentals in effect
D) The module manufacture's design wind speed

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

5. A ground-mount PV system is planned for a site with a soil bearing capacity of 2000 psf. The array footing design requires a minimum bearing pressure of 1500 psf. What is the safety factor for this installation?

A) 2.0
B) 0.75
C) 1.33
D) 1.5

Solutions: