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

1. A system's inverter efficiency drops from 97% to 94% due to aging. What is the percentage increase in energy loss?

A) 4.5%
B) 2.1%
C) 3.2%
D) 6.0%

2. A site has an average wind speed of 25 mph and is classified as Exposure Category C per ASCE 7. What is the minimum wind design speed for the PV array structure?

A) 150 mph
B) 110 mph
C) 130 mph
D) 90 mph

3. Which of the following requires a UL listing or its equivalent?

A) Lag screws
B) Grounding electrode clamp
C) System manuals
D) System labels and markings

4. A site survey indicates a residential roof with a 4:12 pitch facing 20° east of south. The local latitude is 35°N, and the optimal tilt for maximum annual production is equal to latitude. What adjustment should be made to compensate for the roof's orientation and tilt to achieve near-optimal output?

A) Rotate modules 20° west to face true south
B) Increase array capacity by 5%
C) Install adjustable racking to match 35° tilt
D) No adjustment needed; output loss is negligible

5. A PV module has a NOCT of 47°C. At 1000 W/m² and 35°C ambient, what is the cell temperature?

A) 59°C
B) 63°C
C) 55°C
D) 47°C

Solutions: