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

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

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

3. A grid-tied PV system uses a transformerless inverter with a maximum DC input of 1000V. The array consists of 20 modules, each with a Voc of 45V. What is the NEC 690.7 correction factor for a low temperature of -15° C if the temperature coefficient is -0.30%/°C?

A) 1.21
B) 1.15
C) 1.12
D) 1.18

4. A PV system's annual energy production is 15,000 kWh. After maintenance, production increases by 5%.
What is the new annual output?

A) 15,500 kWh
B) 15,750 kWh
C) 16,000 kWh
D) 16,250 kWh

5. A system commissioning test requires verifying rapid shutdown functionality. What is the maximum time allowed for voltage to drop below 30V per NEC 690.12?

A) 30 seconds
B) 20 seconds
C) 10 seconds
D) 60 seconds

Solutions: