NABCEP Board PVIP

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

1. A module's Voc is 40V at STC. At -5°C with a coefficient of -0.33%/°C, what is the Voc?

A) 42.0V
B) 45.0V
C) 43.0V
D) 44.0V

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

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

3. What is the maximum allowable voltage drop for a PV source circuit conductor run of 100 feet, using 10 AWG copper wire, if the system operates at 48V DC and the design specifies a 2% voltage drop?

A) 1.92V
B) 1.44V
C) 0.48V
D) 0.96V

4. A string inverter fails to start in the morning. The DC input voltage is 200V, below the minimum start voltage of 250V. What should be checked first?

A) Inverter firmware
B) AC breaker position
C) String sizing
D) Module temperature

5. 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) 9 inches
D) 6 inches

Solutions: