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

1. Thermal imaging infrared cameras can be used to help find which of the following system operational issues?

A) Battery state of charge in a multimode system
B) Blind spot fault in a source circuit
C) Loose PV input circuit terminations in a combiner box
D) Intensity of solar insolation to determine power output

2. The following dc portion of a PV schematic (functionally grounded conductor not shown) is submitted to the building official for permit approval. The building official, who also is he AHJ, allow the system to be installed by requiring what NEC-required MINIMUM size equipment grounding conductor at Location A?

A) #6 aluminum
B) #8 copper
C) #10 copper
D) #12 aluminum

3. When installing an ungrounded PV system with an open-circuit voltage of 450Vdc and a maximum voltage of
3000Vdc which procedures should be followed to establish an electrically safe condition?

A) Apply lockout/tagout devices and install a listed isolation transformer.
B) Determine possible sources electrical supply an avoid exposure to energized conductors or parts.
C) Mount inverters on nonconductive supports and temporarily ground one dc circuit conductor.
D) Verify that disconnecting device blades are closed and test conductors using an adequately rated detector.

4. A system's inverter output is 9 kW at 900 W/m² irradiance. What is the expected output at 1000 W/m²?

A) 10.0 kW
B) 11.0 kW
C) 10.5 kW
D) 9.5 kW

5. 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) 16,250 kWh
C) 16,000 kWh
D) 15,750 kWh

Solutions: