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

1. A bifacial array gains 15% additional power from rear-side irradiance. If the front-side output is 10 kW, what is the total output?

A) 11.0 kW
B) 12.5 kW
C) 12.0 kW
D) 11.5 kW

2. A 5 kW PV system has a derate factor of 0.82. The site receives 5.5 PSH daily. What is the expected daily AC energy output?

A) 20.5 kWh
B) 27.5 kWh
C) 22.55 kWh
D) 25.0 kWh

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) Verify that disconnecting device blades are closed and test conductors using an adequately rated detector.
D) Mount inverters on nonconductive supports and temporarily ground one dc circuit conductor.

4. A bank of batteries with capability of supplying 250A and a maximum voltage of 325V is housed in a concrete structure in a very humid location. There is service access alsie between rows of batteries. What is the REQUIRED safety distance between the rows of batteries.

A) 3-1/2 If the building is equipped with a dehumidifier and the batteries are on insulting surfaces
B) 6 ft. When the floor is insulated and no dehumidifier is installed.
C) 3 ft. when insulted conducted conductors are used between terminals.
D) 4 ft Whether or not the building is equipped with a dehumidifier or the batteries are insulting surfaces

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

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

Solutions: