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

1. A rooftop PV array has conductors running through a conduit exposed to sunlight on a roof with an ambient temperature of 40°C. The conduit is 2 inches above the roof surface. What is the NEC temperature adjustment factor for 90°C-rated conductors?

A) 1.00
B) 0.87
C) 0.91
D) 0.96

2. A PV array's tilt is 15° at a latitude of 35°N. What is the annual energy loss compared to optimal tilt?

A) 1-2%
B) 10-12%
C) 6-8%
D) 3-5%

3. According to the NEC, if the PV system disconnect and the building service disconnect are at different locations, there MUST be a/an:

A) Permanent plaque or directory that indicates the locations of both disconnects.
B) Permanent plaque or directory that indicates the location of the PV utility connection.
C) Interface that shuts down the PV system if the utility connection is lost.
D) Means of locking out both disconnects when the PV system inverter is being serviced.

4. Which of the following MUST be referenced for determining a site's design wind speed?

A) The ASHRAE Handbook_fundamentals in effect
B) The NEC version in effect
C) The module manufacture's design wind speed
D) The jurisdiction's local building code in effect

5. A PV system is installed in a location with an average annual ambient temperature of 30°C. If the module's NOCT (Nominal Operating Cell Temperature) is 45°C, what is the expected cell temperature under standard operating conditions (800 W/m² irradiance)?

A) 55°C
B) 45°C
C) 60°C
D) 50°C

Solutions: