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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) 0.87
B) 1.00
C) 0.91
D) 0.96

2. 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) 60°C
B) 45°C
C) 55°C
D) 50°C

3. A PV system was installed in July 2017 under the 2017 NEC. The system has a string inverter located inside a garage on a wall 10 ft, from the outside wall and 1oft, from the ac load center at the point of utility connection. The PV system has a PV array on the roof. Which of the following represents the PV rapid shutdown system requirement for the controlled PV system conductors associated with this PV array?

A) More than 10ft, from the PV array or more than 5 ft. in length inside the building
B) More than 1 ft, from the VP array and more than 5 ft. In length the building.
C) More than 1 ft, from the PV array or more than 3 ft, from the point of entry of the building.
D) Within the array boundary and more than 3.ft from the point of entry of the building.

4. A technician has been called to a scale due to a low-performing array. The technician will perform tests in the
24-source circuit combiner box. After putting on the correct PPE and turning off and performing lock.tagout of the inverted and combiner disconnect. Which is the next step to safely begin electrical testing in the combiner box?

A) Open all fuse holders in the combiner box.
B) Test for voltage on the positive out
C) Test for current on each source circuit coming into the combiner box.
D) Remove any surge suppression devices from the circuits.

5. A module's power drops by 0.5%/year. After 10 years, what is the output if the original power is 320W?

A) 304W
B) 310W
C) 288W
D) 316W

Solutions: