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

1. Which of the following is an NEC-indicate means to identify PV source and output circuits at accessible points of termination connection, and splices?

A) Tagging
B) Conduct stickers
C) Placards
D) Insulation type

2. A 15 kW system has a total derate factor of 0.87. After 3 years at 1% degradation/year, what is the output?

A) 13.0 kW
B) 12.8 kW
C) 12.6 kW
D) 13.2 kW

3. A PV system has a 1000V DC array feeding a transformerless inverter. What is the minimum insulation rating for the DC conductors per NEC 690.35?

A) 1000V
B) 1500V
C) 600V
D) 2000V

4. A grid-tied PV system uses a transformerless inverter with a maximum DC input of 1000V. The array consists of 20 modules, each with a Voc of 45V. What is the NEC 690.7 correction factor for a low temperature of -15° C if the temperature coefficient is -0.30%/°C?

A) 1.15
B) 1.12
C) 1.21
D) 1.18

5. A PV system is designed for a location with a peak sun hours (PSH) value of 4.5. The daily load is 18 kWh, and the system efficiency is 80%. What is the minimum array size required in kW?

A) 6.0 kW
B) 5.0 kW
C) 4.0 kW
D) 7.5 kW

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