QUESTION NO: 1
Per NEC 690.8, a PV source circuit has an Isc of 9.5A. What is the minimum ampacity required for the conductor?
Per NEC 690.8, a PV source circuit has an Isc of 9.5A. What is the minimum ampacity required for the conductor?
Correct Answer: A
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QUESTION NO: 2
A PV system uses 10 AWG USE-2 wire for a 150-foot source circuit run with an Isc of 8A. The terminals are rated at 75°C. What is the ampacity of the conductor after applying NEC temperature and conduit fill adjustments at 35°C?
A PV system uses 10 AWG USE-2 wire for a 150-foot source circuit run with an Isc of 8A. The terminals are rated at 75°C. What is the ampacity of the conductor after applying NEC temperature and conduit fill adjustments at 35°C?
Correct Answer: B
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QUESTION NO: 3
A PV array is installed on a sloped roof with a 6:12 pitch. What is the minimum fastener pullout strength required if the uplift force is 200 lbs per attachment point?
A PV array is installed on a sloped roof with a 6:12 pitch. What is the minimum fastener pullout strength required if the uplift force is 200 lbs per attachment point?
Correct Answer: D
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QUESTION NO: 4
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 bifacial array gains 15% additional power from rear-side irradiance. If the front-side output is 10 kW, what is the total output?
Correct Answer: B
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QUESTION NO: 5
A maintenance inspection reveals cracked module glass. What is the immediate action?
A maintenance inspection reveals cracked module glass. What is the immediate action?
Correct Answer: A
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QUESTION NO: 6
A module's Isc is 8.5A at STC. At 1200 W/m², what is the Isc?
A module's Isc is 8.5A at STC. At 1200 W/m², what is the Isc?
Correct Answer: D
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QUESTION NO: 7
A site survey indicates a residential roof with a 4:12 pitch facing 20° east of south. The local latitude is 35°N, and the optimal tilt for maximum annual production is equal to latitude. What adjustment should be made to compensate for the roof's orientation and tilt to achieve near-optimal output?
A site survey indicates a residential roof with a 4:12 pitch facing 20° east of south. The local latitude is 35°N, and the optimal tilt for maximum annual production is equal to latitude. What adjustment should be made to compensate for the roof's orientation and tilt to achieve near-optimal output?
Correct Answer: C
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QUESTION NO: 8
During commissioning, a PV system's measured Voc is 10% lower than expected. What is the most likely cause?
During commissioning, a PV system's measured Voc is 10% lower than expected. What is the most likely cause?
Correct Answer: B
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QUESTION NO: 9
A site has a known magnetic declination of 14 west. What should the corrected azimuth reading of the array be in order to be facing true south?
A site has a known magnetic declination of 14 west. What should the corrected azimuth reading of the array be in order to be facing true south?
Correct Answer: C
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QUESTION NO: 10
A 10 kW PV array uses 300W modules with a Voc of 40V and an Isc of 9A. The inverter has a maximum DC input of 600V and 25A. What is the maximum number of modules that can be connected in a single string?
A 10 kW PV array uses 300W modules with a Voc of 40V and an Isc of 9A. The inverter has a maximum DC input of 600V and 25A. What is the maximum number of modules that can be connected in a single string?
Correct Answer: C
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QUESTION NO: 11
When performing a system checkout after completing the installation, what is the SAFEST sequence of tasks to detect installation errors before closing any disconnects to the inverter, charge controller, or batteries?
When performing a system checkout after completing the installation, what is the SAFEST sequence of tasks to detect installation errors before closing any disconnects to the inverter, charge controller, or batteries?
Correct Answer: D
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QUESTION NO: 12
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 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?
Correct Answer: B
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