Read Online PVIP Test Practice Test Questions Exam Dumps [Q78-Q100]

QUESTION 78
The AHJ for enforcement of the NEC has which responsibility?

QUESTION 79
A 7KW/ 14 KWh multimode system has been installed at a residence, ac-couple with the customer’s existing
6.7kwh ac PV system. The system providers uninterrupted power to a protect loads subpanel, which is connected to a refrigerator, Microwave, 1.0 ton are conditioner, three lightning circuit, and the 6.7kwac PV system. One month later, the homeowner moves additional circuits to the protected loads subpanel, substantially increasing the loads. Why would this cause, the backfed interconnection breaker in the main service panel to trip?

QUESTION 80
A PV module shows burn marks near the junction box. What is the most likely cause?

QUESTION 81
A module’s STC power is 300W, with a temperature coefficient of -0.40%/°C. At 65°C, what is the power loss percentage?

QUESTION 82
A system’s performance ratio (PR) is calculated as 0.85. If the array capacity is 10 kW and PSH is 5, what is the daily AC output?

QUESTION 83
The following dc portion of a PV schematic (functionally grounded conductor not shown) is submitted to the building official for permit approval. The building official, who also is he AHJ, allow the system to be installed by requiring what NEC-required MINIMUM size equipment grounding conductor at Location A?

QUESTION 84
A module’s Voc is 40V at STC. At -5°C with a coefficient of -0.33%/°C, what is the Voc?

QUESTION 85
A string inverter fails to start in the morning. The DC input voltage is 200V, below the minimum start voltage of 250V. What should be checked first?

QUESTION 86
A 10 kW system has a total derate factor of 0.85 and operates at 5 PSH. What is the daily output in summer with 10% soiling loss?

QUESTION 87
A PV array is installed at a site with an annual average temperature of 25°C and a maximum recorded temperature of 45°C. The module Voc is 50V at STC, with a temperature coefficient of -0.32%/°C. What is the maximum string voltage at the coldest expected temperature of -10°C?

QUESTION 88
A 5 kW system has a PR of 0.80 and operates at 4.5 PSH. What is the monthly energy output?

QUESTION 89
During commissioning, a PV system’s measured Voc is 10% lower than expected. What is the most likely cause?

QUESTION 90
A PV system includes a 600V DC disconnect with a fault current rating of 10 kA. The available fault current from the inverter is 12 kA. What must be done to comply with NEC 110.10?

QUESTION 91
A PV system installation utilizes micro inverters connected to each module of the array. Each micro inverter has a nominal rated output of 250WV. Single phase. The microinverters are listed so that multiple inverters may be connected in parallel to a single feeder circuit, and each inverter has ancable and connector rated for
30A. What is the MAXIMUM number of inverters that may be wired together on a single 30A feeder circuit?

QUESTION 92
A PV system’s inverter displays a ground-fault error. What is the first troubleshooting step?

QUESTION 93
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?

QUESTION 94
A 5 kW system has a daily output of 20 kWh at 5 PSH. What is the total derate factor?

QUESTION 95
A PV connection is being made at the center of a 300 ft. long 200 feeder. See the attack diagram. The feeder originates in the upper third of the 800A main service panel (800A main breaker) with a 200A breaker and terminates in a 200A main-lug-only subpanel. The rated output of the PV system inverter is 100A.

Which are the NIMUMUM actions required to achieve an NEC-compliant installation?

QUESTION 96
Aerial lifts used to hoist equipment and PV modules to roof levels may be fieldmodifiedfor uses other than those intended by the manufacturer with which approval or certification?

QUESTION 97
A PV array with 58 in. X 38 in modules in portrait orientation is to be mounted at a 35 tiit angle on a shingle roof that has a 5:12 pitch. Assuming the support leg is attached to the top of the modules and is perpendicular to its face, what is the length of the support leg for the modules?

QUESTION 98
Which of the following MUST be referenced for determining a site’s design wind speed?

QUESTION 99
A PV array is installed near a pool. What is the minimum distance required from the water’s edge per NEC
690.31?

QUESTION 100
A PV system designer is selecting an inverter for a 12 kW array with a maximum power point voltage range of 300-450V DC. Which inverter specification is most critical to verify compatibility?