Free Access NABCEP.PVIP.v2022-07-04.q24 Practice Test (Page 3)

Question 6

An installer is hired to troubleshoot a 10-year-old roottop system with open-circuitvoltage of 300V. The ground-fault detection (GFD) device has tripped. The insulation on the exposed source circuit cables has deterlorated with multiple cracks and has no flexibility. Which concern is the MOST likely safely issue when servicing this array?

A.Insulation has become an electrical conductor since it has changed its composition.

B.Short-circuit current is present at the PV source-circuit terminals of the disconnect device because of electrical leakage.

C.Cracked insulation has allowed water intrusion that resulted in oxidation of the copper conductors.

D.Ungrounded conductors are conducing current event the ground-fault device has activated.

Question 7

In the middle of a winter day, the data acquisition system for a ground-mounted PV system with large central inverters sends an email alert that system performance is at 50% based on irradiance and temperature performance calculations. No inverters are completely offline. The closed technician is a 4-hour drive from the site, and there are no cameras on site. Which is the BEST response to this situation?

A.Review power output and weather conditions via the monitoring portal, and review local weather reports.

B.Call the data acquisition company to report a monitoring system failure.

C.Dispatch the technician to the site t investigate the low performance issue in person.

D.Report the low performance to theinverter manufacturer and request that a technical be sent to the site for a warranty claim.

Question 8

On a PV system larger than 100kw, which PV array design will provide the HIGHEST degree of performance monitoring.
Granularity, and ease of troubleshooting performance issues?

A.Multiple-string inverter system with data acquisition system located at each inverter.

B.Multiple-string inverter system with data acquisition system located at each dc combiner

C.Multiple-string inverter system with monitored dc-to-dc converters located at each module

D.Central inverter with data acquisition system located at the inverter.

Question 9

A ground-mounted PV system operating with an open-critical voltage of 550V is in a public park. Which installation procedure will meet NEC requirements for protecting the public from potential electric shock?

A.Ground the PV module frames, but not the mounting racks, to local grounding electrodes.

B.Mount the PV modules on a one-axis (north-south) tracker, with supporting structures listed to UL 2703.

C.Install PV modules with plastic, insulating the frames, and connect to a grounding electrode at the array.

D.Install a physical barrier on the back of the PV modules that prevent that prevents the conductors from being touched.

Question 10

A homeowner is concerned that a 6kWdc PV system might be experiencing a performance issue. The homeowner has noticed what appears to be declining production. The installer analyzes the following data acquisition system (DAS) results for each year since the installation:

Given the data, which is the MOST likely conclusion to draw?

A.There is a problem with the DAS because the peak sun hours do not correlate with production values and the das should be repaired.

B.A combination of normal module degradation combined with cloudy weather has caused lower output in the past few years.

C.The system has experienced above-average degradation and a module warranty claim should be explored.

D.There is an intermittent inverter failure that is causing production to be lower than expected and the inverter should be repaired.

Other Version: 703NABCEP.PVIP.v2024-04-08.q25; 975NABCEP.PVIP.v2022-02-27.q25; 87NABCEP.Trainingdump.PVIP.v2021-11-12.by.victor.22q.pdf

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