Free NABCEP PVIP Exam Questions & Answer from Training Expert TestSimulate

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NEW QUESTION 16
A customer has a 200A service with a 200A rated panel and 200A main breaker located on the street side of the house. There is a 100A breaker located at the opposite end of busbar feeding a 125A subpanel in the backyard. The customer would like to place the inverter the backyard and use the 125 subpanel. Which MAXIMUM inverter(s) output circuit current could be installed?

• A. 30A
• B. 40A
• C. 32A
• D. 42A

Answer: B

 

NEW QUESTION 17
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. Call the data acquisition company to report a monitoring system failure.
• B. Report the low performance to theinverter manufacturer and request that a technical be sent to the site for a warranty claim.
• C. Dispatch the technician to the site t investigate the low performance issue in person.
• D. Review power output and weather conditions via the monitoring portal, and review local weather reports.

Answer: D

 

NEW QUESTION 18
How should stratification be eliminated in a set of large, stationary, stationary flooded lead-acid batteries?

• A. Add 50% diluted sulfuric acid.
• B. Enable equalization.
• C. Rotate the battery positions
• D. Discharge to 80 depth of discharge.

Answer: B

 

NEW QUESTION 19
When doinginitial inspections on a PV system that was installed using racking that is not compliant with UL.2703, an inspector should pay special attention to which electrical attribute?

• A. The equipment grounding conductor must be irreversibly spliced.
• B. The grounding conductor must be bonded directly to the primary grounding electrode.
• C. Racking needs to be bonded to a supplemental grounding electrode conductor.
• D. Each PV module needs to be bonded to the equipment grounding conductor.

Answer: D

 

NEW QUESTION 20
A dwelling has a 200A main load center with a 150 main breaker. Which of the following is the MOST powerful 240V inverter that can be installed in the house using the existing main panelboard with a backfed breaker?

• A. 17, 280W
• B. 21, 600W
• C. 9, 600W
• D. 7, 689W

Answer: A

 

NEW QUESTION 21
A metal condult containing an array circuit with Vmo of 400Vdc is connected to a metal enclosure at the location where the concentric knockouts have been punched by the manufacturer. Which method of attachment should be used?

• A. Sealing locknut
• B. Grounding bushing
• C. Threaded coupling
• D. Insulated bushing

Answer: B

 

NEW QUESTION 22
A homeowner is weighing the PV module options for a roof-mounted solar array. Which is a correct option to present to the homeowner?

• A. Microinverters can be installed with either polycrystalline or monocrystalline modules, negating the need for rapid shutdown compliance.
• B. Building-integrated PV shingles will be flush or nearly flush with other shingles, but the electrical energy produced will be less than polycrystalline or monocrystalline modules.
• C. Rapid shutdown requirements within 1 ft of the array boundary.
• D. Polycrystalline modulesare more shade-tolerance than eitheramorphous or monocrystalline modules and allow a larger array to be installed, including in area where shading could be seasonally problematic.

Answer: A

 

NEW QUESTION 23
A ground resistance measurement on a newly installed grounding electrode indicates a resistance of 130. The earth connection may be improved by connecting the existing electrode to a:

• A. Buried water piping system using 40 ft. of 2 in. PVC piping located 10 ft awat.
• B. Supplemental copper plated steel grounding electrode located 8 ft, away.
• C. Supplemental grounding electrode located 5 ft, away.
• D. Supplement 1/4 in, in thick aluminumplate electrode buried 30 in. down and located 7 ft, away.

Answer: B

 

NEW QUESTION 24
With all other environmental parameters being the same, which would be the expected reduction in KM performance of a PV system after an irradiance drop from 810w/m2 to 740w/m2?

• A. 10.2%
• B. 7.4%
• C. 8.6%
• D. 9.5%

Answer: C

 

NEW QUESTION 25
A grounding electrode is required at the location of all ground-mounted and pole-mounted PV arrays. Which typeof grounding electrode is NOT permitted for arrays. Which type of the grounding electrode is NOT permitted for array grounding?

• A. Concrete-encased 4 AWG copper conductor at least 20 ft, in length
• B. Aluminum structural member in direct contact with the earth for 10ft, or more
• C. Metal underground water pipe in direct contact with the earth for 10 ft. or more.
• D. Metal frame of a building or structure in direct with the earth for 10 ft. or more.

Answer: B

 

NEW QUESTION 26
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. 0
• B. 1
• C. 2
• D. 3

Answer: A

 

NEW QUESTION 27
A PV technician is installing a 6.5KWac inverter using a 40A backfed breaker. The single line shows a 200A panelboard with a 200A breaker, but the installer finds that the panelbord actually has a 150A main breaker.
Which of the following is the CORRECT installation option?

• A. Complete the installation as noted above.
• B. Install a 30A backfed circuit breaker.
• C. Replace the 200A panel with a 150A panel.
• D. Change the main circuit breaker to a 200A unit.

Answer: A

 

NEW QUESTION 28
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 dc combiner
• B. Multiple-string inverter system with data acquisition system located at each inverter.
• 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.

Answer: A

 

NEW QUESTION 29
Which of the following MUST be referenced for determining a site's design wind speed?

• A. The jurisdiction's local building code in effect
• B. The ASHRAE Handbook_fundamentals in effect
• C. The NEC version in effect
• D. The module manufacture's design wind speed

Answer: B

 

NEW QUESTION 30
Which of the following should a PV installer do during dc insulation resistance testing?

• A. Wait until is raining and all wiring is damp to conduct the test.
• B. Close ac and dc disconnects and have the system running for at least 5 minutes before testing.
• C. Remove surge suppression equipment from the circuit being tested.
• D. Connect the megohmmeters's negative terminal to the dc circuit insulation

Answer: D

 

NEW QUESTION 31
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?

• A. Perform visual inspection, install source circuit fuses, and measure open-circuit voltage.
• B. Perform visual inspection, check polarity and measure open-circuit voltage.
• C. Install source circuit fuses, verify that all equipment-grounding conductors are secure, and measure ac line voltage.
• D. Perform visual inspection, install source circuit fuses, and measure open-circuit current.

Answer: B

 

NEW QUESTION 32
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?

• A. Install a 325A at the PV source connection point on the portion of the feeder toward the subpanel, increase the capacity of this portion of the feeder to 325A, add a 200A main breaker to the subpanel, and move the 200A breaker to bottom of the main service panel, away from the 800A main breaker.
• B. Install a 325A breaker at the PV source connection point on the portion of the feeder toward the subpanel. Increase thecapacityof the feeder from the main panel board to 325A breaker to the bottom of the main service panel, away from the 800 main breaker.
• C. Install a 200A breaker at the PV source connection point on the portion of the feeder toward the subpanel, maintain the capacity of the entire feeder, and move the 200A breaker to the bottom of the main service panel, away from the 800A main breaker.
• D. Install a 200A breaker at the PV source connection point on the portion on the portion of the feeder toward the subpanel and move the 200A breaker to the top of the main service panel, adjust to the 800A main breaker.

Answer: B

 

NEW QUESTION 33
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?

• A. 40.50 in.
• B. 18.25 in.
• C. 12.73 in.
• D. 24.24 in.

Answer: C

 

NEW QUESTION 34
A tap conduct is to be connected to a feeder supplied by both a utility service source and a utility-interactive inverter source. The feeder utility source is a 400A breaker in a service panel, the inverter overcurrent protection device is rated at 100A, and the inverter continuous output current is 72. The tap conductor that is to be installed will be 17 ft. long. It will be located in a raceway and will supply a subpanel with a 50A main breaker.
What is the MINIMUM required ampacity of the tap conductor?

• A. 0
• B. 1
• C. 50A
• D. 400A

Answer: A

 

NEW QUESTION 35
According to the NEC, if the PV system disconnect and the building service disconnect are at different locations, there MUST be a/an:

• A. Means of locking out both disconnects when the PV system inverter is being serviced.
• B. Interface that shuts down the PV system if the utility connection is lost.
• C. Permanent plaque or directory that indicates the location of thePV utility connection.
• D. Permanent plaque or directory that indicates the locations of both disconnects.

Answer: D

 

NEW QUESTION 36
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