NABCEP PVIP Practice Verified Answers - Pass Your Exams For Sure! [2021]
Valid Way To Pass NABCEP Board's PVIP Exam
NEW QUESTION 21
Inspection of a new PV installation shows that the dwelling uses a galvanized water pipe for its grounding electrode and that the PV system now shares the connection. Which of the following is an acceptable supplemental electrode method to ensure the integrity of having a grounding electrode?
- A. Connection the service panel to a copper-clad steel ground rod near the panel
- B. Connecting the service panel to an auxiliary ground used by a lightning protection system
- C. Connecting the water pipe to a gas pipe that is known to be solidly grounded
- D. Connecting the water pipe to the service entrance panel metal structure
Answer: D
NEW QUESTION 22
According to the NEC, where on a residential PV system MUST the labeling describing the type of rapid shutdown be located?
- A. At point on the residence designated by the AKJ and fire marshal
- B. A close as practicable to the PV array requiring rapid shutdown
- C. On or no more than 1 m (3. 3 ft) from the service disconnecting meant
- D. On the rapid shutdown initiation device.
Answer: D
NEW QUESTION 23
Which insulation color is allowed for a current-carrying roottop dc conductor on a functionally grounded 6kw PV system?
- A. Green
- B. Red
- C. Green/yellow
- D. White
Answer: B
NEW QUESTION 24
When running horizontal 1-1/4 in, electrical metallic tubing (EMT) with compression fittings, what is the MAXIMUM permissible distance between condult supports?
- A. 20 ft
- B. 10 ft
- C. 14 ft
- D. 3 ft
Answer: B
NEW QUESTION 25
A 1. 100 ft, 2 ranch home with cathedralcallingshas a 14 ft. x 41 ft. 8 in , south-facing , composite shingle roof. An engineer has determined that the home's 2 in, x 6 in. on-center roof rafters are strong enough to gold a solar electric system. The system will have 62.25 in. x 32.50 in. modules with a 1-in gap between modules and a standard twin-rillmounting system number of modules that can fit on the roof on under these conditions?
- A. 30 modules in portrait
- B. 40 modules in landscape
- C. 28 modules in portrait
- D. 35 modules in landscape
Answer: D
NEW QUESTION 26
Which of the following should a PV installer do during dc insulation resistance testing?
- A. Remove surge suppression equipment from the circuit being tested.
- B. Close ac and dc disconnects and have the system running for at least 5 minutes before testing.
- C. Wait until is raining and all wiring is damp to conduct the test.
- D. Connect the megohmmeters's negative terminal to the dc circuit insulation
Answer: D
NEW QUESTION 27
The point-of-utility connection of a residential utility-interactive PV system is in the main distribution panel. If the busbars of the main distribution panel are rated at 200A, and if the distribution panel has a 200A main breaker, the rated output current of the inverter cannot exceed.
- A. 40A
- B. 200A
- C. 32A
- D. 24A
Answer: C
NEW QUESTION 28
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. 9, 600W
- B. 21, 600W
- C. 7, 689W
- D. 17, 280W
Answer: D
NEW QUESTION 29
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. Ungrounded conductors are conducing current event the ground-fault device has activated.
- B. Insulation has become an electrical conductor since it has changed its composition.
- C. Cracked insulation has allowed water intrusion that resulted in oxidation of the copper conductors.
- D. Short-circuit current is present at the PV source-circuit terminals of the disconnect device because of electrical leakage.
Answer: B
NEW QUESTION 30
Which of the following is the required MINIMUM width of the working space In front of ac disconnect equipment?
- A. 36 in. from the right and left edges of the inverter
- B. 36 in. from the top of the ungrounded inverter terminals
- C. 30 in. from all exposed live parts and terminals
- D. 30 in. or the width of the ac disconnect, whichever is greater
Answer: D
NEW QUESTION 31
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. Metal frame of a building or structure in direct with the earth for 10 ft. or more.
- B. Metal underground water pipe in direct contact with the earth for 10 ft. or more.
- C. Concrete-encased 4 AWG copper conductor at least 20 ft, in length
- D. Aluminum structural member in direct contact with the earth for 10ft, or more
Answer: D
NEW QUESTION 32
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?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
NEW QUESTION 33
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: B
NEW QUESTION 34
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?
- A. #6 aluminum
- B. #10 copper
- C. #12 aluminum
- D. #8 copper
Answer: B
NEW QUESTION 35
A PV system is located at 41 N latitude. The sun angle is 23 on December 21 at solar noon. Assuming that the
65 ft tree is directly south of the PV array and will grow 20 ft. over the life of the PV system, what is the MNIMUM distance the tree to the button of the prevent shading?
- A. 98 ft.
- B. 153 ft.
- C. 167 ft.
- D. 201 ft.
Answer: D
NEW QUESTION 36
A grid-interactive PV system with battery backup is being installed with a ground-mounted PV array located
200 ft, from the inverter and batteries. The dc PV output circuit has overcuit has overcurrent protection rated from 30A. To reduce voltage drop between the array and batteries, the output circuit wire size was determined to be 6 AWG. The fused dc disconnect between the inverted and batteries is rated for 300A. What is the required size of the equipment grounding conductor between the metal battery case and the inverter?
- A. 8 AWG
- B. 10 AWG
- C. 6 AWG
- D. 4 AWG
Answer: D
NEW QUESTION 37
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. 50A
- B. 400A
- C. 0
- D. 1
Answer: D
NEW QUESTION 38
Thermal imaging infrared cameras can be used to help find which of the following system operational issues?
- A. Battery state of charge in a multimode system
- B. Loose PV input circuit terminations in a combiner box
- C. Intensity of solar insolation to determine power output
- D. Blind spot fault in a source circuit
Answer: D
NEW QUESTION 39
A connector not listed to be used in a concealed location and being used as a disconnect for PV equipment shall comply with which of the following?
- A. The grounding member shall be last to make and first to break contact with the mating connector
- B. The connector shall be installed so as to guard against inadvertent with live parts by persons.
- C. The connector shall have a non-polarized configuration.
- D. The grounding member shall be interconnectchangeable with receptacles in other electrical systems.
Answer: B
NEW QUESTION 40
An 8 AWG bare copper equipment ground conductor (EGC) is wire tied to the module mounting structure of a commercial rooftop solararray. After a few years of operation, some spots on the EGC begin to turn a green color and appear to be corroding more significantly that other places. What would the MOST likely cause of the problem?
- A. Nyton wire ties in contact with the copper wire
- B. A break in the EGC, leaving the array ungrounded
- C. Array racking touching the EGC at multiple points
- D. Bypass dlode failures inducing current on the EGC
Answer: C
NEW QUESTION 41
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. Supplemental grounding electrode located 5 ft, away.
- B. Supplemental copper plated steel grounding electrode located 8 ft, away.
- C. Buried water piping system using 40 ft. of 2 in. PVC piping located 10 ft awat.
- D. Supplement 1/4 in, in thick aluminumplate electrode buried 30 in. down and located 7 ft, away.
Answer: B
NEW QUESTION 42
A residential PV system uses two 120.240Vac utility-interactive inverters with a sealed lead-acid battery energy backup for protected loads. The MOST important protected load consideration when operating in the backup mode is that:
- A. The stand-alone system configuration can adequately supply current to all protected load branch circuit.
- B. The peak current from the sealed lead- acid batteries must not exceed peak demand currents.
- C. All protected loads are connected in multiwire branch circuits.
- D. The protected loads must have automatic restart function.
Answer: C
NEW QUESTION 43
A PV system equipped with rapid shutdown requires a label stating ''RAPID SHUTDOWN SWITCH FOR SOLAR PV SYSTEM''.
Which is the BEST description of where this label is required?
- A. On or within 3 ft. of the ac disconnect
- B. On or within 3 ft. of the ac disconnect
- C. On or within 3 ft. of the ac disconnect
- D. On or within 3 ft. of the ac disconnect
Answer: D
NEW QUESTION 44
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