Latest Nov-2021 NABCEP PVIP Dumps Updated 72 Questions
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NEW QUESTION 25
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. 200A
- B. 32A
- C. 40A
- D. 24A
Answer: B
NEW QUESTION 26
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. 40 modules in landscape
- B. 35 modules in landscape
- C. 28 modules in portrait
- D. 30 modules in portrait
Answer: B
NEW QUESTION 27
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: C
NEW QUESTION 28
Which temperature coefficient is used in the calculation to verify energy production of a PV system?
A)
B)
C)
D)
- A. Option
- B. Option
- C. Option
- D. Option
Answer: A
NEW QUESTION 29
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. Intensity of solar insolation to determine power output
- C. Blind spot fault in a source circuit
- D. Loose PV input circuit terminations in a combiner box
Answer: C
NEW QUESTION 30
A bank of batteries with capability of supplying 250A and a maximum voltage of 325V is housed in a concrete structure in a very humid location. There is service access alsie between rows of batteries. What is the REQUIRED safety distance between the rows of batteries.
- A. 3-1/2If the building is equipped with a dehumidifier and the batteries are on insulting surfaces
- B. 4 ftWhether or not the building is equipped with a dehumidifier or the batteries are insulting surfaces
- C. 3 ft. when insulted conducted conductors are used between terminals.
- D. 6 ft.When the floor is insulated and no dehumidifier is installed.
Answer: C
NEW QUESTION 31
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. 153 ft.
- B. 201 ft.
- C. 98 ft.
- D. 167 ft.
Answer: B
NEW QUESTION 32
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. 12.73 in.
- B. 24.24 in.
- C. 40.50 in.
- D. 18.25 in.
Answer: A
NEW QUESTION 33
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. 0
- C. 400A
- D. 1
Answer: B
NEW QUESTION 34
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 grounding member shall be interconnectchangeable with receptacles in other electrical systems.
- C. The connector shall have a non-polarized configuration.
- D. The connector shall be installed so as to guard against inadvertent with live parts by persons.
Answer: D
NEW QUESTION 35
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. #8 copper
- B. #12 aluminum
- C. #6 aluminum
- D. #10 copper
Answer: D
NEW QUESTION 36
A grid-connected PV system on a dwelling is producing 30% less power than expected. The conductors from threes strings of modules enter into a 3-pole fused dc disconnect, and each ungrounded conductor is connected to a separate pole. On the inverter side of the switch terminals, the three strings are combined. The dc disconnect switch is opened. The voltages on the array side of theswitchare 440 on string #1, 444V on string
#2, and 0V on string #3. The dc disconnect is then closed and the inverter resumes operating, still producing about 30% less power than expected. A clamp-on ammeter is used to measure the dc current of each string of each string of modules where they enter the rooftop junction box. The operating currents of each string are
3.9A for string #1, 3 85A for string #2, and 4.3 A for string #3. What is the MOST likely with the system?
- A. Positive and negative output conductors of string #3 are faulted together.
- B. A ground fault is causing the current from strings #1 and #2 to flow into string #3.
- C. There is lower module mismatch in string #3 than in string #1 and #2.
- D. String #3 has an open connection and is not contributing any voltage.
Answer: A
NEW QUESTION 37
When installing an ungrounded PV system with an open-circuit voltage of 450Vdc and a maximum voltage of
3000Vdc which procedures should be followed to establish an electrically safe condition?
- A. Apply lockout/tagout devices and install a listed isolation transformer.
- B. Determine possible sources electrical supply an avoid exposure to energized conductors or parts.
- C. Verify that disconnecting device blades are closed and test conductors using an adequately rated detector.
- D. Mount inverters on nonconductive supports and temporarily ground one dc circuit conductor.
Answer: B
NEW QUESTION 38
Which circuits are on the utility side of a service point?
- A. Feeders
- B. Service entrance conductors
- C. Service conductors
- D. Service lateral
Answer: C
NEW QUESTION 39
Which load path connections need to be analyzed when determining live and dead loads on a PV array system installed directly to a metal seam roof?
- A. Module to rail, rail to roof sheathing, roof sheathing to wall, wall to base plate/foundation system
- B. Module to rail to metal seam roof, metal seam roof to top plate system
- C. Module to rail to metal seam roof, metal seam roof sheathing/rather system.
- D. Rail to metal seam roof, metal seam roof to top plate, top plate to wall system
Answer: C
NEW QUESTION 40
Which insulation color is allowed for a current-carrying roottop dc conductor on a functionally grounded 6kw PV system?
- A. White
- B. Green
- C. Red
- D. Green/yellow
Answer: C
NEW QUESTION 41
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 42
Which of the following is the required MINIMUM width of the working space In front of ac disconnect equipment?
- A. 36 in. from the top of the ungrounded inverter terminals
- B. 36 in. from the right and left edges of the inverter
- 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 43
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