Best Quality PVIP Exam Questions NABCEP Test To Gain Brilliante Result!
Preparations of PVIP Exam 2021 NABCEP Board Unlimited 72 Questions
NEW QUESTION 43
Which circuits are on the utility side of a service point?
- A. Service entrance conductors
- B. Service lateral
- C. Feeders
- D. Service conductors
Answer: D
NEW QUESTION 44
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. 28 modules in portrait
- C. 30 modules in portrait
- D. 35 modules in landscape
Answer: D
NEW QUESTION 45
Which of the following tests measures axial uplift whenperforming load testing of driven-pile foundation members
- A. Resistance to horizontal movement
- B. Resistance to twisting
- C. Resistance to withdraw (pull-out) force
- D. Resistance to downward (Sinking force
Answer: C
NEW QUESTION 46
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: D
NEW QUESTION 47
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. 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.
- B. Microinverters can be installed with either polycrystalline or monocrystalline modules, negating the need for rapid shutdown compliance.
- C. Rapid shutdown requirements within 1 ft of the array boundary.
- D. 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.
Answer: B
NEW QUESTION 48
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. Dispatch the technician to the site t investigate the low performance issue in person.
- C. Report the low performance to theinverter manufacturer and request that a technical be sent to the site for a warranty claim.
- D. Review power output and weather conditions via the monitoring portal, and review local weather reports.
Answer: D
NEW QUESTION 49
According to the NEC, where on a residential PV system MUST the labeling describing the type of rapid shutdown be located?
- A. A close as practicable to the PV array requiring rapid shutdown
- B. On the rapid shutdown initiation device.
- C. At point on the residence designated by the AKJ and fire marshal
- D. On or no more than 1 m (3. 3 ft) from the service disconnecting meant
Answer: B
NEW QUESTION 50
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 protected loads must have automatic restart function.
- 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 stand-alone system configuration can adequately supply current to all protected load branch circuit.
Answer: C
NEW QUESTION 51
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 52
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 53
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. 10 AWG
- B. 6 AWG
- C. 4 AWG
- D. 8 AWG
Answer: C
NEW QUESTION 54
An installer is using 1/2 in lag boits to secure roof-monitoring hardware to rafters through a roof deck. Which of the following should the installer predrill?
- A. A pilot hole one-half the length of the bolt
- B. A 5/16 in pilot hole through the roof into the rafter
- C. A 1/8 in, pilot hole through the roof into the rafter
- D. A pilot hole one-fourth the length of the bolt
Answer: B
NEW QUESTION 55
Thermal imaging infrared cameras can be used to help find which of the following system operational issues?
- A. Blind spot fault in a source circuit
- B. Battery state of charge in a multimode system
- C. Loose PV input circuit terminations in a combiner box
- D. Intensity of solar insolation to determine power output
Answer: A
NEW QUESTION 56
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?
- A. Approval by the local AHJ for meeting safely regulations
- B. Tested and approval by the distributor of the equipment
- C. Certified via the state material handling safely statutes
- D. Certified in writing by the manufacturer or an NRTL
Answer: A
NEW QUESTION 57
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. Install source circuit fuses, verify that all equipment-grounding conductors are secure, and measure ac line voltage.
- C. Perform visual inspection, install source circuit fuses, and measure open-circuit current.
- D. Perform visual inspection, check polarity and measure open-circuit voltage.
Answer: D
NEW QUESTION 58
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 59
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. Ungrounded conductors are conducing current event the ground-fault device has activated.
- D. Cracked insulation has allowed water intrusion that resulted in oxidation of the copper conductors.
Answer: A
NEW QUESTION 60
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. 201 ft.
- D. 167 ft.
Answer: C
NEW QUESTION 61
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. String #3 has an open connection and is not contributing any voltage.
- C. There is lower module mismatch in string #3 than in string #1 and #2.
- D. A ground fault is causing the current from strings #1 and #2 to flow into string #3.
Answer: A
NEW QUESTION 62
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. Grounding bushing
- B. Insulated bushing
- C. Threaded coupling
- D. Sealing locknut
Answer: A
NEW QUESTION 63
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