[2021] Pass PVIP Exam - Real Questions & Answers
PVIP Exam Questions Get Updated [2021] with Correct Answers
NEW QUESTION 18
An installer was asked to provide a means to measure the voltage of each battery in a system. The bank is located 50 ft.
From the data logger. The installer will be using shielded. Twisted pairs of instrumentation wiring, all run in the bundle a conduct.
The signals are connected to isolated and ungrounded inputs at a data logger. Which safely precaution is MOST needed to protect the instrumentation wiring?
- A. An appropriately rated and sized of resistive elements for each twisted pair be located at, or very near to, the data logger terminals
- B. Individual nonfused disconnects are required for each set of wiringbecause all of the signals must be isolated from each other.
- C. Each set of twisted pairs must be provided with properly rated fuses that are physically located at the battery.
- D. The instrument wiring must be large (larger than # 18 AWG) to handle current from each battery and must be a double- insulated type.
Answer: C
NEW QUESTION 19
While surveying a potential three-phase project, an installer measures the voltage at the point of utility interconnection. The results are as follows:
* Phase to phase: 240V
* Phase A neutral: 120V
* Phase B neutral: 208V
* Phase C neutral: 120V
Which is a likely cause of these reading?
- A. Supply-side ground fault
- B. Missing ground in the transformer
- C. Phase-to-phase power imbalances
- D. High-leg transformer configuration
Answer: D
NEW QUESTION 20
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. There is an intermittent inverter failure that is causing production to be lower than expected and the inverter should be repaired.
- D. The system has experienced above-average degradation and a module warranty claim should be explored.
Answer: B
NEW QUESTION 21
A7KW/ 14 KWh multimode systemhas been installed at a residence, ac-couple with the customer's existing
6.7kwh ac PV system. The system providers uninterrupted power to a protect loads subpanel, which is connected to a refrigerator, Microwave, 1.0 ton are conditioner, three lightning circuit, and the 6.7kwac PV system. One month later, the homeowner moves additional circuits to the protected loads subpanel, substantially increasing the loads. Why would this cause, the backfed interconnection breaker in the main service panel to trip?
- A. The load the protected loads subpanel exceeds the PV system ac rating by 25%.
- B. The total load exceeds the system's energy storage capacity of 14kWh.
- C. The toad exceeds the capacity of the interconnection breaker.
- D. The main service panel is no longer compliant with NCC 705.12.
Answer: C
NEW QUESTION 22
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 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.
- B. 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.
- 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 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.
Answer: D
NEW QUESTION 23
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 24
Which of the following tests measures axial uplift whenperforming load testing of driven-pile foundation members
- A. Resistance to twisting
- B. Resistance to horizontal movement
- C. Resistance to downward (Sinking force
- D. Resistance to withdraw (pull-out) force
Answer: D
NEW QUESTION 25
A PV system was installed in July 2017 under the 2017 NEC. The system has a string inverter located inside a garage on a wall 10 ft, from the outside wall and 1oft, from the ac load center at the point of utility connection.
The PV system has a PV array on the roof. Which of the following represents the PV rapid shutdown system requirement for the controlled PV system conductors associated with this PV array?
- A. Within the array boundary and more than 3.ft from the point of entry of the building.
- B. More than 1 ft, from the PV array or more than 3 ft, from the point of entry of the building.
- C. More than 1 ft, from the VP array and more than 5 ft. In length the building.
- D. More than 10ft, from the PV array or more than 5 ft. in length inside the building
Answer: B
NEW QUESTION 26
Most electric service providers require interactive PV equipment to comply with which for interconnection to their distribution grid?
- A. UL 1741
- B. UL 60947-1
- C. UL 2703
- D. UL 16998
Answer: B
NEW QUESTION 27
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 28
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. Review power output and weather conditions via the monitoring portal, and review local weather reports.
- C. Report the low performance to theinverter manufacturer and request that a technical be sent to the site for a warranty claim.
- D. Dispatch the technician to the site t investigate the low performance issue in person.
Answer: B
NEW QUESTION 29
An installer has decided to use 31 in. long. 3.1/2 in diameter conical ground screws as the footings for a
3.840W solar electric system. Access to he is too difficult to pour concrete footings. The soll is classified as sandy loam. The design wind speed is 90 mph with an uplift force of 32 ibs/ft2. What is the MINIMUM number of screw required to resist uplift loads?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
NEW QUESTION 30
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. Certified via the state material handling safely statutes
- B. Approval by the local AHJ for meeting safely regulations
- C. Certified in writing by the manufacturer or an NRTL
- D. Tested and approval by the distributor of the equipment
Answer: B
NEW QUESTION 31
According to the NEC, if the PV system disconnect and the building service disconnect are at different locations, there MUST be a/an:
- A. Interface that shuts down the PV system if the utility connection is lost.
- B. Permanent plaque or directory that indicates the location of thePV utility connection.
- C. Means of locking out both disconnects when the PV system inverter is being serviced.
- D. Permanent plaque or directory that indicates the locations of both disconnects.
Answer: D
NEW QUESTION 32
Which of the following is an NEC requirement regarding access for large-scale PV electric power production facilities?
- A. All fencing and associated gates must have ac and dc current and voltage exposure labvels and must be electrically isolated from the solar facility.
- B. Field-applied hazard markings must be installed, and access to the supply station is to be restricted by fencing or other adequate means.
- C. Access to remote isolating equipment for servicing is allowed for individual other than qualified persons when the equipment is enclosed within a secure structure.
- D. Arc flash warning labels must be field-applied by the installer at all access points for qualified persons and at the point of the utility interconnection directory.
Answer: B
NEW QUESTION 33
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. Central inverter with data acquisition system located at the inverter.
- C. Multiple-string inverter system with data acquisition system located at each inverter.
- D. Multiple-string inverter system with monitored dc-to-dc converters located at each module
Answer: A
NEW QUESTION 34
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 35
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 36
The AHJ for enforcement of the NEC has which responsibility?
- A. Inspecting factory-installed wire and equipment construction methods
- B. Approval equipment installation methods for efficiency, convenience, and adequacy for good service
- C. Making interpretations of the rules and deciding on approval of equipment and material
- D. Inspecting installations under the exclusive control of the electric utility
Answer: C
NEW QUESTION 37
Which circuits are on the utility side of a service point?
- A. Service lateral
- B. Feeders
- C. Service entrance conductors
- D. Service conductors
Answer: D
NEW QUESTION 38
The NEC requires that PV systems installed on dwellings incorporate which of the following components?
- A. Dc lightning surge arrestors
- B. Blocking diodes across each module
- C. A dc ground-fault protect device
- D. A lockable utility disconnect at the point-of-utility interconnection
Answer: D
NEW QUESTION 39
Which of the following voltages should be included on the dc disconnected label to indicate MAXIMUM system voltage?
- A. Non-temperature-corrected V
- B. Source circuit V
- C. 600 V
- D. Temperature-corrected V
Answer: D
NEW QUESTION 40
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