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Penetration testers simulate PVIP exam PDF
NEW QUESTION 10
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 11
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 12
Which of the following is an NEC-indicate means to identify PV source and output circuits at accessible points of termination connection, and splices?
- A. Insulation type
- B. Placards
- C. Tagging
- D. Conduct stickers
Answer: C
NEW QUESTION 13
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. Install source circuit fuses, verify that all equipment-grounding conductors are secure, and measure ac line voltage.
- B. Perform visual inspection, check polarity and measure open-circuit voltage.
- C. Perform visual inspection, install source circuit fuses, and measure open-circuit voltage.
- D. Perform visual inspection, install source circuit fuses, and measure open-circuit current.
Answer: B
NEW QUESTION 14
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 15
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 16
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 17
A technician has been called to a scale due to a low-performing array. The technician will perform tests in the
24-source circuit combiner box. After putting on the correct PPE and turning off and performing lock.tagout of the inverted and combiner disconnect. Which is the next step to safely begin electrical testing in the combiner box?
- A. Open all fuse holders in the combiner box.
- B. Test for current on each source circuit coming into the combiner box.
- C. Test for voltage on the positive out
- D. Remove any surge suppression devices from the circuits.
Answer: A
NEW QUESTION 18
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 19
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 20
A project is using a PV module with a 25-38dc maximum power voltage range and a single input inverter with an operating windows of 250vdc-450dc. The dwelling the system is to be installed on has a 5:12 roof with a southeastem face that can accommodate 14 modules and southwestern face that can accommodate 10 modules.
What is the MAXIMUM number of modules that can be installed for proper inverter maximum power point tracking?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A
NEW QUESTION 21
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 22
An installer troubleshooting a ground-mounted array finds It to be performing as expected most of the time, but a ground-fault error is indicated on hot days. The inverter is in a shaded location. Which of the following should theinstaller check for FIRST when troubleshooting this array?
- A. Pinched module wiring
- B. Loose module connections
- C. High voltage
- D. Intermittent ground connections
Answer: A
NEW QUESTION 23
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 24
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 25
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. Determine possible sources electrical supply an avoid exposure to energized conductors or parts.
- B. Verify that disconnecting device blades are closed and test conductors using an adequately rated detector.
- C. Mount inverters on nonconductive supports and temporarily ground one dc circuit conductor.
- D. Apply lockout/tagout devices and install a listed isolation transformer.
Answer: A
NEW QUESTION 26
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 27
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 28
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 29
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 30
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 31
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 32
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. String #3 has an open connection and is not contributing any voltage.
- D. There is lower module mismatch in string #3 than in string #1 and #2.
Answer: A
NEW QUESTION 33
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 34
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