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質問 31
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
正解: B
質問 32
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. Conduct stickers
- B. Tagging
- C. Insulation type
- D. Placards
正解: B
質問 33
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. 40.50 in.
- B. 12.73 in.
- C. 18.25 in.
- D. 24.24 in.
正解: B
質問 34
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 main service panel is no longer compliant with NCC 705.12.
- 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 load the protected loads subpanel exceeds the PV system ac rating by 25%.
正解: C
質問 35
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 inverter.
- B. Multiple-string inverter system with data acquisition system located at each dc combiner
- C. Multiple-string inverter system with monitored dc-to-dc converters located at each module
- D. Central inverter with data acquisition system located at the inverter.
正解: B
質問 36
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. Rapid shutdown requirements within 1 ft of the array boundary.
- B. Microinverters can be installed with either polycrystalline or monocrystalline modules, negating the need for rapid shutdown compliance.
- C. 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.
- 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.
正解: B
質問 37
A PV technician is installing a 6.5KWac inverter using a 40A backfed breaker. The single line shows a 200A panelboard with a 200A breaker, but the installer finds that the panelbord actually has a 150A main breaker.
Which of the following is the CORRECT installation option?
- A. Install a 30A backfed circuit breaker.
- B. Complete the installation as noted above.
- C. Replace the 200A panel with a 150A panel.
- D. Change the main circuit breaker to a 200A unit.
正解: B
質問 38
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. 30 in. or the width of the ac disconnect, whichever is greater
- C. 30 in. from all exposed live parts and terminals
- D. 36 in. from the top of the ungrounded inverter terminals
正解: B
質問 39
When doinginitial inspections on a PV system that was installed using racking that is not compliant with UL.2703, an inspector should pay special attention to which electrical attribute?
- A. The equipment grounding conductor must be irreversibly spliced.
- B. Each PV module needs to be bonded to the equipment grounding conductor.
- C. The grounding conductor must be bonded directly to the primary grounding electrode.
- D. Racking needs to be bonded to a supplemental grounding electrode conductor.
正解: B
質問 40
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 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.
- B. 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.
- C. 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.
- D. 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.
正解: B
質問 41
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. Individual nonfused disconnects are required for each set of wiringbecause all of the signals must be isolated from each other.
- B. Each set of twisted pairs must be provided with properly rated fuses that are physically located at the battery.
- C. An appropriately rated and sized of resistive elements for each twisted pair be located at, or very near to, the data logger terminals
- D. The instrument wiring must be large (larger than # 18 AWG) to handle current from each battery and must be a double- insulated type.
正解: B
質問 42
A commercial 600v carport-mounted PV system is installed with rigid running under the parking lot to an inverter pad located at the edge of the parking lot. At what depth below the parkinglot base MUST condult be buried?
- A. 24 in.
- B. 36 in.
- C. 12 in.
- D. 18 in.
正解: A
質問 43
Which of the following MUST be referenced for determining a site's design wind speed?
- A. The jurisdiction's local building code in effect
- B. The module manufacture's design wind speed
- C. The NEC version in effect
- D. The ASHRAE Handbook_fundamentals in effect
正解: D
質問 44
A customer has a 200A service with a 200A rated panel and 200A main breaker located on the street side of the house. There is a 100A breaker located at the opposite end of busbar feeding a 125A subpanel in the backyard. The customer would like to place the inverter the backyard and use the 125 subpanel. Which MAXIMUM inverter(s) output circuit current could be installed?
- A. 42A
- B. 40A
- C. 32A
- D. 30A
正解: B
質問 45
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
正解: C
質問 46
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. Test for current on each source circuit coming into the combiner box.
- B. Remove any surge suppression devices from the circuits.
- C. Test for voltage on the positive out
- D. Open all fuse holders in the combiner box.
正解: D
質問 47
The NEC requires that PV systems installed on dwellings incorporate which of the following components?
- A. Blocking diodes across each module
- B. Dc lightning surge arrestors
- C. A lockable utility disconnect at the point-of-utility interconnection
- D. A dc ground-fault protect device
正解: C
質問 48
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. 4 AWG
- B. 6 AWG
- C. 8 AWG
- D. 10 AWG
正解: A
質問 49
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. 167 ft.
- B. 201 ft.
- C. 98 ft.
- D. 153 ft.
正解: B
質問 50
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 the service entrance panel metal structure
- D. Connecting the water pipe to a gas pipe that is known to be solidly grounded
正解: C
質問 51
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