Get 100% Passing Success With True PVIP Exam! [Oct-2021]
NABCEP PVIP PDF Questions - Exceptional Practice To PV Installation Professional (PVIP) Board Certification
NEW QUESTION 27
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. 30A
- B. 42A
- C. 32A
- D. 40A
Answer: D
NEW QUESTION 28
Insulation resistance testing is being performed on the conductors of a 3-year-old PV system. With a constant high test voltage being applied to a dc conductor, the test results in a high resistance reading. Which does this finding indicate?
- A. The conductor insulation is functioning as intended.
- B. Soling of modules has reduced the efficiency of the system.
- C. Typical module degradation has lowered the output of the system's strings.
- D. Wiring insulation has degraded and is resulting in leakage.
Answer: A
NEW QUESTION 29
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
Answer: C
NEW QUESTION 30
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 31
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 32
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 33
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 34
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. Intermittent ground connections
- C. High voltage
- D. Loose module connections
Answer: A
NEW QUESTION 35
Which is a requirement for designated battery rooms?
- A. Gas pipe equipment must be constructed and installed for a Hazardous Class I location.
- B. illumination shall be provided by lightingoutlets controlled by automated means only.
- C. must be equipped withpanic hardware and open m the directionof egress.
- D. Battery cabinets, racks, or trays must have a minimum clearance of 12 in. from any wall.
Answer: C
NEW QUESTION 36
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 37
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. Phase-to-phase power imbalances
- B. High-leg transformer configuration
- C. Supply-side ground fault
- D. Missing ground in the transformer
Answer: B
NEW QUESTION 38
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 39
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. #12 aluminum
- B. #6 aluminum
- C. #10 copper
- D. #8 copper
Answer: C
NEW QUESTION 40
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: D
NEW QUESTION 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. The instrument wiring must be large (larger than # 18 AWG) to handle current from each battery and must be a double- insulated type.
- B. An appropriately rated and sized of resistive elements for each twisted pair be located at, or very near to, the data logger terminals
- C. Individual nonfused disconnects are required for each set of wiringbecause all of the signals must be isolated from each other.
- D. Each set of twisted pairs must be provided with properly rated fuses that are physically located at the battery.
Answer: D
NEW QUESTION 42
A ground-mounted PV system operating with an open-critical voltage of 550V is in a public park. Which installation procedure will meet NEC requirements for protecting the public from potential electric shock?
- A. Install PV modules with plastic, insulating the frames, and connect to a grounding electrode at the array.
- B. Ground the PV module frames, but not the mounting racks, to local grounding electrodes.
- C. Mount the PV modules on a one-axis (north-south) tracker, with supporting structures listed to UL 2703.
- D. Install a physical barrier on the back of the PV modules that prevent that prevents the conductors from being touched.
Answer: D
NEW QUESTION 43
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