PVIP Practice Exam Questions and Answers

Which of the following tests measures axial uplift whenperforming load testing of driven-pile foundation members

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 bank of batteries with capability of supplying 250A and a maximum voltage of 325V is housed in a concrete structure in a very humid location. There is service access alsie between rows of batteries. What is the REQUIRED safety distance between the rows of batteries.

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?

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 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?

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?

Which of the following is an NEC requirement regarding access for large-scale PV electric power production facilities?

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 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 30

A.  

G.  

A.