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NABCEP PV Installation Professional (PVIP) Board Certification Sample Questions:

1. 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.

2. A PV output circuit requires a disconnecting means per NEC 690.13. Where must it be located?

A) Within 10 feet of the array
B) Within sight of the inverter
C) At the main service panel
D) At the point of interconnection

3. 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 monitored dc-to-dc converters located at each module
C) Central inverter with data acquisition system located at the inverter.
D) Multiple-string inverter system with data acquisition system located at each dc combiner

4. A system's specific yield is 1500 kWh/kW. If the array is 8 kW, what is the annual output?

A) 14,000 kWh
B) 10,000 kWh
C) 16,000 kWh
D) 12,000 kWh

5. What is the maximum allowable voltage drop for a PV source circuit conductor run of 100 feet, using 10 AWG copper wire, if the system operates at 48V DC and the design specifies a 2% voltage drop?

A) 1.44V
B) 0.48V
C) 0.96V
D) 1.92V

Solutions: