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

1. 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) 400A
B) 50A
C) 163
D) 72

2. 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?

A) Threaded coupling
B) Insulated bushing
C) Sealing locknut
D) Grounding bushing

3. A PV array's output drops by 8% due to shading from 10 AM to 2 PM. If unshaded output is 12 kW, what is the shaded output?

A) 10.0 kW
B) 11.0 kW
C) 10.6 kW
D) 11.2 kW

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

5. A 10 kW array produces 14,000 kWh annually. What is the specific yield in kWh/kW?

A) 1400
B) 1200
C) 1600
D) 1800

Solutions: