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

1. 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) Grounding bushing
B) Threaded coupling
C) Insulated bushing
D) Sealing locknut

2. Thermal imaging infrared cameras can be used to help find which of the following system operational issues?

A) Intensity of solar insolation to determine power output
B) Battery state of charge in a multimode system
C) Blind spot fault in a source circuit
D) Loose PV input circuit terminations in a combiner box

3. A 5 kW PV system has a derate factor of 0.82. The site receives 5.5 PSH daily. What is the expected daily AC energy output?

A) 25.0 kWh
B) 22.55 kWh
C) 27.5 kWh
D) 20.5 kWh

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

A) All fencing and associated gates must have ac and dc current and voltage exposure labvels and must be electrically isolated from the solar facility.
B) Access to remote isolating equipment for servicing is allowed for individual other than qualified persons when the equipment is enclosed within a secure structure.
C) Field-applied hazard markings must be installed, and access to the supply station is to be restricted by fencing or other adequate means.
D) Arc flash warning labels must be field-applied by the installer at all access points for qualified persons and at the point of the utility interconnection directory.

5. With all other environmental parameters being the same, which would be the expected reduction in KM performance of a PV system after an irradiance drop from 810w/m2 to 740w/m2?

A) 7.4%
B) 8.6%
C) 9.5%
D) 10.2%

Solutions: