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

1. A grid-tied PV system uses a transformerless inverter with a maximum DC input of 1000V. The array consists of 20 modules, each with a Voc of 45V. What is the NEC 690.7 correction factor for a low temperature of -15° C if the temperature coefficient is -0.30%/°C?

A) 1.12
B) 1.21
C) 1.15
D) 1.18

2. Which circuits are on the utility side of a service point?

A) Service entrance conductors
B) Service lateral
C) Service conductors
D) Feeders

3. 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) Field-applied hazard markings must be installed, and access to the supply station is to be restricted by fencing or other adequate means.
C) Access to remote isolating equipment for servicing is allowed for individual other than qualified persons when the equipment is enclosed within a secure structure.
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.

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

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

5. A PV system operates at 800V DC. What is the minimum distance for unqualified personnel per NFPA 70E restricted approach boundary?

A) 7 feet
B) 10 feet
C) 1 foot
D) 3 feet

Solutions: