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NABCEP PVIP Exam Syllabus Topics:

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

1. A string inverter fails to start in the morning. The DC input voltage is 200V, below the minimum start voltage of 250V. What should be checked first?

A) Module temperature
B) AC breaker position
C) String sizing
D) Inverter firmware

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

A) 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.
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) All fencing and associated gates must have ac and dc current and voltage exposure labvels and must be electrically isolated from the solar facility.
D) Access to remote isolating equipment for servicing is allowed for individual other than qualified persons when the equipment is enclosed within a secure structure.

3. 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) 14
B) 18
C) 24
D) 20

4. When commissioning a PV system, which test is most critical to verify proper operation of the array before connecting to the inverter?

A) Open-circuit voltage test
B) Short-circuit current test
C) Insulation resistance test
D) Ground-fault detection test

5. A PV module shows burn marks near the junction box. What is the most likely cause?

A) Lightning strike
B) Ground fault
C) Overcurrent condition
D) Loose connection

Solutions: