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

1. A PV array is installed at a site with an annual average temperature of 25°C and a maximum recorded temperature of 45°C. The module Voc is 50V at STC, with a temperature coefficient of -0.32%/°C. What is the maximum string voltage at the coldest expected temperature of -10°C?

A) 560V
B) 580V
C) 600V
D) 540V

2. Which is a requirement for designated battery rooms?

A) must be equipped with panic hardware and open m the direction of egress.
B) Gas pipe equipment must be constructed and installed for a Hazardous Class I location.
C) Battery cabinets, racks, or trays must have a minimum clearance of 12 in. from any wall.
D) illumination shall be provided by lighting outlets controlled by automated means only.

3. A worker is installing modules on a roof 20 feet above grade. What OSHA fall protection is required?

A) Guardrails only
B) Safety net system
C) Personal fall arrest system
D) Any of the above

4. A 20 kW array has a measured output of 16 kW at 800 W/m² irradiance. What is the performance loss due to irradiance?

A) 20%
B) 25%
C) 10%
D) 30%

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

Solutions: