Nabcep Prep / PV Mastery Final Exam

Question 1

A PV array receives an average of 900 W/m2 for 5 hours a day. What is the total amount of solar energy the PV array receives during a 7-day period?

Answer 1

45. 00 kWh/m2
46. 15 kWh/m2
47. 50 kWh/m2
48. 50 kWh/m2

Question 2

What is the initial necessary step to ensure code compliance for a PV system installation?

Answer 2

Perform a shading analysis

Analyze the client’s electric usage

Question 3

At what time of year during solar noon will an object cast the longest shadow in the Northern Hemisphere?

Answer 3

⦁ June 21st, Summer Solstice
⦁ March 21st, Spring Equinox
⦁ December 21st, Winter Solstice
⦁ September 21st, Fall Equinox

Question 4

Rooftop mounting systems transfer the weight of the PV system and its associated wind, snow and seismic loads to the roof’s tissues or rafters through which component?

Answer 4

26 watts
260 watts
120 watts
144 watts

Question 5

The grounding electrode conductor of a PV system should be what color?

Answer 5

Black
Green
White
Red

Question 6

What is the primary power source for a grid tied inverter?

Answer 6

The PV array
The battery bank
The main service panel
The utility

Question 7

What parameter on a PV module’s IV curve is used to calculate the minimum number of modules to be configured in a series string?

Answer 7

Imp
VMP
Isc
Voc

Question 8

What is the reason for grounding PV systems?

Answer 8

To establish a connection to the earth
Provides a path for fault currents and lighting induced surges to dissipate safely
It improves power output from the array
It establishes resistance levels for the PV system