PVIP by NABCEP Actual Free Exam Questions And Answers

Question 1

An 8 AWG bare copper equipment ground conductor (EGC) is wire tied to the module mounting structure of a commercial rooftop solar array. After a few years of operation, some spots on the EGCbegin to turn a green color and appear to be corroding more significantly that other places. What would the MOST likely cause of the problem?

A. A break in the EGC, leaving the array ungrounded

B. Bypass dlode failures inducing current on the EGC

C. Array racking touching the EGC at multiple points

D. Nyton wire ties in contact with the copper wire

Discussion 0

Correct Answer: C Vote an answer

Question 2

A bifacial PV module has a rated power of 350W on the front side and a bifaciality factor of 70%. If the rear side receives 200 W/m² of irradiance, what is the total power output under STC front-side conditions (1000 W
/m²)?

A. 385W

B. 490W

C. 449W

D. 420W

Discussion 0

Correct Answer: C Vote an answer

Question 3

A PV connection is being made at the center of a 300 ft. long 200 feeder. See the attack diagram. The feeder originates in the upper third of the 800A main service panel (800A main breaker) with a 200A breaker and terminates in a 200A main-lug-only subpanel. The rated output of the PV system inverter is 100A.

Which are the NIMUMUM actions required to achieve an NEC-compliant installation?

A. Install a 325A breaker at the PV source connection point on the portion of the feeder toward the subpanel. Increase the capacity of the feeder from the main panel board to 325A breaker to the bottom of the main service panel, away from the 800 main breaker.

B. Install a 325A at the PV source connection point on the portion of the feeder toward the subpanel, increase the capacity of this portion of the feeder to 325A, add a 200A main breaker to the subpanel, and move the 200A breaker to bottom of the main service panel, away from the 800A main breaker.

C. Install a 200A breaker at the PV source connection point on the portion on the portion of the feeder toward the subpanel and move the 200A breaker to the top of the main service panel, adjust to the 800A main breaker.

D. Install a 200A breaker at the PV source connection point on the portion of the feeder toward the subpanel, maintain the capacity of the entire feeder, and move the 200A breaker to the bottom of the main service panel, away from the 800A main breaker.

Discussion 0

Correct Answer: A Vote an answer

Question 4

A ground-mount PV system is planned for a site with a soil bearing capacity of 2000 psf. The array footing design requires a minimum bearing pressure of 1500 psf. What is the safety factor for this installation?

A. 1.33

B. 2.0

C. 0.75

D. 1.5

Discussion 0

Correct Answer: A Vote an answer

Question 5

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

A. Service entrance conductors

B. Service conductors

C. Feeders

D. Service lateral

Discussion 0

Correct Answer: B Vote an answer

Question 6

On a PV system larger than 100kw, which PV array design will provide the HIGHEST degree of performance monitoring.
Granularity, and ease of troubleshooting performance issues?

A. Multiple-string inverter system with data acquisition system located at each dc combiner

B. Multiple-string inverter system with data acquisition system located at each inverter.

C. Multiple-string inverter system with monitored dc-to-dc converters located at each module

D. Central inverter with data acquisition system located at the inverter.

Discussion 0

Correct Answer: A Vote an answer

Question 7

A PV system requires labeling per NEC 690.56. Which of the following must be posted at the point of interconnection?

A. "Do Not Disconnect Under Load"

B. "Warning: Dual Power Sources"

C. "PV System Disconnect"

D. "Maximum AC Voltage"

Discussion 0

Correct Answer: B Vote an answer

Question 8

A PV system was installed in July 2017 under the 2017 NEC. The system has a string inverter located inside a garage on a wall 10 ft, from the outside wall and 1oft, from the ac load center at the point of utility connection. The PV system has a PV array on the roof. Which of the following represents the PV rapid shutdown system requirement for the controlled PV system conductors associated with this PV array?

A. More than 1 ft, from the VP array and more than 5 ft. In length the building.

B. More than 10ft, from the PV array or more than 5 ft. in length inside the building

C. More than 1 ft, from the PV array or more than 3 ft, from the point of entry of the building.

D. Within the array boundary and more than 3.ft from the point of entry of the building.

Discussion 0

Correct Answer: C Vote an answer

Question 9

A module's Voc is 40V at STC. At -5°C with a coefficient of -0.33%/°C, what is the Voc?

A. 43.0V

B. 44.0V

C. 45.0V

D. 42.0V

Discussion 0

Correct Answer: B Vote an answer

Question 10

A PV system's capacity factor is 18%. The array is 10 kW, and it operates 365 days/year. What is the annual energy output?

A. 18,000 kWh

B. 15,768 kWh

C. 12,264 kWh

D. 21,024 kWh

Discussion 0

Correct Answer: B Vote an answer

NABCEP PV Installation Professional (PVIP) Board Certification - PVIP Exam Practice Test

Contact Us

Useful Links

Latest Updated