최신 PVIP 무료덤프 - NABCEP PV Installation Professional (PVIP) Board Certification

문제1

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 monitored dc-to-dc converters located at each module

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

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

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

정답: B

문제2

A PV system is designed with a 48V battery bank and a 5 kW inverter. The load requires 20 kWh/day, and the system must have 2 days of autonomy with a maximum depth of discharge (DoD) of 50%. What is the minimum battery capacity required in Ah?

A. 417 Ah

B. 1667 Ah

C. 833 Ah

D. 1000 Ah

정답: C

문제3

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. 1.18

C. 1.21

D. 1.15

정답: B

문제4

A PV system includes a 600V DC disconnect with a fault current rating of 10 kA. The available fault current from the inverter is 12 kA. What must be done to comply with NEC 110.10?

A. No action needed; the rating is sufficient

B. Replace the disconnect with a 15 kA-rated unit

C. Reduce the array size to lower fault current

D. Install a current-limiting fuse upstream

정답: B

문제5

When running horizontal 1-1/4 in, electrical metallic tubing (EMT) with compression fittings, what is the MAXIMUM permissible distance between condult supports?

A. 14 ft

B. 20 ft

C. 10 ft

D. 3 ft

정답: C

문제6

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. 580V

B. 560V

C. 600V

D. 540V

정답: A

문제7

A PV system has a 1000V DC array feeding a transformerless inverter. What is the minimum insulation rating for the DC conductors per NEC 690.35?

A. 1000V

B. 600V

C. 1500V

D. 2000V

정답: C

문제8

The AHJ for enforcement of the NEC has which responsibility?

A. Inspecting factory-installed wire and equipment construction methods

B. Making interpretations of the rules and deciding on approval of equipment and material

C. Inspecting installations under the exclusive control of the electric utility

D. Approval equipment installation methods for efficiency, convenience, and adequacy for good service

정답: B

문제9

A 5 kW system has a PR of 0.80 and operates at 4.5 PSH. What is the monthly energy output?

A. 675 kWh

B. 540 kWh

C. 600 kWh

D. 720 kWh

정답: B

문제10

A rooftop PV system is proposed for a commercial building with a membrane roof. The structural engineer specifies a maximum allowable dead load of 5 psf. The PV modules weigh 3 psf, and the racking adds 1.5 psf.
What additional load can be added without exceeding the limit?

A. 1.5 psf

B. 1.0 psf

C. 0.5 psf

D. 0 psf

정답: C

최신 PVIP 무료덤프 - NABCEP PV Installation Professional (PVIP) Board Certification

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