PVIP試験無料問題集（162題）「NABCEP PV Installation Professional (PVIP) Board Certification 認定」

出題：1

Per NEC 690.4, who is qualified to install a PV system?

A. A journeyman with PV experience

B. Anyone with basic electrical knowledge

C. A licensed electrician or supervised trainee

D. Only a NABCEP-certified installer

正解：C 解答を投票する

出題：2

During commissioning, a PV system's measured Voc is 10% lower than expected. What is the most likely cause?

A. Inverter malfunction

B. Shading on one module

C. Open circuit in a string

D. High ambient temperature

正解：C 解答を投票する

出題：3

Inspection of a new PV installation shows that the dwelling uses a galvanized water pipe for its grounding electrode and that the PV system now shares the connection. Which of the following is an acceptable supplemental electrode method to ensure the integrity of having a grounding electrode?

A. Connection the service panel to a copper-clad steel ground rod near the panel

B. Connecting the water pipe to the service entrance panel metal structure

C. Connecting the water pipe to a gas pipe that is known to be solidly grounded

D. Connecting the service panel to an auxiliary ground used by a lightning protection system

正解：B 解答を投票する

出題：4

A 5 kW system has a daily output of 20 kWh at 5 PSH. What is the total derate factor?

A. 0.85

B. 0.80

C. 0.90

D. 0.75

正解：B 解答を投票する

出題：5

A 10 kW PV system produces 8 kW AC under STC. After one year, output drops to 7.2 kW. What is the most likely maintenance issue?

A. Soiling on modules

B. Loose connections

C. Inverter inefficiency

D. Module degradation

正解：A 解答を投票する

出題：6

A AWG THWN-2 PV output conductors from two PV arrays are run in the same 3 in, conduit to their respective functionally grounded inverters in the building. The three PV source circuits are each protected by a 15A fuse in the combiner box at the array. The conduit, which is strapped directly to the roof, is exposed to design temperatures of 140' F (60' C) during its 30 ft.
Exposed run. What is the MAXIMUM current carrying capability value of the PV output conductors?

A. 42A

B. 61A

C. 54A

D. 34A

正解：D 解答を投票する

出題：7

A 10 kW PV array uses 300W modules with a Voc of 40V and an Isc of 9A. The inverter has a maximum DC input of 600V and 25A. What is the maximum number of modules that can be connected in a single string?

A. 14

B. 16

C. 12

D. 15

正解：D 解答を投票する

出題：8

An installer troubleshooting a ground-mounted array finds It to be performing as expected most of the time, but a ground-fault error is indicated on hot days. The inverter is in a shaded location. Which of the following should the installer check for FIRST when troubleshooting this array?

A. Intermittent ground connections

B. Loose module connections

C. High voltage

D. Pinched module wiring

正解：D 解答を投票する

出題：9

A PV array with 58 in. X 38 in modules in portrait orientation is to be mounted at a 35 tiit angle on a shingle roof that has a 5:12 pitch. Assuming the support leg is attached to the top of the modules and is perpendicular to its face, what is the length of the support leg for the modules?

A. 40.50 in.

B. 18.25 in.

C. 24.24 in.

D. 12.73 in.

正解：D 解答を投票する

出題：10

A PV module has a temperature coefficient of power of -0.4%/°C and a rated power of 300W at STC (25°C).
What is the expected power output if the module temperature rises to 55°C?

A. 300W

B. 288W

C. 264W

D. 276W

正解：C 解答を投票する

PVIP試験無料問題集「NABCEP PV Installation Professional (PVIP) Board Certification 認定」