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. Inverter inefficiency
C. Loose connections
D. Module degradation
正解:A
質問 2:
A PV array is installed on a sloped roof with a 6:12 pitch. What is the minimum fastener pullout strength required if the uplift force is 200 lbs per attachment point?
A. 200 lbs
B. 300 lbs
C. 600 lbs
D. 400 lbs
正解:D
質問 3:
A ground-mount array uses driven piles with a lateral load capacity of 500 lbs. The wind load calculation yields a lateral force of 600 lbs per pile. What must be done?
A. Any of the above
B. Add additional piles
C. Use a different foundation type
D. Increase pile depth
正解:A
質問 4:
A 10 kW system has a total derate factor of 0.85 and operates at 5 PSH. What is the daily output in summer with 10% soiling loss?
A. 38.25 kWh
B. 36.0 kWh
C. 42.5 kWh
D. 47.5 kWh
正解:A
質問 5:
Per NEC 690.4, who is qualified to install a PV system?
A. A licensed electrician or supervised trainee
B. Only a NABCEP-certified installer
C. A journeyman with PV experience
D. Anyone with basic electrical knowledge
正解:A
質問 6:
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. 1.92V
B. 0.48V
C. 0.96V
D. 1.44V
正解:C
質問 7:
A homeowner is weighing the PV module options for a roof-mounted solar array. Which is a correct option to present to the homeowner?
A. Building-integrated PV shingles will be flush or nearly flush with other shingles, but the electrical energy produced will be less than polycrystalline or monocrystalline modules.
B. Polycrystalline modules are more shade-tolerance than either amorphous or monocrystalline modules and allow a larger array to be installed, including in area where shading could be seasonally problematic.
C. Rapid shutdown requirements within 1 ft of the array boundary.
D. Microinverters can be installed with either polycrystalline or monocrystalline modules, negating the need for rapid shutdown compliance.
正解:D
質問 8:
A microinverter system uses 30 modules, each rated at 320W, with an inverter efficiency of 96%. The AC output is connected to a 208V three-phase service. What is the total three-phase power output?
A. 9.6 kW
B. 10.0 kW
C. 9.2 kW
D. 8.8 kW
正解:C
Katsumura -
Pass4Testのおかげで無事合格だぁ!!PVIPこの問題集はとてもわかりやすいので、しっかりとした理解に導いてくれるNABCEPのPVIP問題集が合格への最短ルートです。