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A 20 kW system has a measured output of 18 kW at STC. What is the total system loss?

A.

5%

B.

10%

C.

15%

D.

20%

A site survey indicates a residential roof with a 4:12 pitch facing 20° east of south. The local latitude is 35°N, and the optimal tilt for maximum annual production is equal to latitude. What adjustment should be made to compensate for the roof’s orientation and tilt to achieve near-optimal output?

A.

Increase array capacity by 5%

B.

Install adjustable racking to match 35° tilt

C.

Rotate modules 20° west to face true south

D.

No adjustment needed; output loss is negligible

Which of the following is an NEC requirement regarding access for large-scale PV electric power production facilities?

A.

Field-applied hazard markings must be installed, and access to the supply station is to be restricted by fencing or other adequate means.

B.

All fencing and associated gates must have ac and dc current and voltage exposure labvels and must be electrically isolated from the solar facility.

C.

Arc flash warning labels must be field-applied by the installer at all access points for qualified persons and at the point of the utility interconnection directory.

D.

Access to remote isolating equipment for servicing is allowed for individual other than qualified persons when the equipment is enclosed within a secure structure.

A PV array’s tilt is 15° at a latitude of 35°N. What is the annual energy loss compared to optimal tilt?

A.

1-2%

B.

3-5%

C.

6-8%

D.

10-12%

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.

400 lbs

D.

600 lbs

Which temperature coefficient is used in the calculation to verify energy production of a PV system?

A.

OptionA

B.

OptionB

C.

OptionC

D.

OptionD

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.

Central inverter with data acquisition system located at the inverter.

B.

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

C.

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

D.

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

A system’s inverter efficiency drops from 97% to 94% due to aging. What is the percentage increase in energy loss?

A.

2.1%

B.

3.2%

C.

4.5%

D.

6.0%