NABCEP Small Wind Installer 2

Question 1

Which NEC article specifically governs the installation of small wind electric systems?

Accepted Answer

Article 694

Answer

Article 690

Answer

Article 692

Answer

Article 705

Question 2

At what reference wind speed are small wind turbines typically rated for power output per IEC 61400-2 and AWEA standards?

Accepted Answer

24.6 mph (11 m/s)

Answer

8 mph (3.5 m/s)

Answer

11 mph (4.9 m/s)

Answer

35 mph (15.6 m/s)

Question 3

What type of generator is most commonly used in small wind turbines?

Accepted Answer

Permanent magnet alternator

Answer

Synchronous generator directly coupled to the grid

Answer

Series-wound DC generator

Answer

Squirrel-cage induction generator

Question 4

Which tower type is generally recommended for ease of maintenance on small wind installations?

Accepted Answer

Tilt-up (hinged) monopole tower

Answer

Fixed lattice tower

Answer

Guyed lattice tower

Answer

Self-supporting monopole tower

Question 5

What is the purpose of a dump load (diversion load) in a battery-based small wind system?

Accepted Answer

To dissipate excess energy when the battery bank is fully charged

Answer

To start the turbine during low-wind conditions

Answer

To convert AC turbine output to DC for battery charging

Answer

To measure and log system energy production

Question 6

Per NEC Article 694, at what percentage of maximum output current must conductors in small wind output circuits be sized?

Accepted Answer

125%

Answer

100%

Answer

115%

Answer

150%

Question 7

What protection device is required on a grid-tied small wind system to prevent the turbine from energizing utility lines during a grid outage?

Accepted Answer

Anti-islanding protection

Answer

Surge protection device (SPD)

Answer

Ground fault protection device (GFPD)

Answer

Arc fault circuit interrupter (AFCI)