Deck 4: Wind Power

Question 1

The Wild AC is full of harmonics and ____.

A) cannot be used directly
B) should be transposed
C) must be allocated
D) cannot be identified

Answer 1

A

Question 2

Most small wind turbines use a permanent ____.

A) diesel generator
B) portable generator
C) magnet generator
D) ac generator

Answer 2

C

Question 3

What is the rectifier's function in the system?

Answer 3

The rectifier's function in the system is to take the variable-voltage, variable-frequency output of the turbine and convert it to DC for the inverter input.

Question 4

Wind energy is actually a converted form of fuel energy.

Question 5

A wind turbine system is a complex electrical system.

Question 6

Article 694.10(A) requires that the maximum voltage for a wind turbine installed for a one or two family dwelling is ____.

A) 400 volts
B) 600 volts
C) 800 volts
D) 1000 volts

Question 7

The output of the wind turbine depends on the size of the rotor and the ____ of the wind passing through it.

A) speed
B) temperature
C) composition
D) density

Question 8

The input circuits of the rectifiers are considered to be continuous.

Question 9

What assumptions can you make regarding a well grounded tower that is struck by lightning?

Question 10

According to 694.30 (A) turbine output circuits over 30 volts that are installed in readily accessible locations systems must be installed in ____.

A) enclosures
B) nacelles
C) raceways
D) housings

Question 11

How are large scale wind turbines monitored?

Question 12

By definition, interactive inverters must have provisions for ____.

A) anti-static
B) anti-spiraling
C) anti-idleness
D) anti-islanding

Question 13

In the event the inverter voltage reaches a critical voltage, the turbine is loaded with the addition of a load or ____.

A) foil resistor
B) filament resistor
C) photo resistor
D) dump resistor

Question 14

Copper or copper-clad electrodes can cause ____.

A) skin lesions to the system operators
B) unexpected results at best
C) electrolytic corrosion of the galvanized components
D) significant 50 or 60 Hz artifacts arising from the power system's frequency

Question 15

The electrical systems that are used by wind turbines are basically the same for most applications.

Question 16

The wind has been used a source of energy for approximately ____ years.

A) 200
B) 900
C) 1000
D) 3000

Question 17

The Tehachapi Wind Farm is the largest collection of wind generators in the world.

Question 18

Wind Turbine systems up to and including 100kW are covered under ____.

A) NEC article 682
B) NEC article 686
C) NEC article 690
D) NEC article 694

Question 19

Cite characteristics of wind farm designs.

Question 20

What does a surge protector protect you from?