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

Accepted Answer

The statement implies that the Wild AC cannot be used directly due to the interference of harmonics.

Question 2

Most small wind turbines use a permanent ____.
A) diesel generator
B) portable generator
C) magnet generator
D) ac generator

Accepted Answer

Most small wind turbines use a permanent magnet generator to convert the kinetic energy of the wind into electrical energy. This type of generator is preferred because it is more efficient, compact, and requires less maintenance compared to other types of generators like diesel or portable generators. Additionally, permanent magnet generators can generate electricity at lower wind speeds, making them ideal for small-scale wind turbines.

Question 3

What is the rectifier's function in the system?

Accepted Answer

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.

Accepted Answer

Wind energy is a form of solar energy, as wind is caused by the heating of the atmosphere by the sun, the rotation of the Earth, and the Earth's surface irregularities.

Question 5

A wind turbine system is a complex electrical system.

Accepted Answer

A wind turbine system involves a number of electrical components, such as generators, transformers, controllers, and inverters, that work together to convert wind energy into usable electricity. Additionally, the system may also include a variety of mechanical components, such as blades, shafts, and bearings, that help to capture and convert the kinetic energy of the wind. Overall, the design and operation of a wind turbine system requires a significant amount of technical expertise and engineering knowledge.

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

Accepted Answer

Article 694.10(A) of the National Electrical Code (NEC) specifies that the maximum voltage for a wind turbine installed for a one or two-family dwelling is 600 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

Accepted Answer

The answer of The output of the wind turbine depends...

Question 8

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

Accepted Answer

The input circuits of the rectifiers are designed to have continuous waveform to ensure smooth output.

Question 9

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

Accepted Answer

The answer of What assumptions can you make regarding a...

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

Accepted Answer

According to 694.30 (A), turbine output circuits over 30 volts that are installed in readily accessible locations must be installed in raceways. This is to ensure protection and safety by enclosing the electrical wires in a solid enclosure.

Question 11

How are large scale wind turbines monitored?

Accepted Answer

The answer of 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

Accepted Answer

Interactive inverters must have provisions for anti-islanding, which is a safety feature that ensures the inverter shuts off if there is a power outage. This prevents the inverter from continuing to supply power to the grid while it is being repaired, which can be dangerous for utility workers. A, B, and C are not related to the requirements of interactive inverters.

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

Accepted Answer

Dump resistor is commonly used to divert excess energy generated from wind turbines when the batteries are fully charged or the inverter voltage reaches a critical level. By adding this load, the turbine can continue to operate at a safe and efficient level. Foil resisters, filament resistors, and photo resistors are not typically used for this purpose.

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

Accepted Answer

Copper or copper-clad electrodes can cause electrolytic corrosion of the galvanized components.

Question 15

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

Accepted Answer

While there may be some variations depending on the specific application and design of the wind turbine, the basic electrical systems used are generally similar.

Question 16

The wind has been used a source of energy for approximately ____ years.
A) 200
B) 900
C) 1000
D) 3000

Accepted Answer

The use of wind as a source of energy dates back about 3000 years, with early civilizations using wind to propel boats along the Nile River around 5000 BC and the first known windmill used for pumping water and grinding grain in Persia around 500-900 AD.

Question 17

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

Accepted Answer

The largest collection of wind generators in the world is the Gansu Wind Farm in China. The Tehachapi Wind Farm is one of the largest in the United States.

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

Accepted Answer

NEC article 694 specifically covers Small Wind Electric Systems, which includes wind turbine systems up to and including 100kW.

Question 19

Cite characteristics of wind farm designs.

Accepted Answer

The answer of Cite characteristics of wind farm designs....

Question 20

What does a surge protector protect you from?

Accepted Answer

The answer of What does a surge protector protect you...

Quiz 4: Wind Power

The Wild AC is full of harmonics and ____.

Most small wind turbines use a permanent ____.

What is the rectifier's function in the system?

Wind energy is actually a converted form of fuel energy.

A wind turbine system is a complex electrical system.

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

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

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

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

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

How are large scale wind turbines monitored?

By definition, interactive inverters must have provisions for ____.

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

Copper or copper-clad electrodes can cause ____.

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

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

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

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

Cite characteristics of wind farm designs.

What does a surge protector protect you from?