ESET 222: Wind Energy Systems Engineering Technology Quiz
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Questions and Answers

What is a Carbon Footprint?

  • The efficiency of different sizes of wind turbines
  • The total amount of greenhouse gases produced by human activities (correct)
  • The amount of wind turbine noise measured in decibels
  • The energy output of a vertical axis wind turbine

Which type of wind turbine is generally 4 times more efficient?

  • Small horizontal axis wind turbines
  • Large vertical axis wind turbines
  • Lift devices (correct)
  • Drag devices

What is the main unit for expressing a Carbon Footprint?

  • Kilowatt-hour
  • Decibel
  • Ton of carbon dioxide (CO2) (correct)
  • Watt

How is the Carbon Footprint of an individual calculated?

<p>By totaling the emissions of CO2 produced from their activities in a given time frame (C)</p> Signup and view all the answers

Which type of wind turbine axis is mentioned in the text?

<p>Horizontal axis and Vertical axis (B)</p> Signup and view all the answers

What is the noise level of a typical wind turbine at 250 meters away?

<p>45 dB (A)</p> Signup and view all the answers

At what wind speed must turbines operate in order to collect a worthwhile amount of energy?

<p>6 m/s (A)</p> Signup and view all the answers

What is the primary factor causing turbines to lose efficiency?

<p>Turbulence from buildings and trees (C)</p> Signup and view all the answers

Why are wind turbines only really effective in certain locations?

<p>Turbulence caused by buildings and trees (B)</p> Signup and view all the answers

How much has the cost per kilowatt-hour of wind energy decreased in the past two decades?

<p>80% (A)</p> Signup and view all the answers

At what wind speed must be maintained to collect a worthwhile amount of energy from wind turbines?

<p>5 m/s (B)</p> Signup and view all the answers

What is the main factor that causes wind turbines to lose efficiency?

<p>Turbulence from buildings and trees (C)</p> Signup and view all the answers

Which of the following statements is true about the reliability of wind energy?

<p>Wind energy reliability varies depending on location (D)</p> Signup and view all the answers

What is the average noise level of a typical turbine at 250 m away, as mentioned in the text?

<p>45 dB (B)</p> Signup and view all the answers

In which scenario would wind energy generation be most unreliable?

<p>Locations with buildings causing turbulence in the air (C)</p> Signup and view all the answers

What is the purpose of having turbine farms in multiple locations?

<p>To ensure a constant collection of wind energy (D)</p> Signup and view all the answers

How do turbine farms contribute to reducing CO2 emissions?

<p>By replacing some coal-burning power plants (C)</p> Signup and view all the answers

What is a greenhouse gas (GHG)?

<p>A gas that absorbs and re-emits heat, keeping the atmosphere warmer (D)</p> Signup and view all the answers

What is the main human source of greenhouse gas emissions?

<p>Deforestation and land use changes (B)</p> Signup and view all the answers

What does global warming potential (GWP) measure?

<p>The amount of heat trapped by a certain mass of a greenhouse gas compared to carbon dioxide (B)</p> Signup and view all the answers

What is the primary role of wind turbines?

<p>Converting kinetic energy into mechanical power (D)</p> Signup and view all the answers

Which type of wind turbine design is most commonly used in modern large turbines?

<p>Horizontal-axis variety (B)</p> Signup and view all the answers

What are the advantages of wind energy mentioned in the text?

<p>Renewable and cost-effective (D)</p> Signup and view all the answers

What are the disadvantages of wind turbines as mentioned in the text?

<p>Noise, birds, visual impacts (C)</p> Signup and view all the answers

Which statement accurately reflects the noise level aspect of wind turbines?

<p>The noise produced by wind turbines can be a disadvantage. (A)</p> Signup and view all the answers

What is the primary advantage of wind energy mentioned in the text?

<p>It can be harnessed without causing significant environmental damage (D)</p> Signup and view all the answers

Why are most large modern wind turbines horizontal-axis turbines?

<p>They are more reliable and efficient in harnessing wind energy (A)</p> Signup and view all the answers

What is a significant disadvantage of wind turbines mentioned in the text?

<p>Unpredictable variations in wind speed leading to intermittent power production (A)</p> Signup and view all the answers

Why is wind energy considered to be a local renewable resource?

<p>Wind resources are available at a regional or local level (C)</p> Signup and view all the answers

What sets wind energy apart from other renewable options in terms of reliability?

<p>It provides a more consistent and predictable source of electricity (A)</p> Signup and view all the answers

What is a Carbon Footprint?

<p>The total amount of greenhouse gases produced to support human activities (A)</p> Signup and view all the answers

In the context of wind turbines, what does HAWT stand for?

<p>Horizontal Axis Wind Turbine (B)</p> Signup and view all the answers

Which type of wind turbine is generally 4 times more efficient?

<p>Vertical Axis Wind Turbines (A)</p> Signup and view all the answers

What is the primary unit used to express a carbon footprint?

<p>Equivalent tons of Carbon Dioxide (CO2) (C)</p> Signup and view all the answers

What does VAWT stand for in the context of wind turbines?

<p>Vertical Axis Wind Turbine (D)</p> Signup and view all the answers

Which type of turbine can be subdivided into micro, small, medium, and large?

<p>Horizontal Axis Wind Turbines (B)</p> Signup and view all the answers

What makes lift devices generally more efficient than drag devices in wind turbines?

<p>They have a higher energy conversion rate (B)</p> Signup and view all the answers

What is the main difference between HAWT and VAWT?

<p>Their vertical orientation (B)</p> Signup and view all the answers

What is the primary purpose of a carbon footprint measurement?

<p>To determine the impact of human activities on the environment. (A)</p> Signup and view all the answers

What is the unit used to express a carbon footprint?

<p>Equivalent tons of Carbon Dioxide (CO2) (A)</p> Signup and view all the answers

Vertical-axis wind turbines are more commonly used in modern large wind farms.

<p>False (B)</p> Signup and view all the answers

The Darrieus model is a type of vertical-axis wind turbine.

<p>True (A)</p> Signup and view all the answers

Vertical-axis wind turbines are more efficient than horizontal-axis turbines.

<p>False (B)</p> Signup and view all the answers

Vertical-axis wind turbines have a higher capital cost compared to conventional turbines.

<p>True (A)</p> Signup and view all the answers

Modern wind turbines can only create electric power between 500 and 1000 KW.

<p>False (B)</p> Signup and view all the answers

Vertical-axis turbines are generally 4 times more efficient than horizontal-axis turbines.

<p>False (B)</p> Signup and view all the answers

Vertical-axis turbines are commonly used in modern large wind farms.

<p>False (B)</p> Signup and view all the answers

Vertical-axis turbines have a higher noise level compared to horizontal-axis turbines.

<p>False (B)</p> Signup and view all the answers

Vertical-axis turbines are more prone to efficiency loss due to changes in wind direction.

<p>True (A)</p> Signup and view all the answers

Vertical-axis turbines contribute to reducing CO2 emissions by a greater margin compared to horizontal-axis turbines.

<p>False (B)</p> Signup and view all the answers

Vertical-axis turbines are generally 4 times more efficient than horizontal-axis turbines.

<p>False (B)</p> Signup and view all the answers

High ground and shore are the only really effective places to build vertical-axis turbines.

<p>False (B)</p> Signup and view all the answers

The noise level of a typical vertical-axis turbine is 45 dB at 250 m away.

<p>False (B)</p> Signup and view all the answers

Vertical-axis turbines lose efficiency at high and low wind speeds.

<p>True (A)</p> Signup and view all the answers

The primary factor causing vertical-axis turbines to lose efficiency is turbulence caused by buildings, trees, and land formations.

<p>True (A)</p> Signup and view all the answers

Horizontal axis wind turbines (HAWT) are generally 4 times more efficient than Vertical axis wind turbines (VAWT)

<p>True (A)</p> Signup and view all the answers

The main disadvantage of horizontal-axis turbines is their susceptibility to noise pollution.

<p>False (B)</p> Signup and view all the answers

Sizes of horizontal-axis wind turbines can be categorized into small, medium, and large.

<p>True (A)</p> Signup and view all the answers

Horizontal axis wind turbines are less effective in certain locations due to their design limitations.

<p>True (A)</p> Signup and view all the answers

The noise level of a typical horizontal-axis wind turbine at 250 meters away is negligible.

<p>False (B)</p> Signup and view all the answers

Vertical axis wind turbines (VAWT) are generally less efficient than horizontal axis wind turbines (HAWT).

<p>True (A)</p> Signup and view all the answers

VAWT are typically subdivided into micro, small, medium, and large sizes.

<p>False (B)</p> Signup and view all the answers

VAWT are also known as drag devices in wind turbine terminology.

<p>False (B)</p> Signup and view all the answers

VAWT and HAWT operate in a similar manner to harness wind energy.

<p>False (B)</p> Signup and view all the answers

VAWT are generally considered more reliable than HAWT in terms of wind energy generation.

<p>False (B)</p> Signup and view all the answers

Horizontal-axis wind turbines are the most efficient type of wind turbine design for modern large turbines.

<p>False (B)</p> Signup and view all the answers

The average noise level of a typical horizontal-axis wind turbine at 250 m away is lower than the average background noise in a home or office.

<p>True (A)</p> Signup and view all the answers

Horizontal-axis wind turbines are only really effective in locations with high ground and shore due to the uniform wind movement.

<p>False (B)</p> Signup and view all the answers

The space needed between each horizontal-axis wind turbine to maintain efficiency can be used for farming.

<p>True (A)</p> Signup and view all the answers

The cost per kilowatt-hour of energy produced by horizontal-axis wind turbines is significantly lower than that of hydrocarbon fuel (coal).

<p>True (A)</p> Signup and view all the answers

Horizontal-axis wind turbines are more commonly used in modern large wind farms.

<p>True (A)</p> Signup and view all the answers

Horizontal-axis wind turbines have a higher capital cost compared to vertical-axis turbines.

<p>False (B)</p> Signup and view all the answers

Modern horizontal-axis wind turbines can create electric power between 500 and 1500 KW.

<p>True (A)</p> Signup and view all the answers

Vertical-axis wind turbines are generally 4 times more efficient than horizontal-axis turbines.

<p>False (B)</p> Signup and view all the answers

The main advantage of horizontal-axis wind turbines is their low environmental impact.

<p>False (B)</p> Signup and view all the answers

Horizontal-axis wind turbines are designed to harness wind power to produce mechanical power only, not electricity.

<p>False (B)</p> Signup and view all the answers

The primary purpose of horizontal-axis wind turbines is to grind grain and pump water.

<p>False (B)</p> Signup and view all the answers

Horizontal-axis wind turbines are considered to be the most cost-effective renewable option.

<p>True (A)</p> Signup and view all the answers

The noise level of a typical horizontal-axis wind turbine at 250 meters away is high.

<p>False (B)</p> Signup and view all the answers

Horizontal-axis wind turbines are site dependent and cannot be used in multiple locations.

<p>False (B)</p> Signup and view all the answers

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