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</p> Signup and view all the answers

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

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

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

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

    What is the primary factor causing turbines to lose efficiency?

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

    Why are wind turbines only really effective in certain locations?

    <p>Turbulence caused by buildings and trees</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%</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</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</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</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</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</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</p> Signup and view all the answers

    How do turbine farms contribute to reducing CO2 emissions?

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

    What is the main human source of greenhouse gas emissions?

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

    What is the primary role of wind turbines?

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

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

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

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

    <p>Noise, birds, visual impacts</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.</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</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</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</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</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</p> Signup and view all the answers

    What is a Carbon Footprint?

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

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

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

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

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

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

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

    What is the main difference between HAWT and VAWT?

    <p>Their vertical orientation</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.</p> Signup and view all the answers

    What is the unit used to express a carbon footprint?

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

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

    <p>False</p> Signup and view all the answers

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

    <p>True</p> Signup and view all the answers

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

    <p>False</p> Signup and view all the answers

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

    <p>True</p> Signup and view all the answers

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

    <p>False</p> Signup and view all the answers

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

    <p>False</p> Signup and view all the answers

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

    <p>False</p> Signup and view all the answers

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

    <p>False</p> Signup and view all the answers

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

    <p>True</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</p> Signup and view all the answers

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

    <p>False</p> Signup and view all the answers

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

    <p>False</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</p> Signup and view all the answers

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

    <p>True</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</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</p> Signup and view all the answers

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

    <p>False</p> Signup and view all the answers

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

    <p>True</p> Signup and view all the answers

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

    <p>True</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</p> Signup and view all the answers

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

    <p>True</p> Signup and view all the answers

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

    <p>False</p> Signup and view all the answers

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

    <p>False</p> Signup and view all the answers

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

    <p>False</p> Signup and view all the answers

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

    <p>False</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</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</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</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</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</p> Signup and view all the answers

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

    <p>True</p> Signup and view all the answers

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

    <p>False</p> Signup and view all the answers

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

    <p>True</p> Signup and view all the answers

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

    <p>False</p> Signup and view all the answers

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

    <p>False</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</p> Signup and view all the answers

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

    <p>False</p> Signup and view all the answers

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

    <p>True</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</p> Signup and view all the answers

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

    <p>False</p> Signup and view all the answers

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