80 Questions
What is a Carbon Footprint?
The total amount of greenhouse gases produced by human activities
Which type of wind turbine is generally 4 times more efficient?
Lift devices
What is the main unit for expressing a Carbon Footprint?
Ton of carbon dioxide (CO2)
How is the Carbon Footprint of an individual calculated?
By totaling the emissions of CO2 produced from their activities in a given time frame
Which type of wind turbine axis is mentioned in the text?
Horizontal axis and Vertical axis
What is the noise level of a typical wind turbine at 250 meters away?
45 dB
At what wind speed must turbines operate in order to collect a worthwhile amount of energy?
6 m/s
What is the primary factor causing turbines to lose efficiency?
Turbulence from buildings and trees
Why are wind turbines only really effective in certain locations?
Turbulence caused by buildings and trees
How much has the cost per kilowatt-hour of wind energy decreased in the past two decades?
80%
At what wind speed must be maintained to collect a worthwhile amount of energy from wind turbines?
5 m/s
What is the main factor that causes wind turbines to lose efficiency?
Turbulence from buildings and trees
Which of the following statements is true about the reliability of wind energy?
Wind energy reliability varies depending on location
What is the average noise level of a typical turbine at 250 m away, as mentioned in the text?
45 dB
In which scenario would wind energy generation be most unreliable?
Locations with buildings causing turbulence in the air
What is the purpose of having turbine farms in multiple locations?
To ensure a constant collection of wind energy
How do turbine farms contribute to reducing CO2 emissions?
By replacing some coal-burning power plants
What is a greenhouse gas (GHG)?
A gas that absorbs and re-emits heat, keeping the atmosphere warmer
What is the main human source of greenhouse gas emissions?
Deforestation and land use changes
What does global warming potential (GWP) measure?
The amount of heat trapped by a certain mass of a greenhouse gas compared to carbon dioxide
What is the primary role of wind turbines?
Converting kinetic energy into mechanical power
Which type of wind turbine design is most commonly used in modern large turbines?
Horizontal-axis variety
What are the advantages of wind energy mentioned in the text?
Renewable and cost-effective
What are the disadvantages of wind turbines as mentioned in the text?
Noise, birds, visual impacts
Which statement accurately reflects the noise level aspect of wind turbines?
The noise produced by wind turbines can be a disadvantage.
What is the primary advantage of wind energy mentioned in the text?
It can be harnessed without causing significant environmental damage
Why are most large modern wind turbines horizontal-axis turbines?
They are more reliable and efficient in harnessing wind energy
What is a significant disadvantage of wind turbines mentioned in the text?
Unpredictable variations in wind speed leading to intermittent power production
Why is wind energy considered to be a local renewable resource?
Wind resources are available at a regional or local level
What sets wind energy apart from other renewable options in terms of reliability?
It provides a more consistent and predictable source of electricity
What is a Carbon Footprint?
The total amount of greenhouse gases produced to support human activities
In the context of wind turbines, what does HAWT stand for?
Horizontal Axis Wind Turbine
Which type of wind turbine is generally 4 times more efficient?
Vertical Axis Wind Turbines
What is the primary unit used to express a carbon footprint?
Equivalent tons of Carbon Dioxide (CO2)
What does VAWT stand for in the context of wind turbines?
Vertical Axis Wind Turbine
Which type of turbine can be subdivided into micro, small, medium, and large?
Horizontal Axis Wind Turbines
What makes lift devices generally more efficient than drag devices in wind turbines?
They have a higher energy conversion rate
What is the main difference between HAWT and VAWT?
Their vertical orientation
What is the primary purpose of a carbon footprint measurement?
To determine the impact of human activities on the environment.
What is the unit used to express a carbon footprint?
Equivalent tons of Carbon Dioxide (CO2)
Vertical-axis wind turbines are more commonly used in modern large wind farms.
False
The Darrieus model is a type of vertical-axis wind turbine.
True
Vertical-axis wind turbines are more efficient than horizontal-axis turbines.
False
Vertical-axis wind turbines have a higher capital cost compared to conventional turbines.
True
Modern wind turbines can only create electric power between 500 and 1000 KW.
False
Vertical-axis turbines are generally 4 times more efficient than horizontal-axis turbines.
False
Vertical-axis turbines are commonly used in modern large wind farms.
False
Vertical-axis turbines have a higher noise level compared to horizontal-axis turbines.
False
Vertical-axis turbines are more prone to efficiency loss due to changes in wind direction.
True
Vertical-axis turbines contribute to reducing CO2 emissions by a greater margin compared to horizontal-axis turbines.
False
Vertical-axis turbines are generally 4 times more efficient than horizontal-axis turbines.
False
High ground and shore are the only really effective places to build vertical-axis turbines.
False
The noise level of a typical vertical-axis turbine is 45 dB at 250 m away.
False
Vertical-axis turbines lose efficiency at high and low wind speeds.
True
The primary factor causing vertical-axis turbines to lose efficiency is turbulence caused by buildings, trees, and land formations.
True
Horizontal axis wind turbines (HAWT) are generally 4 times more efficient than Vertical axis wind turbines (VAWT)
True
The main disadvantage of horizontal-axis turbines is their susceptibility to noise pollution.
False
Sizes of horizontal-axis wind turbines can be categorized into small, medium, and large.
True
Horizontal axis wind turbines are less effective in certain locations due to their design limitations.
True
The noise level of a typical horizontal-axis wind turbine at 250 meters away is negligible.
False
Vertical axis wind turbines (VAWT) are generally less efficient than horizontal axis wind turbines (HAWT).
True
VAWT are typically subdivided into micro, small, medium, and large sizes.
False
VAWT are also known as drag devices in wind turbine terminology.
False
VAWT and HAWT operate in a similar manner to harness wind energy.
False
VAWT are generally considered more reliable than HAWT in terms of wind energy generation.
False
Horizontal-axis wind turbines are the most efficient type of wind turbine design for modern large turbines.
False
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.
True
Horizontal-axis wind turbines are only really effective in locations with high ground and shore due to the uniform wind movement.
False
The space needed between each horizontal-axis wind turbine to maintain efficiency can be used for farming.
True
The cost per kilowatt-hour of energy produced by horizontal-axis wind turbines is significantly lower than that of hydrocarbon fuel (coal).
True
Horizontal-axis wind turbines are more commonly used in modern large wind farms.
True
Horizontal-axis wind turbines have a higher capital cost compared to vertical-axis turbines.
False
Modern horizontal-axis wind turbines can create electric power between 500 and 1500 KW.
True
Vertical-axis wind turbines are generally 4 times more efficient than horizontal-axis turbines.
False
The main advantage of horizontal-axis wind turbines is their low environmental impact.
False
Horizontal-axis wind turbines are designed to harness wind power to produce mechanical power only, not electricity.
False
The primary purpose of horizontal-axis wind turbines is to grind grain and pump water.
False
Horizontal-axis wind turbines are considered to be the most cost-effective renewable option.
True
The noise level of a typical horizontal-axis wind turbine at 250 meters away is high.
False
Horizontal-axis wind turbines are site dependent and cannot be used in multiple locations.
False
Test your knowledge of wind energy systems engineering technology with this quiz. Explore the principles of wind turbines, their functions in converting kinetic energy into mechanical power, and their role in generating electricity for various applications.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
