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wind energy

Total questions: 94

Worksheet time: 2hrs 38mins

Name
Class
Date
1.

As blade ______ increases the potential power output of the wind turbine increases.

a)

Width

b)

length

c)

Span

2.

What is Wind Turbine Blade Span?

a)

How wide the blade is

b)

How long the blade is

c)

the diameter of the largest circle swept by any part of the fan blade

3.

Do longer blades generate (make) more power?

a)

Yes

b)

No

c)

Usually

d)

If they are designed well

4.

What is the blade chord?

a)

the "front" of the blade airfoil that cuts into the wind

b)

width of the blade measured from the leading edge to the trailing edge

c)

the "back" of the blade airfoil

5.

Where is the Root of a turbine blade ?

a)

the "back" of the blade airfoil

b)

the "front" of the blade airfoil that cuts into the wind

c)

where the blade is attached to the turbine

d)

width of the blade measured from the leading edge to the trailing edge

6.

Aerodynamic shape that provides high lift and low drag like an airplane wing

a)

airfoil

b)

wind blade

c)

fan blade

d)

teardrop

7.

To generate power, wind turbine blades need to spin and create ___________

a)

air

b)

torque

c)

wind

8.

Which forces are important in the movement of wind turbine blades? (check all that apply)

a)

lift

b)

drag

c)

torque

d)

spin

e)

velocity

9.

Newton's third law states that for every _________, there is an equal and opposite reaction. In the case of a wind turbine blade, the action of the wind pushing against the blade causes a reaction — the blade is deflected, or pushed in the opposite direction.

a)

movement

b)

motion

c)

action

d)

act

10.

What is Rotational Energy?

a)

Energy created when something drops from a distance

b)

The forward motion of an object

c)

Energy created from an object turning in a circular motion

11.

What are the units of power measured in?

a)

Volts

b)

Watts

c)

Joules

d)

torques

12.

Drag force should be ________and Lift force should be _________

a)

high, low

b)

low, high

c)

equal, low

d)

same, high

13.

As blade ______ increases the potential power output of the wind turbine increases.

a)

Width

b)

length

c)

Span

14.

What is Wind Turbine Blade Span?

a)

How wide the blade is

b)

How long the blade is

c)

the diameter of the largest circle swept by any part of the fan blade

15.

Do longer blades generate (make) more power?

a)

Yes

b)

No

c)

Usually

d)

If they are designed well

16.

What is the blade chord?

a)

the "front" of the blade airfoil that cuts into the wind

b)

width of the blade measured from the leading edge to the trailing edge

c)

the "back" of the blade airfoil

17.

Where is the Root of a turbine blade ?

a)

the "back" of the blade airfoil

b)

the "front" of the blade airfoil that cuts into the wind

c)

where the blade is attached to the turbine

d)

width of the blade measured from the leading edge to the trailing edge

18.

Aerodynamic shape that provides high lift and low drag like an airplane wing

a)

airfoil

b)

wind blade

c)

fan blade

d)

teardrop

19.

To generate power, wind turbine blades need to spin and create ___________

a)

air

b)

torque

c)

wind

20.

Which forces are important in the movement of wind turbine blades? (check all that apply)

a)

lift

b)

drag

c)

torque

d)

spin

e)

velocity

21.

Newton's third law states that for every _________, there is an equal and opposite reaction. In the case of a wind turbine blade, the action of the wind pushing against the blade causes a reaction — the blade is deflected, or pushed in the opposite direction.

a)

movement

b)

motion

c)

action

d)

act

22.

What is Rotational Energy?

a)

Energy created when something drops from a distance

b)

The forward motion of an object

c)

Energy created from an object turning in a circular motion

23.

What are the units of power measured in?

a)

Volts

b)

Watts

c)

Joules

d)

torques

24.

Drag force should be ________and Lift force should be _________

a)

high, low

b)

low, high

c)

equal, low

d)

same, high

25.
What makes wind turbine blades turn?
a)
Sun
b)
Clouds
c)
Wind
26.
Where would we find many wind turbines?
a)
Wind Farm
b)
Tree Farm 
c)
Gold Mine
27.
What changes wind energy into electricity?
a)
Box Kite
b)
Windsock
c)
Wind Turbine
28.
What part of a wind turbine turns?
a)
Wires
b)
Blades
c)
Lamps
29.
How does electricity help people?
a)
Runs Appliances
b)
Makes Rain
c)
Stops Hurricanes
30.

The diagram above shows a wind turbine. Which section of the wind turbine converts wind energy to electrical energy?

a)

blades

b)

generator

c)

rotor

d)

pitch system

31.

The diagram above shows a wind turbine. Which section of the wind turbine converts wind energy to electrical energy?

a)

blades

b)

generator

c)

rotor

d)

pitch system

32.

What causes the production of wind?

a)

rotation of the Earth

b)

variations in the Earth's atmosphere

c)

the Sun heating the atmosphere

d)

all of the above

33.

What causes the production of wind?

a)

rotation of the Earth

b)

variations in the Earth's atmosphere

c)

the Sun heating the atmosphere

d)

all of the above

34.

How many blades does a modern wind turbine have?

a)

2

b)

3

c)

4

d)

There is no standard number of blades

35.

How many blades does a modern wind turbine have?

a)

2

b)

3

c)

4

d)

There is no standard number of blades

36.

Roughly how tall are most utility - scale wind turbine towers in the U.S.

a)

65 meters (213 feet)

b)

82 meters (269 feet)

c)

114 meters (374 feet)

d)

140 meters (460 feet)

37.

Which U.S. state gets the highest percentage of its electricity from wind?

a)

Iowa

b)

Texas

c)

Kansas

d)

South Dakota

38.

Which U.S. state gets the highest percentage of its electricity from wind?

a)

Iowa

b)

Texas

c)

Kansas

d)

South Dakota

39.

The map below shows the annual average wind within the U.S. Which U.S. region is most likely to benefit from wind turbines?

a)

Western region of the U.S.

b)

Southern region of the U.S.

c)

Midwest region of the U.S.

d)

Northeast region of the U.S.

40.

what does a wind turbine look like

a)
b)
41.
What is the name of part A in the wind turbine above?
a)
Blade
b)
Gear
c)
Generator
d)
Axle
42.
What is the name of part A in the wind turbine above?
a)
Blade
b)
Gear
c)
Generator
d)
Axle
43.
What is the name of part A in the wind turbine above?
a)
Blade
b)
Gear
c)
Generator
d)
Axle
44.

What type of energy is torque?

a)

Rational energy

b)

potential energy

c)

chemical energy

d)

wind energy

45.

Why is wind energy considered a renewable resource?

a)

It can be harnessed by human beings.

b)

It's related to the weather

c)

It's unlikely that humans will run out of it anytime soon.

d)

It can be used to generate electricity.

46.

What is the best definition of a generator?

a)

A device that measures wind speed.

b)

A device that converts mechanical motion into electricity.

c)

A device that conducts electrical current through a wire

d)

A device that spins when exposed to wind.

47.

Electric current is the flow of ______________________

a)

electrons

b)

protons

c)

neutrons

d)

both protons and neutrons

48.

Why is hydropower also called "hydroelectric power"?

a)

Moving water can be poured into an electrical outlet.

b)

It harnesses energy from flowing water and converts it into electricity.

c)

Both of the above.

d)

None of the above.

49.
Dams are built to harness the power of this renewable resource.
a)
Sun
b)
Wind
c)
Water
d)
Geothermal
50.
This renewable resource comes from deep within the Earth.
a)
Biomass
b)
Geothermal Energy
c)
Hydropower
d)
Solar Energy
51.

__________uses heat from the interior of the Earth.

a)

Solar

b)

Geothermal

c)

Nucler

d)

Wind

52.
__________is the energy created by wind turning wind turbines.
a)
Geothermal
b)
Hydro
c)
Wind
d)
Nuclear
53.
Solar Power is a __________ energy resource.
a)
Renewable
b)
Nonrenewable
54.
Hyrdo Power is a __________ energy resource.
a)
Renewable
b)
Nonrenewable
55.
Coal is a __________ energy resource.
a)
Renewable
b)
Nonrenewable
56.
__________ is an energy resource that WILL NOT run out in the next several hundred years.
a)
Renewable Energy Resource
b)
Nonrenewable Energy Resource
57.
Do Renewable energy sources run out?
a)
Yes 
b)
No
58.

Where is the Root of a turbine blade ?

a)

the "back" of the blade airfoil

b)

the "front" of the blade airfoil that cuts into the wind

c)

where the blade is attached to the turbine

d)

width of the blade measured from the leading edge to the trailing edge

59.

Where is the Root of a turbine blade ?

a)

the "back" of the blade airfoil

b)

the "front" of the blade airfoil that cuts into the wind

c)

where the blade is attached to the turbine

d)

width of the blade measured from the leading edge to the trailing edge

60.

Aerodynamic shape that provides high lift and low drag like an airplane wing

a)

airfoil

b)

wind blade

c)

fan blade

d)

teardrop

61.

Aerodynamic shape that provides high lift and low drag like an airplane wing

a)

airfoil

b)

wind blade

c)

fan blade

d)

teardrop

62.

What is Rotational Energy?

a)

Energy created when something drops from a distance

b)

The forward motion of an object

c)

Energy created from an object turning in a circular motion

63.

What percentage of the world's energy does the United States consume?

a)

56 percent

b)

25 percent

c)

18 percent

d)

3 percent

64.
What is the purpose of building a prototype?
a)
to test the product and make sure that it is the best solution to the problem
b)
to make sure that the product is in compliance with government regulations
c)
to determine the design constraints for the product
65.
When finding the solution to an engineering problem, there is/are usually 
a)
only one possible correct solution
b)
a very limited number of possible correct solutions
c)
many possible correct solutions
66.

Create Solutions for environmental problems affecting the welfare of humans and nature.

a)

Environmental Engineers

b)

Nature Engineers

c)

Electrical Engineers

d)

Biomedical Engineers

67.

____________ is produced through methods that do not release greenhouse gases or any other pollutants

a)

Energy

b)

Clean Energy

c)

Clear energy

68.

The synonym of the verb "midigate" is _________

a)

resume

b)

reduce

c)

decrease

69.

The synonym of the word "reliance " is ___________

a)

dependence

b)

independence

c)

consuming

70.

Renewable Energy______________.

a)

increases the reliance on Fossil Fuels.

b)

causes climate change

c)

doesn't create any direct green gas emissions

71.

Which energy type has the highest initial cost?

a)

Solar

b)

Wind

c)

Nuclear

d)

Hydro

72.

Which energy type has the lowest operational cost per kW-yr? Choose 2.

a)

Nuclear

b)

Hydro

c)

Wind

d)

Solar

73.

Which energy type provides the highest energy output?

a)

Solar

b)

Wind

c)

Nuclear

d)

Hydro

74.

Which energy type has a "High" cost-benefit ratio due to its huge output over decades?

a)

Solar

b)

Nuclear

c)

Wind

d)

Hydro

75.

Which energy type is most dependent on weather conditions? Choose 2.

a)

Nuclear

b)

Hydro

c)

Solar

d)

Wind

76.

What is the approximate initial cost range for a large hydro dam?

a)

100M−500M100M-500M

b)

1B−5B1B-5B

c)

6B−12B6B-12B

d)

100M−1B100M-1B

77.

Which energy type’s benefits are limited by water availability?

a)

Solar

b)

Wind

c)

Nuclear

d)

Hydro

78.

The table lists nuclear’s initial cost as ~6B - 12B. Why does this high cost still lead to a "High" cost-benefit ratio?

a)

It has the lowest operational cost

b)

It produces energy at a 90%+ capacity factor

c)

It uses cheaper fuel than hydro

d)

It requires less maintenance than solar

79.

Solar’s operational cost is 20 - 40/kW-yr. What does this suggest about its long-term use compared to nuclear (700 - 900/kW-yr)?

a)

Solar is more expensive to maintain over time

b)

Nuclear is cheaper to run after construction

c)

Solar has lower ongoing costs, making it more affordable long-term

d)

Nuclear’s output is too low to justify its operational cost

80.

Wind has a capacity factor of ~30-40%. What does this imply about its reliability compared to hydro (~50-70%)?

a)

Wind is more reliable because it’s renewable

b)

Hydro is more consistent due to higher output potential

c)

Wind produces more energy in all conditions

d)

Hydro’s output is less predictable than wind’s

81.

Hydro’s initial cost is 1B - 5B. Why might this be a better investment for a river-rich region than solar (100M - 1B)? Choose 3.

a)

Hydro has a lower operational cost

b)

Solar’s energy output is too high for small regions

c)

Hydro’s steady output outweighs its higher upfront cost

d)

Solar requires more maintenance than hydro

82.

Nuclear’s operational cost is 700 - 900/kW-yr. What does this high cost reflect compared to wind (40 - 60/kW-yr)?

a)

Wind’s higher fuel expenses

b)

Nuclear’s need for safety and waste management

c)

Wind’s greater energy output

d)

Nuclear’s lower maintenance needs

83.

Solar’s capacity factor is ~20-25%. What does this low percentage suggest about its use in a cloudy region?

a)

It would perform better than nuclear

b)

Its energy output would be less reliable than hydro

c)

It would have a higher cost-benefit ratio than wind

d)

Its operational costs would decrease

84.

The table notes wind’s initial cost as 100M - 500M. Why might this make it a good choice for a small, windy community over nuclear (6B - 12B)?

a)

Wind’s higher energy output justifies its cost

b)

Nuclear’s lower operational cost is less important

c)

Wind’s lower upfront cost fits a smaller budget

d)

Nuclear is too renewable for small areas

85.

The table lists solar’s initial cost as 100M - 1B. Why might this range make it more appealing than hydro

(1B-5B) for a budget-conscious town, given solar’s operational cost is ~20 - 40/kW-yr?

a)

Solar’s higher energy output offsets its cost

b)

Hydro’s operational costs are too high

c)

Solar offers a lower entry cost and similar ongoing expenses

d)

Hydro’s capacity factor is less predictable

86.

Why is clean energy on the rise?

a)

It runs out quickly.

b)

It makes little to no air pollution.

c)

It's easier to use.

d)

Electricity is dangerous.

87.

What is another name for clean energy?

a)

non-renewable energy

b)

Earth energy

c)

renewable energy

d)

electric energy

88.

What is a large group of wind turbines sitting on flat land called?

a)

wind farm

b)

spinning farm

c)

windmill

d)

windy city

89.

What type of clean energy is used in this photo?

a)

hydro energy

b)

solar energy

c)

wind energy

d)

magnetic energy

90.

Where is a Offshore wind turbine made

a)

on land

b)

in water

c)

on a hill

d)

in a building

91.
Which part of the wind turbine produces electricity?
a)
Blades
b)
Generator
c)
All the wind turbine
d)
None of them
92.
Which part of the wind turbine produces electricity?
a)
Blades
b)
Generator
c)
All the wind turbine
d)
None of them
93.

How do batteries work?

a)

They store mechanical energy to be converted to chemical energy.

b)

They store electrical energy to be converted to chemical energy.

c)

They store mechanical energy to be converted to electrical energy.

d)

They store chemical energy to be converted to electrical energy.

94.
Where will it be better to place a wind turbine? Where will it receive more wind?
a)
On top of a hill/mountain
b)
On the bottom of a hill/mountain
c)
Is the same
d)
I don't know