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Wind Turbine Pre Assessment

Total questions: 26

Worksheet time: 25mins

Name
Class
Date
1.
On the figure above, which one indicate the best wind direction to get the most energy?
a)
A
b)
B
c)
C
d)
D
2.

What do wind turbines, hydro electric dams, and ethanol plants have in common

a)

All produce electrical current without pollution

b)

All use generators to produce electrical current

c)

All convert gravitational potential energy to electric current

d)

All convert thermal energy to electrical energy

3.

Electric current is the flow of ______________________

a)

electrons

b)

protons

c)

neutrons

d)

both protons and neutrons

4.

The "pressure" that pushes the electrons in a circuit is called the ____________________________________

a)

voltage

b)

current

c)

resistance

d)

power

5.

_____________________ is the measurement of how many electrons are flowing in a point of a circuit.

a)

voltage

b)

current

c)

resistance

d)

power

6.

How many blades does a modern wind turbine have?

a)

2

b)

3

c)

4

d)

There is no standard number of blades

7.

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)

8.

What wind speed is said to be necessary to make large wind energy systems economically viable?

a)

6 m/s (13 mph)

b)

3 m/s (12 mph)

c)

9 m/s (20 mph)

d)

12 m/s (27 mph)

9.
What is the name of part A in the wind turbine above?
a)
Blade
b)
Gear
c)
Generator
d)
Axle
10.
What is the name of part B in the wind turbine above?
a)
Blade
b)
Gear
c)
Generator
d)
Axle
11.
Unlike poles of a magnet will
a)
Repel
b)
Attract
12.
What is the device seen here?
a)
generator
b)
electric motor
c)
electromagnet
d)
magnet
13.
In large generators in power plants, ___________ rotate inside a coil of wire to produce an electric current.
a)
Wind
b)
Water
c)
Magnets
d)
Circuits
14.
How many Volts would it take to push 1 Amp through a resistance of 1 Ohm
a)
10 volts
b)
1 volt
c)
48 volts
d)
5 volts
15.
What size resistor would produce a 3 Amp current flow with a 12 Volt battery
a)
1 Ohm
b)
3 Ohms
c)
4 Ohms
d)
12 Ohms
16.
This is an example of a _______ circuit
a)
open
b)
series
c)
parallel
d)
square
17.
This is an example of a ______ circuit
a)
Series
b)
Parallel
c)
Open
d)
Dihexihedral
18.
What is current measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
19.
What is Resistance?
a)
The flow of electrons
b)
Electric potential difference
c)
A battery
d)
The ability to reduce the flow of electrons
20.
Electricity that flows in a closed path is called a
a)
path
b)
current
c)
circuit
d)
light
21.

Voltage divided by Resistance

(V / R)

a)

Current

b)

Power

c)

Ohms

d)

Watts

22.
When a force moves an object, the action is called ______.
a)
energy
b)
work
c)
force
d)
circuit
23.

A circuit is made of three parts, the part that converts the electrical energy into something else is called the...

a)

Power supply

b)

Load

c)

Conducting path

d)

Series circuit

24.
How is electrical energy usually produced?
a)
Fuel is burned to produce smoke, which turns a turbine.
b)
Fuel is burned to heat water and produce steam, which turns a turbine.
c)
Hot fuel is placed in water to produce steam, which then turns a turbine.
d)
A turbine blows hot steam onto fuel, which heats it up and produces electricity.
25.
What process is used to convert motion from a turbine into electricity?
a)
electric voltage generation
b)
electromechanical fusion
c)
electromagnetic induction
d)
electric induction
26.

What is the miximum theoretic efficiency of a wind turbine?

a)

100%

b)

85%

c)

60%

d)

10$

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