Quiz about Energy Efficiency Quiz

Question 1

What are the two main ways to make electricity from solar energy?

Accepted Answer

Photovoltaic systems and thermal energy

Answer

Wind turbines and thermal energy

Answer

Hydroelectric power and photovoltaic systems

Answer

Geothermal energy and wind turbines

Question 2

What does the term "photovoltaic" mean?

Accepted Answer

Light and voltage

Answer

Light and sound

Answer

Light and heat

Answer

Heat and voltage

Question 3

What is the main element used in the making of solar cells?

Accepted Answer

Silicon

Answer

Phosphorous

Answer

Boron

Answer

Carbon

Question 4

What is the average size of a residential PV system installed?

Accepted Answer

1.1 kilowatts

Answer

0.5 kilowatts

Answer

2.5 kilowatts

Answer

3.4 kilowatts

Question 5

What is the average size of a utility-scale PV system?

Accepted Answer

3.4 megawatts

Answer

1.1 megawatts

Answer

2.4 megawatts

Answer

4.5 megawatts

Question 6

What happens when the PV cell is placed in the sun?

Accepted Answer

The radiant energy excites the free electrons

Answer

The radiant energy excites the protons

Answer

The radiant energy excites the neutrons

Answer

The radiant energy excites the atoms

Question 7

What is the function of a load in a PV cell circuit?

Accepted Answer

To use energy

Answer

To store energy

Answer

To transfer energy

Answer

To produce light

Question 8

What is the purpose of adding phosphorous to the top of the silicon wafer in a PV cell?

Accepted Answer

To give it a negative character

Answer

To give it a positive character

Answer

To give it a neutral character

Answer

To give it a magnetic character

Question 9

What is the purpose of adding boron to the bottom of the silicon wafer in a PV cell?

Accepted Answer

To give it a positive character

Answer

To give it a negative character

Answer

To give it a neutral character

Answer

To give it a magnetic character

Question 10

What is the function of the p-n junction in a PV cell?

Accepted Answer

To separate the positive and negative charges

Answer

To combine the positive and negative charges

Answer

To store energy

Answer

To transfer energy

Question 11

What is the main advantage of photovoltaic systems over other energy systems?

Accepted Answer

They produce electricity silently and instantly

Answer

They have mechanical parts that wear out

Answer

They require a lot of maintenance

Answer

They are expensive to install

Question 12

What is the purpose of connecting many PV cells together?

Accepted Answer

To produce enough usable electricity

Answer

To increase the voltage

Answer

To increase the current

Answer

To store more energy

Question 13

Which of the following systems uses mirrors to concentrate sunlight onto receivers located just above the mirrors?

Accepted Answer

Linear concentrating systems

Answer

Parabolic trough systems

Answer

Dish/engine systems

Answer

Solar power towers

Question 14

In a parabolic trough system, what is the purpose of the fluid circulating inside the pipe?

Accepted Answer

To transfer energy to a heat exchanger

Answer

To cool down the mirrors

Answer

To reflect sunlight

Answer

To generate electricity directly

Question 15

Parabolic trough systems are more expensive to manufacture than linear Fresnel reflector systems.

Accepted Answer

True

Answer

False

Question 16

Which solar power system consists of a large field of sun-tracking mirrors called heliostats?

Accepted Answer

Solar power towers

Answer

Linear concentrating systems

Answer

Parabolic trough systems

Answer

Dish/engine systems

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