Question 1

​Solar thermal power plants are the most direct conversion of solar energy into electricity.

Accepted Answer

A) True 
 B)False  False

Question 2

Compared to a fixed array that is manually adjusted each season to face the sun, dual-axis trackers _____ energy over the course of the year.

Accepted Answer

A)  can produce 30%-35% more 
B)  produce approximately 25% less 
C)  produce at least twice as much 
D)  significantly reduce the production o​f 
A)  can produce 30%-35% more 
B)  produce approximately 25% less 
C)  produce at least twice as much 
D)  significantly reduce the production o​f A

Question 3

​A photovoltaic array can interact with a utility grid without an inverter.

Accepted Answer

A) True 
 B)False  False

Question 4

Batteries for off-grid systems have batteries that last _____ .

Accepted Answer

A)  approximately 10-12 years 
B)  no more than 5 years 
C)  more than 15 years at minimum 
D)  only 7-9 years on average 
A)  approximately 10-12 years 
B)  no more than 5 years 
C)  more than 15 years at minimum 
D)  only 7-9 years on average

Question 5

A(n) _____ is one in which some built-in asymmetry draws the excited electrons away and delivers them to an external circuit before they can relax.

Accepted Answer

A)  electromagnetic device 
B)  nuclear power plant 
C)  photovoltaic device 
D)  conventional power plant 
A)  electromagnetic device 
B)  nuclear power plant 
C)  photovoltaic device 
D)  conventional power plant

Question 6

​Photovoltaic systems suffer numerous losses that reduce the actual electricity produced.

Accepted Answer

A) True 
 B)False

Question 7

​All photovoltaic cells made of silicon produce a voltage of about 0.5 volts per cell regardless of cell size.

Accepted Answer

A) True 
 B)False

Question 8

​Off-grid systems are typically sized smaller than grid-tied systems.

Accepted Answer

A) True 
 B)False

Question 9

​When a material absorbs the electromagnetic energy of light, the energy excites electrons from their usual positions in atoms to higher energy states, where they are more able to move around.

Accepted Answer

A) True 
 B)False

Question 10

Which of the following household items is likely to have the most power consumption in a typical day?

Accepted Answer

A)  electric clock 
B)  iron 
C)  table fan 
D)  TV 
A)  electric clock 
B)  iron 
C)  table fan 
D)  TV

Question 11

Tracking arrays _____ .

Accepted Answer

A)  expose the greatest possible area to the sun's energy 
B)  increase reflection caused by oblique illumination 
C)  can be placed on a pole 4 feet above the ground 
D)  cannot reposition in the absence of sunlight 
A)  expose the greatest possible area to the sun's energy 
B)  increase reflection caused by oblique illumination 
C)  can be placed on a pole 4 feet above the ground 
D)  cannot reposition in the absence of sunlight

Question 12

Photovoltaic modules usually consist of _____ individual cells, each connected in series to its neighbors, to create a total voltage of about _____ volts.

Accepted Answer

A)  18-36; 36-72 
B)  24-36; 12-60 
C)  36-72; 18-36 
D)  12-60; 24-36 
A)  18-36; 36-72 
B)  24-36; 12-60 
C)  36-72; 18-36 
D)  12-60; 24-36

Question 13

​Monocrystalline cells are the least expensive to manufacture and contain the least amount of embodied energy.

Accepted Answer

A) True 
 B)False

Question 14

Which of the following statements is true regarding fixed-mount photovoltaic arrays?

Accepted Answer

A)  They have moving parts that need lubrication, routine maintenance, and replacement of worn gears. 
B)  Energy production varies greatly for sites with morning and evening shade. 
C)  They permit building-integrated systems such as photovoltaic roofing shingles. 
D)  They are not recommended for off-grid applications. 
A)  They have moving parts that need lubrication, routine maintenance, and replacement of worn gears. 
B)  Energy production varies greatly for sites with morning and evening shade. 
C)  They permit building-integrated systems such as photovoltaic roofing shingles. 
D)  They are not recommended for off-grid applications.

Question 15

_____ dramatically alters the electrical behavior of silicon in the production of electricity.

Accepted Answer

A)  Sand 
B)  Doping 
C)  Sunlight 
D)  Pressure 
A)  Sand 
B)  Doping 
C)  Sunlight 
D)  Pressure

Question 16

In practice, photovoltaic systems suffer numerous losses that reduce the actual electricity produced by _____ of the potential power output.

Accepted Answer

A)  no more than 5% 
B)  approximately 15% 
C)  as much as 20% or more 
D)  no less than 50% 
A)  no more than 5% 
B)  approximately 15% 
C)  as much as 20% or more 
D)  no less than 50%

Question 17

​The most commonly used semiconductor is silicon.

Accepted Answer

A) True 
 B)False

Question 18

Monocrystalline cells are the most efficient of all silicon cells, converting _____ of the arriving solar energy into electricity.

Accepted Answer

A)  15%-20% or mor​e 
B)  at least 25% 
C)  25%-30% 
D)  no less than 30% 
A)  15%-20% or mor​e 
B)  at least 25% 
C)  25%-30% 
D)  no less than 30%

Question 19

​Photovoltaics is the ______ .

Accepted Answer

A)  indirect conversion of sunlight into electricity 
B)  direct conversion of sunlight into electricity 
C)  focusing of the sun's energy to boil water, create steam, and drive turbines 
D)  production of electricity in a similar fashion as conventional power plants 
A)  indirect conversion of sunlight into electricity 
B)  direct conversion of sunlight into electricity 
C)  focusing of the sun's energy to boil water, create steam, and drive turbines 
D)  production of electricity in a similar fashion as conventional power plants

Question 20

​The top surface of the p-type semiconductor is textured and coated to reduce reflection.

Accepted Answer

A) True 
 B)False

Solar thermal power plants are the most direct conversion of solar energy into electricity.

Compared to a fixed array that is manually adjusted each season to face the sun, dual-axis trackers _____ energy over the course of the year.

A photovoltaic array can interact with a utility grid without an inverter.

Batteries for off-grid systems have batteries that last _____ .

A(n) _____ is one in which some built-in asymmetry draws the excited electrons away and delivers them to an external circuit before they can relax.

Photovoltaic systems suffer numerous losses that reduce the actual electricity produced.

All photovoltaic cells made of silicon produce a voltage of about 0.5 volts per cell regardless of cell size.

Off-grid systems are typically sized smaller than grid-tied systems.

When a material absorbs the electromagnetic energy of light, the energy excites electrons from their usual positions in atoms to higher energy states, where they are more able to move around.

Which of the following household items is likely to have the most power consumption in a typical day?

Tracking arrays _____ .

Photovoltaic modules usually consist of _ individual cells, each connected in series to its neighbors, to create a total voltage of about _ volts.

Monocrystalline cells are the least expensive to manufacture and contain the least amount of embodied energy.

Which of the following statements is true regarding fixed-mount photovoltaic arrays?

_____ dramatically alters the electrical behavior of silicon in the production of electricity.

In practice, photovoltaic systems suffer numerous losses that reduce the actual electricity produced by _____ of the potential power output.

The most commonly used semiconductor is silicon.

Monocrystalline cells are the most efficient of all silicon cells, converting _____ of the arriving solar energy into electricity.

Photovoltaics is the ______ .

The top surface of the p-type semiconductor is textured and coated to reduce reflection.

Introduction to Green Building

Building Materials

Passive Solar Design

Alternative Construction

Energy

Solar Hot Water

Wind Power

Hydropower

Biomass

Nonsolar Renewable Energy

Filters

Exam 7: Solar Electricity

​Solar thermal power plants are the most direct conversion of solar energy into electricity.

Compared to a fixed array that is manually adjusted each season to face the sun, dual-axis trackers _____ energy over the course of the year.

​A photovoltaic array can interact with a utility grid without an inverter.

Batteries for off-grid systems have batteries that last _____ .

A(n) _____ is one in which some built-in asymmetry draws the excited electrons away and delivers them to an external circuit before they can relax.

​Photovoltaic systems suffer numerous losses that reduce the actual electricity produced.

​All photovoltaic cells made of silicon produce a voltage of about 0.5 volts per cell regardless of cell size.

​Off-grid systems are typically sized smaller than grid-tied systems.

​When a material absorbs the electromagnetic energy of light, the energy excites electrons from their usual positions in atoms to higher energy states, where they are more able to move around.

Which of the following household items is likely to have the most power consumption in a typical day?

Tracking arrays _____ .

Photovoltaic modules usually consist of _____ individual cells, each connected in series to its neighbors, to create a total voltage of about _____ volts.

​Monocrystalline cells are the least expensive to manufacture and contain the least amount of embodied energy.

Which of the following statements is true regarding fixed-mount photovoltaic arrays?

_____ dramatically alters the electrical behavior of silicon in the production of electricity.

In practice, photovoltaic systems suffer numerous losses that reduce the actual electricity produced by _____ of the potential power output.

​The most commonly used semiconductor is silicon.

Monocrystalline cells are the most efficient of all silicon cells, converting _____ of the arriving solar energy into electricity.

​Photovoltaics is the ______ .

​The top surface of the p-type semiconductor is textured and coated to reduce reflection.

Introduction to Green Building

Building Materials

Passive Solar Design

Alternative Construction

Energy

Solar Hot Water

Wind Power

Hydropower

Biomass

Nonsolar Renewable Energy

Filters

Solar thermal power plants are the most direct conversion of solar energy into electricity.

A photovoltaic array can interact with a utility grid without an inverter.

Photovoltaic systems suffer numerous losses that reduce the actual electricity produced.

All photovoltaic cells made of silicon produce a voltage of about 0.5 volts per cell regardless of cell size.

Off-grid systems are typically sized smaller than grid-tied systems.

When a material absorbs the electromagnetic energy of light, the energy excites electrons from their usual positions in atoms to higher energy states, where they are more able to move around.

Photovoltaic modules usually consist of _ individual cells, each connected in series to its neighbors, to create a total voltage of about _ volts.

Monocrystalline cells are the least expensive to manufacture and contain the least amount of embodied energy.

The most commonly used semiconductor is silicon.

Photovoltaics is the ______ .

The top surface of the p-type semiconductor is textured and coated to reduce reflection.