Question 1

Which of these is not a portion of a Solar Two solar thermal storage unit?

Accepted Answer

A)  Turbine
B)  Control rod
C)  Central receiver
D)  Condensor
E)  HeliostatF) A) and C)
G) A) and B)

Question 2

Which of these elements would result in an electron rich semiconductor when added to silicon?

Accepted Answer

A)  B
B)  Al
C)  Ge
D)  C
E)  PF) None of the above
G) B) and C)

Question 3

Which of these is a cleaner alternate fuel source to fossil fuels?

Accepted Answer

A)  Solar
B)  Wind
C)  Hydroelectric
D)  Geothermal
E)  All of theseF) A) and B)
G) A) and E)

Question 4

Which of theses items will not help in the conservation of household energy?

Accepted Answer

A)  Electric heaters
B)  Lowering thermostats
C)  Using fluorescent lighting
D)  Installing double-pane windows
E)  All of these will conserve energy.F) B) and E)
G) A) and B)

Question 5

Which process is represented in the equation?
​
Energy + 2H2O → 2H2 + O2

Accepted Answer

A)  Photosynthesis
B)  Electrolysis
C)  Photovoltaic cell
D)  Respiration
E)  CombustionF) B) and D)
G) All of the above

Question 6

Which of these is not a problem associated with utilizing solar energy?

Accepted Answer

A)  Low concentration of solar energy supply.
B)  Low efficiency of solar cells for collecting solar energy
C)  High cost associated with constructing solar technologies.
D)  Hazardous wastes associated with solar cell decomposition.
E)  Both C and DF) A) and E)
G) All of the above

Question 7

Which of these are systems that utilize solar thermal energy?
I. Solar power tower
II. Parabolic trough
III. Dish engine

Accepted Answer

A)  I only
B)  II only
C)  I, II and III
D)  I and II
E)  I and IIIF) None of the above
G) All of the above

Question 8

How many square meters of photovoltaic cells would be required to provide sufficient energy to light a 60 W computer monitor? Photovoltaic cells are 15% efficient in converting 1000 W\m2 of solar energy to electricity.

Accepted Answer

A)  0.40 m2
B)  2.5 m2
C)  14 m2
D)  9 m2
E)  400 m2F) A) and E)
G) A) and C)

Question 9

Which of these elements would result in an electron poor semiconductor when added to silicon?

Accepted Answer

A)  As
B)  Sb
C)  P
D)  B
E)  SeF) C) and D)
G) All of the above

Question 10

In which of these regions does hydroelectric power have the greatest potential for growth?

Accepted Answer

A)  Mountainous regions
B)  Desert regions
C)  Developing countries
D)  United States
E)  Island nationsF) C) and D)
G) A) and C)

Question 11

Which of these is the most significant problem with solar energy , apart from low concentrations ?

Accepted Answer

A)  Low levels of processing.
B)  Intermittence of sunlight.
C)  Inefficient storage.
D)  High cost of collecting.
E)  Lack of sufficient collecting systems.F) A) and D)
G) C) and D)

Question 12

Which of these heating sources is most effective in heating homes ?

Accepted Answer

A)  Solar energy
B)  Electricity
C)  Hydropower
D)  Geothermal
E)  Natural gasF) C) and D)
G) A) and D)

Question 13

Which of these is the most significant problem with biomass energy?

Accepted Answer

A)  Inefficient
B)  Global warming
C)  Insufficient land
D)  Expensive to produce
E)  Hazardous wastesF) A) and E)
G) A) and D)

Question 14

What percentage of energy is lost by converting from natural gas to electricity to heat a home?

Accepted Answer

A)  10%
B)  30%
C)  50%
D)  70%
E)  90%F) B) and C)
G) All of the above

Question 15

Which of these forms of energy use heliostats to focus the suns energy?

Accepted Answer

A)  Solar thermal
B)  Wind
C)  Hydroelectric
D)  Biomass
E)  GeothermalF) None of the above
G) A) and E)

Question 16

Which of these statements about the Sun is incorrect ?

Accepted Answer

A)  The Sun radiates 1026 watts of energy constantly into space.
B)  The earth receives approximately 1 part per billion of the Sun's energy.
C)  The main problem with solar energy is that it is not energetic enough for use.
D)  Using solar energy is a problem because of its relatively low concentration.
E)  All of these are correct statements.F) B) and E)
G) None of the above

Question 17

Which of these is the correct notation for indicating that a semiconductor is electron rich when combined with a dopant such as Arsenic ?

Accepted Answer

A)  e-type
B)  s-type
C)  n-type
D)  n\p-type
E)  ( − ) typeF) A) and E)
G) All of the above

Question 18

Space heating accounts for approximately _____% of energy use in an average U. S. household.

Accepted Answer

A)  10%
B)  20%
C)  30%
D)  41.5%
E)  50%F) B) and D)
G) A) and E)

Question 19

​ The efficiency of a solar system which uses a focusing system covering 135 m2 and produces 41.0 kW of power is approximately _____ considering the solar power available is 1000 W\m2.

Accepted Answer

A)  ​ 1.8%
B)  ​ 14%
C)  ​ 30 %
D)  ​ 55%
E)  ​ 94%F) B) and D)
G) A) and B)

Question 20

Transportation in the U.S.  accounts for what percentage of energy consumption?

Accepted Answer

A)  10%
B)  25%
C)  50%
D)  75%
E)  85%F) D) and E)
G) None of the above

Exam 10: Energy for Tomorrow: Solar and Other Renewable Energy Sources

Space heating accounts for approximately _____% of energy use in an average U. S. household.

Correct AnswerverifiedShow Answer

Which of these are systems that utilize solar thermal energy? I. Solar power tower II. Parabolic trough III. Dish engine

Correct AnswerverifiedShow Answer

Which of these is not a portion of a Solar Two solar thermal storage unit?

Correct AnswerverifiedShow Answer

​ The efficiency of a solar system which uses a focusing system covering 135 m2 and produces 41.0 kW of power is approximately _____ considering the solar power available is 1000 W\m2.

Correct AnswerverifiedShow Answer

Which of these statements about the Sun is incorrect ?

Correct AnswerverifiedShow Answer

Which of these forms of energy use heliostats to focus the suns energy?

Correct AnswerverifiedShow Answer

Which of these is a cleaner alternate fuel source to fossil fuels?

Correct AnswerverifiedShow Answer

Which of these is the most significant problem with biomass energy?

Correct AnswerverifiedShow Answer

How many square meters of photovoltaic cells would be required to provide sufficient energy to light a 60 W computer monitor? Photovoltaic cells are 15% efficient in converting 1000 W\m2 of solar energy to electricity.

Correct AnswerverifiedShow Answer

What percentage of energy is lost by converting from natural gas to electricity to heat a home?

Correct AnswerverifiedShow Answer

Which of these elements would result in an electron rich semiconductor when added to silicon?

Correct AnswerverifiedShow Answer

Which of these is the correct notation for indicating that a semiconductor is electron rich when combined with a dopant such as Arsenic ?

Correct AnswerverifiedShow Answer

Which process is represented in the equation? ​ Energy + 2H2O → 2H2 + O2

Correct AnswerverifiedShow Answer

Which of theses items will not help in the conservation of household energy?

Correct AnswerverifiedShow Answer

Transportation in the U.S. accounts for what percentage of energy consumption?

Correct AnswerverifiedShow Answer

Which of these is not a problem associated with utilizing solar energy?

Correct AnswerverifiedShow Answer

Which of these elements would result in an electron poor semiconductor when added to silicon?

Correct AnswerverifiedShow Answer

In which of these regions does hydroelectric power have the greatest potential for growth?

Correct AnswerverifiedShow Answer

Which of these heating sources is most effective in heating homes ?

Correct AnswerverifiedShow Answer

Which of these is the most significant problem with solar energy , apart from low concentrations ?

Correct AnswerverifiedShow Answer

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The efficiency of a solar system which uses a focusing system covering 135 m² and produces 41.0 kW of power is approximately _____ considering the solar power available is 1000 W\m².

Correct Answer
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Correct Answer
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How many square meters of photovoltaic cells would be required to provide sufficient energy to light a 60 W computer monitor? Photovoltaic cells are 15% efficient in converting 1000 W\m² of solar energy to electricity.

Correct Answer
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Which process is represented in the equation? Energy + 2H₂O → 2H₂ + O₂

Correct Answer
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