Question 1

Which of these is currently the most cost competitive at creating fuel to replace fossil fuels?
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 III

Question 2

Which of the following has not been used as a fuel for a vehicle?

Accepted Answer

A)  Hydrogen
B)  Ethanol
C)  Solar power
D)  Fuel cell
E)  None of the above

Question 3

Which of these is not a commercial application of photovoltaic cells?

Accepted Answer

A)  Night lights
B)  Highway call boxes
C)  Watches
D)  Cell phones
E)  Calculators

Question 4

What percentage of energy is conserved by heating a house directly with natural gas?

Accepted Answer

A)  10-20%
B)  30-40%
C)  50-60%
D)  70-90%
E)  95-98%

Question 5

Which of these is not an application where photovoltaic cells are used?
I. Solar cars
II. Battery chargers
III. Satspace industry
IV. Calculators

Accepted Answer

A)  I and II
B)  I and III
C)  I, II and III
D)  I, III and IV
E)  all of these  use photovoltaic cells

Question 6

Which of these forms of power is the worlds' most utilized alternate energy source?

Accepted Answer

A)  Geothermal
B)  Hydroelectric
C)  Wind
D)  Biomass
E)  Nuclear

Question 7

Solar power towers use Sun-tracking mirrors called _________.

Accepted Answer

A)  reflectometers
B)  heliostats
C)  receivers
D)  condensors

Question 8

Which of these household appliances consumes the greatest amount of electricity per year?

Accepted Answer

A)  Television
B)  Stereo
C)  Clothes dryer
D)  Coffee maker
E)  Dishwasher

Question 9

How many square meters of photovoltaic cells would be required to provide sufficient energy to light a 100 W light bulb? Photovoltaic cells are 15% efficient in converting 1000 W\m2 of solar energy to electricity.

Accepted Answer

A)  6.6 × 10 − 1 m2
B)  15 m2
C)  67 m2
D)  200 m2
E)  275 m2

Question 10

Which of these methods is utilized for the storage of solar energy by forming chemical bonds?

Accepted Answer

A)  Replication
B)  Photosynthesis
C)  Electrolysis
D)  Combustion
E)  Photovoltaic cells

Question 11

Which of these is the most common type of semiconductor found in photovoltaic cells?

Accepted Answer

A)  Arsenic
B)  Carbon
C)  Uranium
D)  Silicon
E)  Hydrogen

Question 12

Which of these is not a problem associated with photovoltaic cells?
I. The cells are very inefficient.
II. Semiconductors are expensive to construct.
III. The cells must absorb large amounts of energy for useful applications.

Accepted Answer

A)  I only
B)  III only
C)  I and II
D)  II and III
E)  I, II and III

Question 13

Which of these is a disadvantage of nuclear power as an alternative energy source?
I. Limited amounts of U-235
II. Radioactive wastes
III. Smog production

Accepted Answer

A)  II only
B)  II and III
C)  I and III
D)  I and II
E)  I, II and III

Question 14

Which of these is not a problem associated with geothermal energy?

Accepted Answer

A)  It has limited availability.
B)  Vented steam usually contains sulfurous and ammonia gases.
C)  Global warming results because of the high levels of CO2 produced.
D)  Condensed steam from the earth's crust is corrosive to mechanical parts.
E)  All of these are problems with geothermal energy.

Question 15

Which of these methods is not a mechanism currently being explored for storing solar energy?

Accepted Answer

A)  Light capture
B)  Heat storage
C)  Battery storage
D)  Creation of chemical bonds
E)  All of these are acceptable methods.

Question 16

Which of these is a disadvantage of wind power?
I. Wind farms use large portions of land which can not be used or other purposes.
II. Wind farms are undependable since winds are not always there when needed.
III. Wind power generation is extremely expensive and not competitive with other fuels.

Accepted Answer

A)  I only
B)  II only
C)  I and III
D)  I and II
E)  I, II and III

Question 17

Which of these accounts for the largest amount of household energy consumption?

Accepted Answer

A)  Water heating
B)  Air-conditioning
C)  Space-heating
D)  Appliances
E)  Television

Question 18

Which of these is product of the combustion of hydrogen?

Accepted Answer

A)  Methane
B)  Water
C)  Oxygen
D)  Carbon dioxide
E)  More than one answer is correct

Question 19

Which of these is the correct notation for indicating that a semiconductor is electron deficient?

Accepted Answer

A)  e-type
B)  (+) type
C)  n-type
D)  n\p-type
E)  p-type

Question 20

Photovoltaic systems take solar energy and convert it into ____.

Accepted Answer

A)  heat
B)  electricity
C)  electrons
D)  solar thermal power
E)  steam

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

Which of these is a disadvantage of nuclear power as an alternative energy source? I. Limited amounts of U-235 II. Radioactive wastes III. Smog production

Correct AnswerverifiedShow Answer

Which of these methods is not a mechanism currently being explored for storing solar energy?

Correct AnswerverifiedShow Answer

Which of these forms of power is the worlds' most utilized alternate energy source?

Correct AnswerverifiedShow Answer

Which of the following has not been used as a fuel for a vehicle?

Correct AnswerverifiedShow Answer

Which of these is not a commercial application of photovoltaic cells?

Correct AnswerverifiedShow Answer

Solar power towers use Sun-tracking mirrors called _________.

Correct AnswerverifiedShow Answer

Which of these methods is utilized for the storage of solar energy by forming chemical bonds?

Correct AnswerverifiedShow Answer

What percentage of energy is conserved by heating a house directly with natural gas?

Correct AnswerverifiedShow Answer

Which of these is a disadvantage of wind power? I. Wind farms use large portions of land which can not be used or other purposes. II. Wind farms are undependable since winds are not always there when needed. III. Wind power generation is extremely expensive and not competitive with other fuels.

Correct AnswerverifiedShow Answer

Which of these is the correct notation for indicating that a semiconductor is electron deficient?

Correct AnswerverifiedShow Answer

Which of these is the most common type of semiconductor found in photovoltaic cells?

Correct AnswerverifiedShow Answer

Which of these is currently the most cost competitive at creating fuel to replace fossil fuels? I. Solar power tower II. Parabolic trough III. Dish engine

Correct AnswerverifiedShow Answer

Which of these accounts for the largest amount of household energy consumption?

Correct AnswerverifiedShow Answer

Which of these is product of the combustion of hydrogen?

Correct AnswerverifiedShow Answer

Which of these is not a problem associated with photovoltaic cells? I. The cells are very inefficient. II. Semiconductors are expensive to construct. III. The cells must absorb large amounts of energy for useful applications.

Correct AnswerverifiedShow Answer

How many square meters of photovoltaic cells would be required to provide sufficient energy to light a 100 W light bulb? Photovoltaic cells are 15% efficient in converting 1000 W\m2 of solar energy to electricity.

Correct AnswerverifiedShow Answer

Which of these is not a problem associated with geothermal energy?

Correct AnswerverifiedShow Answer

Photovoltaic systems take solar energy and convert it into ____.

Correct AnswerverifiedShow Answer

Which of these household appliances consumes the greatest amount of electricity per year?

Correct AnswerverifiedShow Answer

Which of these is not an application where photovoltaic cells are used? I. Solar cars II. Battery chargers III. Satspace industry IV. Calculators

Correct AnswerverifiedShow Answer

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How many square meters of photovoltaic cells would be required to provide sufficient energy to light a 100 W light bulb? Photovoltaic cells are 15% efficient in converting 1000 W\m² of solar energy to electricity.

Correct Answer
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