Download - Approximately what % of all commercial energy used in the U.S. is wasted? (within 5%) 84%
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Approximately what % of all commercial energy used in the U.S. is wasted? (within 5%)
84%
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The “hybrid” part of a hybrid car means what?
It runs on fuel of some kind and a battery provides some power.
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Why is a straw bale house energy efficient?
superinsulated
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Rank these 3 methods of net energy efficiency from Least to Most efficient:
A.Oil furnace
B.Passive solar
C.Typical wood stove
C, A, B
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This type of bulb uses one fourth the amount of energy and lasts longer than the conventional incandescent bulb.
Compact fluorescent
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All of these are active solar methods EXCEPT:
A.Photovoltaic cells
B.Solar cookers
C.Solar cell roof panel
B. Solar cooker is passive
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All of the following are disadvantages of hydroelectic power EXCEPT:
A.High carbon dioxide from biomass decay in reservoirs.
B.Long life span.
C.Floods natural areas.
B. Long life span
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What two things are produced by cogeneration?
Heat and power, such as steam and electricity.
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Considering the efficiency of each step in the energy conversion process will help you to determine the:
Net Energy Efficiency
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What does R value mean?
Measure of resistance to heat flow.
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Which is a more efficient water heater – electric or natural gas?
Natural gas, especially if it is a tankless instant water heater
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All of these are reasons why we (US) still waste so much energy Except:
A.Energy is relatively cheap.
B.Lack of tax breaks for energy efficiency.
C.Lack of information about energy saving devices.
Trick question – all are reasons!
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Turbines can be used to produce electricity by being connected to all of the following EXCEPT:
A.Hydro dam
B.Hydrogen fuel cell
C.Tidal power
B. Hydrogen fuel cell
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Wood, charcoal, and manure are all examples of what kind of fuel?
Biofuel or biomass
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Where would you NOT place a wind farm?
A.North and South Dakota
B.Around the Great Lakes
C.In Florida
C. In Florida
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Hydrogen power sounds GREAT – just get hydrogen from water, right? What is the big problem?
Splitting water requires ENERGY
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In a fuel cell, what two gasses combine to produce electricity?
Hydrogen and oxygen
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Which country is NOT a good candidate for geothermal energy use?
A.Greenland
B.Iceland
C.Japan
A. Greenland
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One of the text Spotlights discussed a technique under study to produce hydrogen for fuel from what unusual source?
Green algae – you cut off their supply of sulfur and oxygen, they switched to hydrogen producing metabolism!
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Migrating birds and local bat colonies can be particularly harmed by this method of renewable resource collection.
Windmills
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Planting deciduous trees on the south side of your house is a strategy found under the category of: _______ solar
passive
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If you own a small business, you can get a bigger tax break and a greater depreciation break by buying:
A.A hybrid prius or SUV
B.A Hummer or Excursion
C.A solar powered cart
B – Hummer or other SUV/truck