Approximately what % of all commercial energy used in the U.S. is wasted? (within 5%)

84%

The “hybrid” part of a hybrid car means what?

It runs on fuel of some kind and a battery provides some power.

Why is a straw bale house energy efficient?

superinsulated

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

This type of bulb uses one fourth the amount of energy and lasts longer than the conventional incandescent bulb.

Compact fluorescent

All of these are active solar methods EXCEPT:

A.Photovoltaic cells

B.Solar cookers

C.Solar cell roof panel

B. Solar cooker is passive

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

What two things are produced by cogeneration?

Heat and power, such as steam and electricity.

Considering the efficiency of each step in the energy conversion process will help you to determine the:

Net Energy Efficiency

What does R value mean?

Measure of resistance to heat flow.

Which is a more efficient water heater – electric or natural gas?

Natural gas, especially if it is a tankless instant water heater

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!

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

Wood, charcoal, and manure are all examples of what kind of fuel?

Biofuel or biomass

Where would you NOT place a wind farm?

A.North and South Dakota

B.Around the Great Lakes

C.In Florida

C. In Florida

Hydrogen power sounds GREAT – just get hydrogen from water, right? What is the big problem?

Splitting water requires ENERGY

In a fuel cell, what two gasses combine to produce electricity?

Hydrogen and oxygen

Which country is NOT a good candidate for geothermal energy use?

A.Greenland

B.Iceland

C.Japan

A. Greenland

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!

Migrating birds and local bat colonies can be particularly harmed by this method of renewable resource collection.

Windmills

Planting deciduous trees on the south side of your house is a strategy found under the category of: _______ solar

passive

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