Ethanol and Fermentation Quiz
Name:
Hour
C. Kohn, Waterford WI
Date:
Score
/19
1. Ethanol is created through which of the following processes?
a. Transesterification b. Respiration c. Fermentation d. All of the above
2. How does the ethanol molecule change if we change the source it is made from?
a. Corn ethanol molecules burn more cleanly than cellulose ethanol molecules
b. Cellulose ethanol molecules burn more cleanly than corn ethanol molecules
c. Corn ethanol molecules burn more completely than cellulose ethanol molecules
d. Cellulose ethanol molecules burn more completely than corn ethanol molecules
e. None of the above; ethanol molecules are the same regardless of their source
3. Which of the following is the chemical formula for ethanol?
a. CH3CH2OH b. C8H18 c. C6H12O6 d. Any of these could be ethanol depending on the source
4. One molecule of sugar will yield ___ molecules of ethanol and ___ molecules of CO2
a. 1;1 b. 2;2 c. 1;3 d. 3;1
5. ____________ energy goes into ethanol to produce it than you get when you combust it.
a. Less b. More c. The same amount of
6. An octane rating is…
a. A measure of how much energy is contained in a fuel
b. A measure of how much a fuel pollutes
c. A measure of the emissions of a fuel
d. A measure of how efficiently a fuel combusts
7. Cellulosic ethanol could reduce greenhouse gas emissions by what percentage?
a. 10-20% b. 30-40% c. 50-60% d. 80-90%
8. The sinking of an ethanol tanker ship (the Bow Mariner) in 2004 caused what major environmental problems?
a. Acid Rain b. A dead zone off the coast of Virginia c. Polluted groundwater d. None
9. Which of the following is the easiest to convert into ethanol?
a. Cellulosic b. Corn grain c. Sugar Cane d. None of the above; all require the same process
10. A gallon of ethanol contains ____%_ ________________ energy than a gallon of gasoline.
a. 5% more b. 5% less c. 34% more d. 34% less
11. A gallon of ethanol has ________________ octane rating compared to gasoline.
a. A higher b. A lower c. The same d. A wildly varying
Copyright 2012 by Craig Kohn, Agricultural Sciences, Waterford WI. This source may be freely used and distributed provided the author is cited.
12. Why is most of the ethanol produced in the US made from corn grain?
a. It is the easiest crop to ferment into ethanol
b. It is the most abundant source of ethanol on the planet
c. It is easier to ferment than cellulosic ethanol but more abundant than sugar cane in the US
d. All of the above
13. The process of fermenting glucose produces what products?
a. Ethanol, CO2, and water
b. CO2 and water
c. Ethanol and CO2
d. Just ethanol
e. Just CO2
14. In ethanol, a feedstock is…
a. The ultimate source of ethanol (e.g. corn or sugar cane)
b. The type of organism used for fermentation
c. The method in which an ethanol crop is harvested
d. The byproducts of fermentation that are fed to cattle
15. In the US, most ethanol is made from…
a. Sugar Cane b. Cellulosic Sources c. Corn d. Waste vegetable oil
16. Why doesn’t the US produce more of their ethanol from sugar cane?
a. It is not as easy to ferment
b. It creates more expensive ethanol than corn
c. It doesn’t really grow in the US
d. All of the above
17. Why is cellulosic ethanol considered the most promising source of biofuel in the future?
a. It is the easiest to ferment
b. It is the easiest to grow
c. It is the most abundant potential fuel source on the planet
d. All of the above
18. Which of the following would be a cellulosic crop for ethanol?
a. Corn grain b. Sugar cane c. Switchgrass d. All of the above
19. Ethanol pollutes the same as gasoline and takes more energy to produce than you get out of it when
combusted.
a. True b. False
Copyright 2012 by Craig Kohn, Agricultural Sciences, Waterford WI. This source may be freely used and distributed provided the author is cited.