Title: Final Exam
Course: BFM 201 Ethanol Production > Section: BFM 201 Ethanol Production

Q: Ethanol can be used to extend gasoline supplies.
- True
- False
A: True

Q: The Clean Air Act of 1970 was amended in 1990 and called for an increase in oxygenates in gasoline.
- True
- False
A: True

Q: One bushel of corn can produce 2.8 gallons of ethanol.
- True
- False
A: True

Q: Corn is a good feedstock to use in ethanol production because of its low starch content.
- True
- False
A: False

Q: DDG’s are not affected by poor quality grain because the grain is sterilized during the cook process.
- True
- False
A: False

Q: The final percent conversion of ethanol can be effected by grind size.
- True
- False
A: True

Q: Finely ground corn is best for the entire ethanol process.
- true
- False
A: False

Q: The most common type of mill used in a dry mill plant is a Roller mill.
- True
- False
A: False

Q: A twin-screw slurry blender is used to mix Yeast.
- True
- False
A: False

Q: Cook water is made up of Backset, new water, and condensate.
- True
- False
A: True

Q: The alpha amylase enzyme’s function is to break down corn starch and to decrease the viscosity of the solution.
- True
- False
A: True

Q: Temperature and pH are closely monitored in the cooking phase of ethanol.
- True
- False
A: True

Q: The cook tube allows additional time to kill off bacteria.
- True
- False
A: True

Q: The flash tank removes heat from the mash.
- True
- False
A: True

Q: A simple iodine test is used to indicate the presence of starch. The test sample turns purple if no starch is present.
- True
- False
A: False

Q: Adding anhydrous ammonia can raise the pH in the slurry tank.
- True
- False
A: True

Q: The Beerwell interrupts direct transfer flow of beer from batch fermentation to continuous distillation process.
- True
- False
A: True

Q: The Beerwell must be cleaned in place between each fermentation batch.
- True
- False
A: False

Q: The temperature of the mash going into the fermenters is 90 degrees F.
- True
- False
A: True

Q: It takes several days for yeast to revive to maximum growth.
- True
- False
A: False

Q: Yeast is single-celled fungi.
- True
- False
A: True

Q: Yeast consume glucose during fermentation and produce Ethanol, CO2 and Heat.
- True
- False
A: True

Q: Yeast produce Lactic and Acetic Acid and these can be harmful to the yeast in high concentrations.
- True
- False
A: True

Q: Urea is a chemical used to clean the fermentation tanks.
- True
- False
A: False

Q: Co-products such as Molasses, Bagasse, and Beverage Wastes can be used in ethanol production.
- True
- False
A: True

Q: Ethanol made from Sugar beets is cost competitive to that of ethanol made from corn.
- True
- False
A: False

Q: It costs less to produce ethanol from cellulosic materials.
- True
- False
A: False

Q: Lignin, a component of biomass, is used in cellulosic ethanol production.
- True
- False
A: False

Q: More high value co-products are produced at a dry mill ethanol facility compared to a wet mill ethanol facility.
- True
- False
A: False

Q: The Beer column and the Side Stripper column in the distillation system use external heat sources.
- True
- False
A: True

Q: Vapor heat from the Beer Column and Side Stripper column are used to heat the Rectifier column.
- True
- False
A: True

Q: The distillation process takes place before the fermentation process.
- True
- False
A: False

Q: Vapor heat from the Beer column and Side Stripper column are used at the rectifier column.
- True
- False
A: True

Q: Distillation only separates 97.2% of the ethanol from water due to development of an azeotrope.
- True
- False
A: True

Q: Side stripper process water goes to the process condensate tank and is reused in the slurry blender as cook water.
- True
- False
A: True

Q: To maintain temperature and purify overhead product in the rectifier, approximately 1/3 of the external reflux is pumped back into the top of the rectifier.
- True
- False
A: False

Q: Anhydrous ethanol is the finished product of the dehydration system.
- True
- False
A: True

Q: Heating, pressure and vacuum are the most important aspects of molecular sieve dehydration.
- True
- False
A: True

Q: Water molecules are larger than the hole in the zeolite bead and therefore are not adsorbed into the hole.
- True
- False
A: False

Q: The evaporation process prepares Distillers Grains for the dryer, reuses thermal energy and reclaims process water.
- True
- False
A: True

Q: Whole stillage is a high value feedstock because it contains fat, protein, fiber and minerals.
- True
- False
A: True

Q: Centrifuge machines use centrifugal force to separate solids out of liquid.
- True
- False
A: True

Q: Grind size does not significantly impact the effectiveness of the centrifuge.
- True
- False
A: False

Q: Thin stillage that is discharged from the centrifuge is made up of 4 – 5% solids.
- True
- False
A: True

Q: Most ethanol plants use a falling film evaporation system.
- True
- False
A: True

Q: The major reason an ethanol plant uses the drying process is to increase co-product value.
- True
- False
A: True

Q: Before distillers’ grain can be sold it must be dried.
- True
- False
A: False

Q: Grain particles in the dryer air stream are removed from the air flow by Cyclone Separators.
- True
- False
A: True

Q: Volatile Organic Compounds, Particulate Matter, and Carbon Monoxide are regulated pollutants contained tin Dryer Exhaust.
- True
- False
A: True

Q: Volatile Organic Compounds are turned into CO2 and H2O during in the Thermal Oxidation process.
- True
- False
A: True