Ethanol Production problems
- 1. What are different substrates used for ethanol production?
Options- A. Starch containing substrate
- B. Juices from sugarcane or molasses or sugar beet
- C. Waste product from wood or processed wood
- D. All of the above Discuss
Correct Answer: All of the above
- 2. After the fermentation is over, ethanol is recovered by
Options- A. centrifugation
- B. distillation
- C. filtration
- D. cell disintegration Discuss
Correct Answer: distillation
- 3. Which of the following is used for agitation in a fermentor?
Options- A. Impeller
- B. Baffles
- C. Sparger
- D. All of these Discuss
Correct Answer: Impeller
- 4. Yeast is used in the production of
Options- A. ethyl alcohol
- B. acetic acid
- C. cheese
- D. curd Discuss
Correct Answer: ethyl alcohol
- 5. The fermentor can be sterilized by
Options- A. keeping it in the oven
- B. steam under pressure
- C. boiling
- D. all of these Discuss
Correct Answer: steam under pressure
- 6. How is air supply to the fermentor sterilized?
Options- A. By heat filtration
- B. Filtration through fibrous material
- C. Filtration through granular material
- D. All of the above Discuss
Correct Answer: All of the above
- 7. Which of the following organism is not used in any of the traditional industrial fermentation?
Options- A. E. coli
- B. Yeast
- C. Bacillus
- D. Pseudomonas Discuss
Correct Answer: E. coli
- 8. Ethanol is produced by
Options- A. continuous fermentation
- B. batch fermentation
- C. both (a) and (b)
- D. none of these Discuss
Correct Answer: both (a) and (b)
- 9. Candida utilis is used for the fermentation of waste sulphate liquor since it ferments
Options- A. hexoses only
- B. pentoses only
- C. both hexoses and pentoses
- D. none of these Discuss
Correct Answer: both hexoses and pentoses
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