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MCQs

Total Questions : 189 | Page 6 of 19 pages
Question 51. What are different substrates used for ethanol production?
  1.    Starch containing substrate
  2.    Juices from sugarcane or molasses or sugar beet
  3.    Waste product from wood or processed wood
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Answer: (d).All of the above
Question 52. What are the fermentation conditions for the ethanol production?
  1.    pH 6; temperature 35°C
  2.    pH 5; temperature 35°C
  3.    pH 6; temperature 30°C
  4.    pH 5; temperature 30°C
 Discuss Question
Answer: Option B. -> pH 5; temperature 35°C
Answer: (b).pH 5; temperature 35°C
Question 53. Ethanol is produced by
  1.    continuous fermentation
  2.    batch fermentation
  3.    both (a) and (b)
  4.    none of these
 Discuss Question
Answer: Option C. -> both (a) and (b)
Answer: (c).both (a) and (b)
Question 54. Which of the following is used for agitation in a fermentor?
  1.    Impeller
  2.    Baffles
  3.    Sparger
  4.    All of these
 Discuss Question
Answer: Option A. -> Impeller
Answer: (a).Impeller
Question 55. Which of the following is used for aeration in a fermentor?
  1.    Impeller
  2.    Baffles
  3.    Sparger
  4.    All of these
 Discuss Question
Answer: Option C. -> Sparger
Answer: (c).Sparger
Question 56. In submerged process for the fermentation to produce citric acid,
  1.    A. niger is used with solid substrate as sweet potato
  2.    A. niger floats on the surface of solution
  3.    Fungal mycelium grows through out the solution in a deep tank
  4.    both (a) and (b)
 Discuss Question
Answer: Option C. -> Fungal mycelium grows through out the solution in a deep tank
Answer: (c).Fungal mycelium grows through out the solution in a deep tank
Question 57. Alegar is a type of vinegar produced from
  1.    fruit juices
  2.    malted grain
  3.    ethanol
  4.    ale
 Discuss Question
Answer: Option D. -> ale
Answer: (d).ale
Question 58. Which substrate is used in the fermentation of citric acid?
  1.    Beet molasses
  2.    Sucrose
  3.    Starch hydrolysate
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Answer: (d).All of these
Question 59. Vinegar production consists of
  1.    aerobic fermentation
  2.    anaerobic fermentation
  3.    aerobic fermentation followed by anaerobic fermentation
  4.    anaerobic fermentation followed by aerobic fermentation
 Discuss Question
Answer: Option D. -> anaerobic fermentation followed by aerobic fermentation
Answer: (d).anaerobic fermentation followed by aerobic fermentation
Question 60. During recovery step of citric acid, calcium citrate formed is treated with which of the following acid to precipitate calcium?
  1.    HCl
  2.    HNO3
  3.    H2SO4
  4.    None of these
 Discuss Question
Answer: Option C. -> H2SO4
Answer: (c).H2SO4

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