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MCQs

Total Questions : 43 | Page 3 of 5 pages
Question 21.  Which of the following is used to check vortex and to improve aeration efficiency in a fermentor?
  1.    Impeller
  2.    Baffles
  3.    Sparger
  4.    All of these
 Discuss Question
Answer: Option B. -> Baffles
Question 22.  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
Question 23.  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
Question 24.  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)
Question 25.  The fermentor can be sterilized by
  1.    keeping it in the oven
  2.    steam under pressure
  3.    boiling
  4.    all of these
 Discuss Question
Answer: Option B. -> steam under pressure
Question 26.  
As the fermentation for the ethanol production is over, the cells are separated to get the biomass of yeast cells that is used
  1.    for next fermentation
  2.    as single cell protein for animal feed
  3.    as manure
  4.    all of the above
 Discuss Question
Answer: Option B. -> as single cell protein for animal feed
Question 27.  Candida utilis is used for the fermentation of waste sulphate liquor since it ferments
  1.    hexoses only
  2.    pentoses only
  3.    both hexoses and pentoses
  4.    none of these
 Discuss Question
Answer: Option C. -> both hexoses and pentoses
Question 28.  Yeast is used in the production of
  1.    ethyl alcohol
  2.    acetic acid
  3.    cheese
  4.    curd
 Discuss Question
Answer: Option A. -> ethyl alcohol
Question 29. . Which of the following microorganisms help in the ethanol production?
  1.    Saccharomyces cerevisiae
  2.    Zygomonas mobilis
  3.    Saccharomyces uvarum
  4.    All of these
 Discuss Question
Answer: Option C. -> Saccharomyces uvarum
Question 30. . The Zygomonas has a merit over yeast because
  1.    it has more osmotic tolerance to higher sugar concentration
  2.    it has high tolerance to ethanol
  3.    it has more specific growth rate
  4.    all of the above
 Discuss Question
Answer: Option D. -> all of the above

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