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MCQs

Total Questions : 74 | Page 2 of 8 pages
Question 11. What is the temperature that needs to be maintained during the process?
  1.    90˚F
  2.    95˚F
  3.    100˚F
  4.    105˚F
 Discuss Question
Answer: Option C. -> 100˚F
Answer: (c).100˚F
Question 12. What is the range of retention time during anaerobic digestion?
  1.    10-20 days
  2.    20-30 days
  3.    40-80 days
  4.    40-100 days
 Discuss Question
Answer: Option D. -> 40-100 days
Answer: (d).40-100 days
Question 13. The pathogens in digestate are _________
  1.    Highly active
  2.    Inactive
  3.    Partly inactive
  4.    Neutral
 Discuss Question
Answer: Option C. -> Partly inactive
Answer: (c).Partly inactive
Question 14. In anaerobic digestion system which of the following statement holds good?
  1.    Acids are necessary to be added to make the pH neutral
  2.    Alkalines are necessary to be added to make the pH neutral
  3.    A flocculant is to be added to bring about flocculation
  4.    A coagulant is necessary to be added in order to bring about coagulation
 Discuss Question
Answer: Option B. -> Alkalines are necessary to be added to make the pH neutral
Answer: (b).Alkalines are necessary to be added to make the pH neutral
Question 15. How much is the cow yield from anaerobic digestion that can be obtained?
  1.    0.1 m³/Kg dung
  2.    0.2 m³/Kg dung
  3.    0.3 m³/Kg dung
  4.    0.4 m³/Kg dung
 Discuss Question
Answer: Option D. -> 0.4 m³/Kg dung
Answer: (d).0.4 m³/Kg dung
Question 16. What is the volumetric organic loading in Kg COD/ m³ day for an anaerobic sequence batch reactor?
  1.    4-6
  2.    1.2-2.4
  3.    2.6-3.4
  4.    6.4-7.6
 Discuss Question
Answer: Option B. -> 1.2-2.4
Answer: (b).1.2-2.4
Question 17. What is the volumetric organic loading in Kg COD/ m³ day for an anaerobic contact digestion process?
  1.    1-8
  2.    8-10
  3.    10-12
  4.    12-15
 Discuss Question
Answer: Option A. -> 1-8
Answer: (a).1-8
Question 18. What is the hydraulic retention time for a completely mixed anaerobic digestion process?
  1.    15-30 days
  2.    40-50 days
  3.    50-60 days
  4.    60-80 days
 Discuss Question
Answer: Option A. -> 15-30 days
Answer: (a).15-30 days
Question 19. What is the hydraulic retention time for a completely mixed anaerobic contact type process?
  1.    8-10 days
  2.    5-8 days
  3.    0.5-5 days
  4.    10-12 days
 Discuss Question
Answer: Option C. -> 0.5-5 days
Answer: (c).0.5-5 days
Question 20. What is the duration of sludge in tanks for mesophilic anaerobic digestion?
  1.    10 days
  2.    12 days
  3.    15 days
  4.    18 days
 Discuss Question
Answer: Option B. -> 12 days
Answer: (b).12 days

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