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MCQs

Total Questions : 74 | Page 6 of 8 pages
Question 51. What is the solid loading rate in kg/ m².d considered while designing a thickener to treat the primary sludge?
  1.    40-50
  2.    50-100
  3.    100-150
  4.    150-200
 Discuss Question
Answer: Option C. -> 100-150
Answer: (c).100-150
Question 52. What is the solid loading rate in kg/ m².d considered while designing a thickener to treat the sludge from air- activated sludge process?
  1.    100
  2.    80
  3.    20-40
  4.    10-15
 Discuss Question
Answer: Option C. -> 20-40
Answer: (c).20-40
Question 53. Anaerobic digestion occurs in the presence of oxygen.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 54. What is the solid load rating in kg/ m².d considered while designing a thickener to treat the sludge from the rotating biological contractor?
  1.    100
  2.    80
  3.    35-50
  4.    100-120
 Discuss Question
Answer: Option C. -> 35-50
Answer: (c).35-50
Question 55. Anaerobic digestion can be used to produce fuel.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 56. _________ uses anaerobic digestion.
  1.    Incineration
  2.    Combustion
  3.    Fermentation
  4.    Oxygenation
 Discuss Question
Answer: Option A. -> Incineration
Answer: (a).Incineration
Question 57. What is the percentage of methane in the biogas?
  1.    10-20 %
  2.    20-40 %
  3.    45-65 %
  4.    55-75 %
 Discuss Question
Answer: Option D. -> 55-75 %
Answer: (d).55-75 %
Question 58. How many steps are present in anaerobic digestion?
  1.    1
  2.    2
  3.    3
  4.    4
 Discuss Question
Answer: Option C. -> 3
Answer: (c).3
Question 59. What is biogas composed of?
  1.    O₂ and CO₂
  2.    CO₂ and NO₂
  3.    CH₄ and O₂
  4.    CH₄ and CO₂
 Discuss Question
Answer: Option D. -> CH₄ and CO₂
Answer: (d).CH₄ and CO₂
Question 60. What is the optimum temperature at which anaerobic digestion is carried out?
  1.    25-35 degree Celsius
  2.    55 degree Celsius
  3.    45 degree Celsius
  4.    40-50 degree Celsius
 Discuss Question
Answer: Option A. -> 25-35 degree Celsius
Answer: (a).25-35 degree Celsius

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