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MCQs

Total Questions : 129 | Page 5 of 13 pages
Question 41. Partially oxidized sewage contains __________
  1.    Nitrites and Nitrates
  2.    Nitrates and sulfur
  3.    Sulfates and nitrates
  4.    Nitrites and sulfur
 Discuss Question
Answer: Option D. -> Nitrites and sulfur
Answer: (d).Nitrites and sulfur
Question 42. The decomposition of nitrogenous organic matter in the absence of oxygen gives __________
  1.    Nitrites and water
  2.    Carbon dioxide and water
  3.    Nitrates and ammonia
  4.    Nitrogen, ammonia and organic acids
 Discuss Question
Answer: Option D. -> Nitrogen, ammonia and organic acids
Answer: (d).Nitrogen, ammonia and organic acids
Question 43. Which of the following is formed from the anaerobic oxidation of organic matter?
  1.    NO₃
  2.    SO₄
  3.    H₂S
  4.    NH₂
 Discuss Question
Answer: Option C. -> H₂S
Answer: (c).H₂S
Question 44. The aerobic decomposition of sulfurous organic matter gives __________
  1.    Nitrites and water
  2.    Carbon dioxide and water
  3.    Sulfates and water
  4.    Nitrogen and Ammonia
 Discuss Question
Answer: Option C. -> Sulfates and water
Answer: (c).Sulfates and water
Question 45. The energy released during the aerobic oxidation of organic matter is _____ kilo calories.
  1.    26
  2.    254
  3.    360
  4.    484
 Discuss Question
Answer: Option D. -> 484
Answer: (d).484
Question 46. The number of stages required for the completion of aerobic oxidation is __________
  1.    1
  2.    2
  3.    3
  4.    4
 Discuss Question
Answer: Option A. -> 1
Answer: (a).1
Question 47. The full form of BOD is __________
  1.    Biodegradable oxygen demand
  2.    Biological oxygen demand
  3.    Biochemical oxygen demand
  4.    Bandwidth on demand
 Discuss Question
Answer: Option C. -> Biochemical oxygen demand
Answer: (c).Biochemical oxygen demand
Question 48. The energy released during the anaerobic oxidation of organic matter is _____ kilo calories.
  1.    26
  2.    254
  3.    360
  4.    484
 Discuss Question
Answer: Option A. -> 26
Answer: (a).26
Question 49. Which of the following is formed from oxidation of organic matter in the presence of oxygen?
  1.    NO₃
  2.    SO₄
  3.    H₂S
  4.    NH₂
 Discuss Question
Answer: Option A. -> NO₃
Answer: (a).NO₃
Question 50. _____ is the amount of oxygen required to oxidize only organic matter in sewage.
  1.    Turbidity
  2.    BOD
  3.    COD
  4.    DO
 Discuss Question
Answer: Option B. -> BOD
Answer: (b).BOD

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