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MCQs

Total Questions : 476 | Page 6 of 48 pages
Question 51. Above pH 7, ammonia will be in the form of soluble ammonia ions.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 52. The higher the temperature, the lower the________
  1.    Ammonia ions
  2.    Air flow
  3.    pH
  4.    Reaction
 Discuss Question
Answer: Option B. -> Air flow
Answer: (b).Air flow
Question 53. Percentage of dissolved gas ________ with temperature and pH.
  1.    Increases
  2.    Decreases
  3.    Does not alter
  4.    Fluctuates
 Discuss Question
Answer: Option A. -> Increases
Answer: (a).Increases
Question 54. Which of the below factors do not favour high efficiency?
  1.    High pH
  2.    Low temperature
  3.    High air flow
  4.    Greater packed bed depth
 Discuss Question
Answer: Option B. -> Low temperature
Answer: (b).Low temperature
Question 55. What is the state of ammonia above a pH of 12?
  1.    Dissolved gas
  2.    Ammonia ions
  3.    Soluble ions
  4.    Inert gas
 Discuss Question
Answer: Option A. -> Dissolved gas
Answer: (a).Dissolved gas
Question 56. In a bubble column reactor, fresh water enters from the _________of the column.
  1.    Bottom
  2.    Top
  3.    Side
  4.    Top and side
 Discuss Question
Answer: Option A. -> Bottom
Answer: (a).Bottom
Question 57. Which form of oxygen is used in the process of wet air oxidation?
  1.    Molecular oxygen
  2.    Dissolved oxygen
  3.    Pure oxygen
  4.    Atomic oxygen
 Discuss Question
Answer: Option B. -> Dissolved oxygen
Answer: (b).Dissolved oxygen
Question 58. What is the minimum temperature required for WAO?
  1.    30˚C
  2.    50˚C
  3.    90˚C
  4.    150˚C
 Discuss Question
Answer: Option D. -> 150˚C
Answer: (d).150˚C
Question 59. The heat released during the oxidation is_______
  1.    Released into the atmosphere
  2.    Cooled using cooling systems
  3.    Used to maintain an operating temperature
  4.    Used as energy to boil water
 Discuss Question
Answer: Option C. -> Used to maintain an operating temperature
Answer: (c).Used to maintain an operating temperature
Question 60. What is the percentage of dry solid slurry that can be processed in a WAO system?
  1.    1%
  2.    2%
  3.    3%
  4.    4%
 Discuss Question
Answer: Option D. -> 4%
Answer: (d).4%

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