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MCQs

Total Questions : 80 | Page 4 of 8 pages
Question 31. The _________ is usually the same length in time as the aeration.
  1.    Screening stage
  2.    Mixing stage
  3.    Clarification stage
  4.    Settling stage
 Discuss Question
Answer: Option D. -> Settling stage
Answer: (d).Settling stage
Question 32. Which part of the tank is suitable for anaerobic bacteria to flourish?
  1.    Top
  2.    Bottom
  3.    Sides
  4.    Middle zone
 Discuss Question
Answer: Option B. -> Bottom
Answer: (b).Bottom
Question 33. ______ is removed by Anammox.
  1.    Nitric oxides
  2.    Nitrate
  3.    Nitrite
  4.    Ammonia
 Discuss Question
Answer: Option D. -> Ammonia
Answer: (d).Ammonia
Question 34. BOD is a physical procedure for determining DO needed for aerobic biological organisms.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 35. How many types of BOD are present?
  1.    1
  2.    2
  3.    3
  4.    4
 Discuss Question
Answer: Option B. -> 2
Answer: (b).2
Question 36. MBBR provides support for both autotrophic and heterotrophic bacteria.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 37. MBBR needs an assistance to maintain biofilm.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 38. Which of the following is not correct with respect to MBBR?
  1.    Compact design
  2.    Expandable
  3.    Multiple pass process
  4.    Load responsive
 Discuss Question
Answer: Option C. -> Multiple pass process
Answer: (c).Multiple pass process
Question 39. The ions are desorbed after ______ by the biofilm.
  1.    Nitrified
  2.    Denitrified
  3.    Adsorbed
  4.    Absorbed
 Discuss Question
Answer: Option A. -> Nitrified
Answer: (a).Nitrified
Question 40. Which ions are present on the charged surface of MBBR?
  1.    Iron
  2.    Iodine
  3.    Aluminium
  4.    Sodium
 Discuss Question
Answer: Option C. -> Aluminium
Answer: (c).Aluminium

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