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MCQs

Total Questions : 76 | Page 4 of 8 pages
Question 31. ________ combines aeration basin and secondary clarifier into single unit.
  1.    Primary clarifier
  2.    Aerobic unit
  3.    Sequential batch reactor
  4.    Secondary clarifier
 Discuss Question
Answer: Option C. -> Sequential batch reactor
Answer: (c).Sequential batch reactor
Question 32. When the aeration system shuts off, the basin begins to perform as a ______
  1.    Primary clarifier
  2.    Secondary clarifier
  3.    Anaerobic unit
  4.    Aeration unit
 Discuss Question
Answer: Option B. -> Secondary clarifier
Answer: (b).Secondary clarifier
Question 33. SBR operates as ________ process.
  1.    Batch
  2.    Continuous
  3.    Semi-continuous
  4.    Discontinuous
 Discuss Question
Answer: Option A. -> Batch
Answer: (a).Batch
Question 34. _______ provides the dual purpose of providing DO and mixing of the mixed liquor and wastewater.
  1.    Flocculation
  2.    Aeration
  3.    Sedimentation
  4.    Clarification
 Discuss Question
Answer: Option B. -> Aeration
Answer: (b).Aeration
Question 35. What does SBR stand for?
  1.    Secondary batch reactor
  2.    Sequential biological reactor
  3.    Secondary biological reactor
  4.    Sequential batch reactor
 Discuss Question
Answer: Option D. -> Sequential batch reactor
Answer: (d).Sequential batch reactor
Question 36. Calculate the volume of the aeration tank required for the following data:
Flow: 800 m³/d
BOD: 1000 mg/L
F/M ratio: 0.15(extended aeration)
MLSS : 3500 mg/L
  1.    High sludge volume index
  2.    Low sludge volume index
  3.    Low oxygen demand
  4.    Floc formation is less
 Discuss Question
Answer: Option A. -> High sludge volume index
Answer: (a).High sludge volume index
Question 37. For the development of flocculent biomass for treating domestic water through Activated Sludge Process (ASP) what would be the Solid retention time considered?
  1.    18 hours
  2.    4 days
  3.    10 hrs
  4.    1-3 days
 Discuss Question
Answer: Option D. -> 1-3 days
Answer: (d).1-3 days
Question 38. For the development of flocculent biomass for treating industrial water through Activated Sludge Process (ASP) what would be the Solid retention time considered?
  1.    18 hours
  2.    3-5 days
  3.    20 hrs
  4.    1-3 days
 Discuss Question
Answer: Option D. -> 1-3 days
Answer: (d).1-3 days
Question 39. For the conversion of particulate organics through Activated Sludge Process (ASP) what would be the Solid retention time considered?
  1.    18 hours
  2.    1-2 days
  3.    2-4 days
  4.    5 days
 Discuss Question
Answer: Option C. -> 2-4 days
Answer: (c).2-4 days
Question 40. For the removal of BOD through Activated Sludge Process (ASP) what would be the Solid retention time considered?
  1.    18 hours
  2.    1-2 days
  3.    10 hrs
  4.    3 days
 Discuss Question
Answer: Option B. -> 1-2 days
Answer: (b).1-2 days

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